CN115897853B - A cold-formed steel wall-arch hybrid structure system and assembly method - Google Patents
A cold-formed steel wall-arch hybrid structure system and assembly method Download PDFInfo
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- CN115897853B CN115897853B CN202211245719.2A CN202211245719A CN115897853B CN 115897853 B CN115897853 B CN 115897853B CN 202211245719 A CN202211245719 A CN 202211245719A CN 115897853 B CN115897853 B CN 115897853B
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Abstract
The invention discloses a cold-formed steel wall-arch mixed structure system and an assembly method, wherein the structure system comprises a plurality of assembled combined wall elements and building covers, each combined wall element comprises a column, arch supports, a combined wall and I-shaped beams, the columns are arranged at the left end and the right end of the combined wall, the I-shaped beams are arranged at the upper end and the lower end of the combined wall and are respectively connected with the columns, the arch supports are arranged in profile steel frameworks of the combined wall, the two ends of the arch supports are respectively connected to diagonal points of the connection of the columns and the I-shaped beams, the arch supports arranged in the adjacent four combined wall elements form a circle, the columns of adjacent layers are fixedly connected, the columns, the arch supports and the I-shaped beams are connected through first connection nodes, the columns and the I-shaped beams are connected through second connection nodes, and the building covers are arranged between the adjacent layers. After the arch support and the combined wall are cooperated, the lateral resistance and the vertical stability of the whole structure can be obviously improved. In addition, each part in the invention can be prefabricated in a factory, and the assembly on site is simple and convenient.
Description
Technical Field
The invention relates to the field of building engineering structures, in particular to an assembly method of a cold-formed steel wall-arch hybrid structure system.
Background
In the existing cold-formed steel structure, a combined wall formed by connecting a cold-formed thin-wall steel skeleton and a wallboard through self-tapping screws is a main bearing and anti-side member of the structure. Under the action of horizontal load, the incompatibility between the cold-formed thin-wall steel skeleton and the wallboard leads to relative rotation between the cold-formed thin-wall steel skeleton and the wallboard, screw connectors on the periphery of the combined wall are firstly sheared and damaged and gradually extend to screw connection parts in the middle of the combined wall until most of screw connectors fail, the skin effect between the cold-formed thin-wall steel skeleton and the wallboard is lost, the cold-formed steel structure loses the unique anti-seismic line, and the structure is partially collapsed or wholly collapsed.
The existing cold-formed thin-wall section steel combined wall technology usually adopts cross supports to remedy the defects, the end connection of the cross supports is complex, local damage is easy to occur under a tension state, the cross supports are easy to relax after repeated deformation, and the shearing resistance contribution of the cross supports to the cold-formed thin-wall section steel combined wall is seriously affected. In addition, the existing cold-formed thin-wall steel combined wall technology has strict requirements on compression resistance, shearing resistance, overturning resistance and the like of wall side columns, and the thin-wall double-spliced C-shaped side columns and steel pipe concrete strong side columns all face the technical problems of insufficient side column anchoring capacity and the like caused by buckling under compression or loosening of anti-pulling anchor bolts.
Disclosure of Invention
The invention aims to provide a cold-formed steel wall-arch mixed structure system, which can change the force transmission mechanism of the existing cold-formed steel structure system, increase anti-seismic and anti-theft lines except for a combined wall, improve the stress condition of a combined wall column in the existing cold-formed steel structure system and can obviously improve the anti-seismic performance of the cold-formed steel structure. Meanwhile, the assembly method of the novel cold-formed steel wall-arch hybrid structure system is also provided, and the assembly method is simple and convenient.
The cold forming steel wall-arch mixed structure system comprises a plurality of assembled combined wall elements and building covers, wherein each combined wall element comprises a column, arch supports, combined walls and I-shaped beams, the columns are arranged at the left end and the right end of each combined wall, the I-shaped beams are arranged at the upper end and the lower end of each combined wall, the two ends of each I-shaped beam are respectively connected with the columns, the arch supports are arranged in profile steel frameworks of the combined walls, the two ends of each arch support are respectively connected to diagonal points of the connection of the columns and the I-shaped beams, the arch supports arranged in the adjacent four combined wall elements form a circle, the columns of adjacent layers are fixedly connected, the columns, the arch supports and the I-shaped beams are connected through first connecting nodes, the columns and the I-shaped beams are connected through second connecting nodes, and the building covers are arranged between the adjacent layers.
Preferably, the post comprises an embedded steel member, a cold-formed thick-wall steel pipe, self-compacting concrete and embedded bolts, wherein the embedded steel member is arranged inside the cold-formed thick-wall steel pipe, the self-compacting concrete is filled in the middle of the cold-formed thick-wall steel pipe, meanwhile, the middle of the embedded steel member is embedded in the self-compacting concrete, a plurality of groups of embedded bolts are horizontally arranged in the self-compacting concrete, two ends of each embedded bolt extend out of the side wall of the cold-formed thick-wall steel pipe, the cold-formed thick-wall steel pipe at one end of the post, which is not connected with an arch support, is grooved, and reserved bolt holes are formed in the embedded steel member and two end parts of the cold-formed thick-wall steel pipe.
Preferably, adjacent layer columns at the first connecting node are connected through battens, two ends of each batten are respectively inserted into the end parts of cold-bent thick-wall steel pipes of the adjacent layer columns, and the adjacent layer columns are respectively and fixedly connected with the battens by adopting split bolts;
The adjacent layer columns at the second connecting node are connected through the battens and the plugboards, two ends of each batten are respectively inserted into the cold-bending thick-wall steel pipe ends of the adjacent layer columns, and the adjacent layer columns are respectively and fixedly connected with the battens by adopting the split bolts.
The arch support comprises a steel joint, a cold-formed thick-wall round steel pipe and concrete, wherein the concrete is filled in the cold-formed thick-wall round steel pipe, the steel joints are arranged at two ends of the cold-formed thick-wall round steel pipe, the steel joint comprises a round steel pipe, a sealing plate and steel plates, one end of the round steel pipe is provided with the sealing plate, the two steel plates are arranged in parallel, a gap is reserved between the two steel plates, one end of the steel plate is fixedly connected with the sealing plate and the round steel pipe, bolt holes are reserved at two ends of the cold-formed thick-wall round steel pipe, the round steel pipe and the steel plates, and the ends of the cold-formed thick-wall round steel pipe are connected into a whole through split bolts after being inserted into the round steel pipe.
The combined wall comprises a cold-formed thin-wall steel skeleton, wallboards, heat-insulating layers and prefabricated plate units, wherein the cold-formed thin-wall steel skeleton comprises a plurality of groups of cold-formed thin-wall steel pipes and a plurality of X-shaped steel sheets, the prefabricated plate units are arranged on two sides of an arch support in pairs, one cold-formed thin-wall steel pipe is arranged at the left end and the right end of each prefabricated plate unit, the cold-formed thin-wall steel pipes corresponding to the two ends of each pair of prefabricated plate units are fixedly connected through the X-shaped steel sheets, at least two pairs of the prefabricated plate units are arranged between every two adjacent prefabricated plate units, and the heat-insulating layers are arranged between wallboards on the two sides.
The combined wall is embedded in eight cold-formed angle steels on the left column, the right column, the upper I-shaped beam and the lower I-shaped beam and is fixedly connected with the columns and the I-shaped beam through bolts.
Preferably, the first connecting node comprises a first node plate and connecting sheets, wherein the first node plate is embedded into a web plate at one end of the I-shaped beam in pairs, is fixedly connected with the I-shaped beam and is fixedly connected with the side wall of the column through a split bolt, and a steel joint at the end part of the arch support is fixedly connected with the first node plate through the connecting sheets arranged in pairs and is further fixedly connected with the column and the I-shaped beam.
Preferably, the second connecting node comprises a second node plate and an inserting plate, wherein the second node plate is embedded into a web plate at one end of the I-shaped beam in pairs, the inserting plate is inserted into a cold-bending thick-wall steel pipe slot of the column, and two ends of the inserting plate are embedded between the upper flange and the lower flange of the I-shaped beam and are positioned between the second node plate and the web plate of the I-shaped beam.
Preferably, the floor is inlaid in the web plate of the top I-shaped beam of the combined wall element and is fixedly connected with the web plate and the lower flange of the I-shaped beam through bolts.
The invention relates to an assembly method of a cold-formed steel wall-arch mixed structure system, which comprises the following steps:
s1, assembling adjacent layer columns, arch supports and I-shaped beams;
s11, inserting the battens and the plugboards into the top ends of the lower-layer columns, mounting the upper-layer columns to the position right above the lower-layer columns, and fixedly connecting the lower-layer columns and the upper-layer columns through the battens and the plugboards;
only the connection part of the column and the I-shaped beam does not need to be provided with a plugboard;
S12, after the I-shaped beam is arranged at the target position, respectively embedding the first node plate and the second node plate into webs at two ends of the I-shaped beam in pairs, and fixedly connecting the webs with the side walls of the columns;
s13, fixing two ends of the arch support on the first gusset plate through paired connecting sheets respectively;
s2, assembling a lower layer composite wall and a floor;
S21, symmetrically arranging a pair of cold-formed angle steels on the two sides of the arch support on the side wall of the lower column connected with the combined wall, and symmetrically arranging a pair of cold-formed angle steels on the two sides of the arch support on the upper flange of the H-shaped beam at the bottom;
S22, inserting the side unit into a cold-formed angle steel connected with the upper flange of the bottom I-shaped beam, sliding the side unit to the lower column along the direction of the cold-formed angle steel, tightly attaching the side unit to the side wall of the lower column, and fixedly connecting the side unit with the lower column, the bottom I-shaped beam and the cold-formed angle steel connected with the side unit;
s23, fixedly connecting two parallel cold-formed thin-wall steel pipes through an X-shaped steel sheet;
s24, installing cold-formed thin-wall steel pipes and intermediate units according to the designed intervals, and fixedly connecting the X-shaped steel sheets with the cold-formed thin-wall steel pipes by adopting the same method as the step S23;
S25, installing two side wallboards after embedding heat preservation layers between the side units and the middle units and between the adjacent middle units, and fixedly connecting the wallboards, the cold-formed thin-wall steel pipes and cold-formed angle steels of the upper flanges of the H-shaped beams at the bottom;
S26, fixedly connecting one limb of the cold-formed angle steel with the lower flange of the I-shaped beam at the top, and fixedly connecting the other limb of the cold-formed angle steel with the top of the wallboard;
S27, embedding the floor system into the web plate of the top I-shaped beam, and fixedly connecting the web plate of the top I-shaped beam with the lower flange;
s3, assembling an upper layer of combined wall;
S31, arranging cold-formed angle steels on two sides of the arch support in pairs by adopting the same method as in S2, and fixedly connecting the cold-formed angle steels arranged along the upper column with the side wall of the upper column;
s32, installing paired cold-formed angle steel on the upper flange of the top I-shaped beam, and fixedly connecting the floor system, the upper flange of the top I-shaped beam and the cold-formed angle steel;
S33, assembling the upper layer composite wall by adopting the same method as the steps S22-S26.
Compared with the prior art, the invention has the remarkable technical effects that:
(1) The invention designs a combined wall-arch cooperative stress structure system, changes the stress mechanism that the traditional cold-formed steel structure system only depends on a single shear resistance of the combined wall, increases the anti-seismic defense line of the cold-formed steel structure system, and can obviously improve the anti-seismic performance of the structure;
(2) The arch support converts lateral loads applied to the cold-formed steel structure into column axial forces which can be offset mutually, so that the shearing and compression requirements of the side columns are reduced, the stress condition of the combined wall side column in the existing cold-formed steel structure system is improved, and the vertical stability of the whole structure is improved;
(3) The node plate can replace a pulling-resistant piece and a pulling-resistant anchor bolt in the existing cold-formed steel structure system, solves the technical problem of insufficient anchoring capacity of the side column of the combined wall caused by loosening of the pulling-resistant anchor bolt under the action of repeated load, and improves the anti-capsizing capacity of the structure.
(4) All parts in the combined wall-arch cooperative stress structure system designed by the invention can be prefabricated in a factory, and the field assembly is simple and convenient.
Drawings
FIG. 1 is a schematic structural diagram of a novel cold-formed steel wall-arch hybrid structural system in accordance with the present invention;
FIG. 2 is a schematic view of the structure of the center pillar of the present invention;
FIG. 3 is a schematic view of the structure of the arch support of the present invention;
FIG. 4 is a schematic view of a first node board according to the present invention;
FIG. 5 is a schematic view of a second gusset of the present invention;
FIG. 6 is a schematic view of the structure of the pair of connecting pieces of the present invention;
FIG. 7 is a flow chart of the construction and assembly of the composite wall of the present invention;
FIG. 8 is a flow chart of the assembly of the support-I-beam-column connection node of the present invention;
FIG. 9 is a flow chart of the assembly of the I-beam-column connection node of the present invention;
FIG. 10 is a flow chart of the assembly of the post, arch support, and composite wall of the present invention;
FIG. 11 is a schematic illustration of the connection of a cold formed steel composite floor to a top I-beam.
In the figure, a column 1, a lower column 1a, an upper column 1b, a profile steel member 1-1, a steel pipe 1-2a with a non-grooved end part, a steel pipe 1-2b with a grooved end part, a self-compacting concrete 1-3, an embedded bolt 1-4, a reserved bolt hole 1-5, an arch support 2, a steel joint 2-1, a round steel pipe 2-1a, a sealing plate 2-1b, a steel plate 2-1c, a reserved bolt hole 2-1d, a cold-formed thick-wall round steel pipe 2-2, an internally filled concrete 2-3, a combined wall 3, a cold-formed thin-wall steel pipe 3-1a, an X-shaped steel sheet 3-1b, a wallboard 3-2, a heat insulation layer 3-3, a tapping screw 3-4, an edge unit 3-5a, a middle unit 3-5b, an I-shaped beam 4a, a bottom I-shaped beam 4b, a node 5, a support-I-shaped beam-column connecting node 5-2, a building cover 6, a cold-formed angle steel 7-1, a square board 7-2, a first connecting plate 7-7 a, a second connecting plate 7-7 b, a and a connecting plate 7-6-c are reserved bolt.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
As shown in figures 1 to 11, the novel cold-formed steel wall-arch mixed structure system comprises a plurality of assembled combined wall elements and a building cover 6, wherein each combined wall element comprises a column 1, an arch support 2, a combined wall 3 and an I-shaped beam 4, the column 1 is cold-formed thick-wall rectangular steel pipe concrete of a pre-buried steel member 1-1, the cold-formed thick-wall rectangular steel pipe concrete is arranged at the left end and the right end of the combined wall 3, the I-shaped beam 4 is arranged at the upper end and the lower end of the combined wall 3, the two ends of the I-shaped beam 4 are respectively connected with the column 1, the arch support 2 is cold-formed thick-wall round steel pipe concrete with steel joints 2-1 arranged at the two ends, the two ends of the arch support are respectively connected to the diagonal points of the column 1 and the I-shaped beam 4 through steel joints 2-1, the arch supports 2 arranged in the adjacent four combined wall elements form a circle, the columns 1 of adjacent layers are fixedly connected with each other through joints 5, the I-shaped beam 4 is a cold-formed steel combined building cover, the I-shaped beam 4 is arranged between the adjacent layers, the I-shaped beam 4 is embedded into a web plate, the I-shaped beam 4b is fixedly connected with the flanges of the common building structure through the flanges 7 a and the flanges 4b are fixedly connected with the flanges through the flanges.
Preferably, the I-shaped beam 4 can directly adopt hot-rolled I-shaped steel or an I-shaped section formed by connecting joist guide rails in adjacent cold-formed thin-walled steel combined floors 6 through bolts 7-5, and bolt holes are reserved on the flanges and webs of the I-shaped beam 4.
As shown in FIG. 2, the post 1 comprises an embedded steel structural member 1-1, a cold-formed thick-wall steel pipe 1-2, self-compacting concrete 1-3 and embedded bolts 1-4, wherein the embedded steel structural member 1-1 is arranged inside the cold-formed thick-wall steel pipe 1-2, the self-compacting concrete 1-3 is filled in the middle of the cold-formed thick-wall steel pipe 1-2, meanwhile, the embedded steel structural member 1-1 is embedded in the self-compacting concrete 1-3, a plurality of groups of embedded bolts 1-4 are horizontally arranged in the self-compacting concrete 1-3, two ends of the embedded bolts 1-4 extend out of the side wall of the cold-formed thick-wall steel pipe 1-2, the cold-formed thick-wall steel pipe 1-2 is divided into an end non-slotted steel pipe 1-2a and an end slotted steel pipe 1-2b, and the I-shaped beam-post connecting nodes (namely, a first connecting node 5-1) and an I-shaped beam-post connecting node (namely, a second connecting node 5-2) are respectively used for reserving the steel pipe bolt holes 1-5 in the cold-formed thick-wall steel pipe 1-2, as shown in FIG. 2.
Preferably, the groove depth of the end grooved steel pipe 1-2b is half the width of the inserting plate 7-3c, the groove width is not less than 10mm, and the embedded steel section component 1-1 comprises, but is not limited to, hot rolled angle steel and T-shaped steel, and the thickness is not less than 6mm.
As shown in FIG. 3, the arch support 2 comprises a steel joint 2-1, a cold-formed thick-wall round steel pipe 2-2 and an internally filled concrete 2-3, wherein the concrete 2-3 is filled in the cold-formed thick-wall round steel pipe 2-2, the steel joints 2-1 are arranged at two ends, the steel joint 2-1 is formed by welding a round steel pipe 2-1a, a sealing plate 2-1b and a steel plate 2-1c, one end of the round steel pipe 2-1a is provided with a sealing plate 2-1b, two steel plates 2-1c are arranged in parallel, a gap is reserved between the two steel plates, one end of the sealing plate 2-1b and the round steel pipe 2-1a are fixedly connected, bolt holes 2-1d are reserved at two ends of the cold-formed thick-wall round steel pipe 2-2, the round steel pipe 2-1a and the steel plate 2-1c, and the ends of the cold-formed thick-wall round steel pipe 2-2 are connected into a whole through a split bolt 7-5b after being inserted into the round steel pipe 2-1 a.
The arch support can be used as a first anti-seismic line of the cold-formed steel structure, and after the arch support is cooperated with the combined wall, the side load applied to the cold-formed steel structure can be effectively converted into column axial force which can be mutually offset, so that the skin effect of the combined wall is prevented from being weakened too early due to failure of corner screw connection, and the side resistance and the vertical stability of the whole structure can be obviously improved.
As shown in fig. 3 to 10, the connection accessory 7 comprises a cold-bending angle steel 7-1, a square 7-2, a gusset plate 7-3, a connection sheet 7-4 and a bolt 7-5. The node plates 7-3 comprise a first node plate 7-3a, a second node plate 7-3b and an inserting plate 7-3c, the bolts 7-5 comprise common bolts 7-5a and split bolts 7-5b, the first node plate 7-3a and the second node plate 7-3b are all welded and formed into an integral component, and bolt holes 7-6 are reserved in cold bending angle steel 7-1, a square block 7-2, the node plate 7-3 and the connecting sheet 7-4.
The first connecting node 5-1 comprises a first node plate 7-3a and connecting sheets 7-4, wherein the first node plate 7-3a is embedded into a web plate at one end of an I-shaped beam 4 in pairs, is fixedly connected with the I-shaped beam 4 and is fixedly connected with the side wall of the column 1 through a split bolt 7-5b, a steel joint 2-1 at the end part of an arch support 2 is fixedly connected with the first node plate 7-3a through the connecting sheets 7-4 which are arranged in pairs and is further fixedly connected with the column 1 and the I-shaped beam 4, adjacent layer columns 1 at the first connecting node 5-1 are connected through a batten 7-2, two ends of the batten 7-2 are respectively inserted into cold-bent thick-wall steel pipes 1-2 at the end parts of the adjacent layer columns 1, and the adjacent layer columns 1 are respectively fixedly connected with the batten 7-2 through the split bolts 7-5 b.
The second connecting joint 5-2 comprises a second joint plate 7-3b and a plugboard 7-3c, wherein the plugboard 7-3c is inserted into a groove of a cold-bending thick-wall steel pipe 1-2 of the column 1, the second joint plate 7-3b is embedded into a web plate at one end of an I-shaped beam 4 in pairs, two ends of the plugboard 7-3c are embedded between upper and lower flanges of the I-shaped beam 4 and are positioned between the second joint plate 7-3b and the web plate of the I-shaped beam 4, bolts sequentially penetrate through bolt holes (vertical plates positioned on the side face of the column) of the second joint plate 7-3b, webs of the I-shaped beam, plugboards 7-3c and vertical plates of the second joint plate 7-3b on the other side, and finally, the bolts sequentially penetrate through reserved holes 1-5 of the column 1 and reserved holes (parallel to the side face of the column) of the second joint plate 7-3b, connection between the column 1 and the I-shaped beam 4 is completed, adjacent layers of the column 1 are connected through battens 7-2 and 7-3c, adjacent layers of the column 1 are respectively inserted into the two adjacent layers of the column 1-2, and the adjacent layers of the two layers of the column 1-2 are respectively connected by fixedly connecting the bolts and the adjacent layers of the column 1-2.
Preferably, the thickness of the steel plates used for the first node plate 7-3a and the second node plate 7-3b is not smaller than 4mm, the thickness of the inserting plate 7-3c is not smaller than 10mm, the diameters of the common bolt 7-5a and the split bolt 7-5b are not smaller than 10mm, the connecting plates 7-4 are arranged in pairs, and the thickness of the steel plates used is not smaller than 4mm.
As shown in FIG. 7, the composite wall 3 comprises a cold-formed thin-walled steel skeleton 3-1, wall plates 3-2, heat-insulating layers 3-3 and prefabricated plate units 3-5, wherein the cold-formed thin-walled steel skeleton 3-1 comprises a plurality of groups of cold-formed thin-walled steel pipes 3-1a and X-shaped steel sheets 3-1b, the prefabricated plate units 3-5 are arranged on two sides of an arch support in pairs, one cold-formed thin-walled steel pipe 3-1a is arranged at the left end and the right end of each prefabricated plate unit 3-5, the cold-formed thin-walled steel pipes 3-1a corresponding to the two ends of each pair of prefabricated plate units 3-5 are fixedly connected through a plurality of X-shaped steel sheets 3-1b (namely, the X-shaped steel sheets 3-1b connect the cold-formed thin-walled steel pipes 3-1a arranged on two sides of the arch support in pairs), the wall plates 3-2 are arranged on the outer sides of the cold-formed thin-walled steel pipes 3-1a in a whole through tapping screws 3-4, the heat-insulating layers 3-3 are arranged in a cavity formed by the wall plates 3-2 on two sides, the prefabricated plate units 3-5 are arranged on the two sides of the cold-formed thin-walled steel skeleton 3-1, the wall plates 3-2, the tapping layers 3-5, the heat-5 are arranged between the middle units 3-5 and the middle units 3-5 are arranged between the middle units 3-5 and the middle units 3a between the middle units 3-5, and the heat insulation layer 3-3 is positioned between the two side wallboards 3-2. The combined wall is connected with the column and the I-shaped beam through cold bending angle steel, embedded bolts and common bolts. Arrows a1, b1, c1, d1, e1, f1, g1, h1 in fig. 7 indicate the order of installation of the corresponding structures in the figure.
The two side units 3-5a are respectively and fixedly connected with the two end columns 1, the middle unit 3-5b is arranged between the two side units 3-5a every 800-1200 mm, a group of cold-formed thin-walled steel pipes 3-1a are arranged between the side units 3-5a and the middle unit 3-5b and between the adjacent middle units 3-5b (namely, two ends of the side units and two ends of the middle unit are respectively provided with one cold-formed thin-walled steel pipe 3-1 a). Because the side units 3-5a and the middle units 3-5b are prefabricated components, cold-formed thin-wall steel pipes in the prefabricated plate units which are oppositely arranged at the two sides of the arch support are directly connected through X-shaped steel sheets during installation, then the cold-formed thin-wall steel pipes are selectively arranged at the two sides of the arch support in pairs at the rear assembly position according to design requirements and are tied through the X-shaped steel sheets, and finally the rear assembly position is embedded into the heat insulation layer and the wallboard is installed.
The arch support is arranged in the cold-formed thin-wall steel skeleton 3-1, components (including cold-formed thin-wall steel pipes, wallboards, prefabricated plate units and the like) on two sides of the wall body are required to be synchronously and respectively installed, the cold-formed thin-wall steel pipes on two sides of the wall body are symmetrical and separated, the cold-formed thin-wall steel pipes corresponding to two sides of the wall body are required to be tied through X-shaped steel sheets to form a stable wall skeleton, and an operation space is required when the X-shaped steel sheets are installed, so that a post-assembly position is required to be reserved between the edge units and the middle units.
In addition, the intermediate unit may not be provided, and the intermediate unit may be provided only for the purpose of improving the assembly speed. Even if an intermediate unit is not arranged, a rear assembling position is reserved between the two side units, so that the cold-formed thin-wall steel pipes in the side units which are oppositely arranged can be conveniently tied through the X-shaped steel sheet.
The combined wall 3 is connected with the column 1 and the I-shaped beam 4 through cold bending angle steel 7-1 and bolts, the column 1 is connected with the side wall of the combined wall 3 and is positioned at two sides of the arched support 2, a pair of cold bending angle steel 7-1 is symmetrically arranged on the flange of the connection of the I-shaped beam 4 and the combined wall 3 and is positioned at two sides of the arched support 2, a pair of cold bending angle steel 7-1 is symmetrically arranged, and the combined wall 3 is inlaid in the eight cold bending angle steel 7-1 on the left column 1, the right column 1 and the upper I-shaped beam 4 and is fixedly connected with the column 1 and the I-shaped beam 4 through bolts.
As shown in fig. 8 to 9, the joint 5 includes an arch support-i-beam-column connection joint (i.e., a first connection joint 5-1) and an i-beam-column connection joint (i.e., a second connection joint 5-2), the column 1, the arch support 2 and the i-beam 4 are connected by the first connection joint 5-1, and the column 1 and the i-beam 4 are connected by the second connection joint 5-2. The assembling process of the arched support-I-beam-column connecting joint 5-1 comprises the steps of inserting the top end of a lower column 1a into a batten 7-2, installing an upper column 1b right above the lower column 1a, fixedly connecting the lower column 1a with the upper column 1b by adopting a split bolt 7-5b, arranging an I-beam 4 at a target position, embedding a first gusset plate 7-3a into webs at two ends of the I-beam 4 in pairs, connecting the gusset plate 7-3a with the side wall of the column 1 into a whole through the split bolt 7-5b, and fixedly connecting the first gusset plate 7-3a with a steel joint 2-1 of the arched support 2 through a pair of connecting pieces 7-4 and a common bolt 7-5a, wherein the arrows a2, b2, c2 and d2 in FIG. 8 are the installation sequence of corresponding structures in the figure. The assembly process of the I-shaped beam-column connecting joint 5-2 comprises the steps of inserting the top end of a lower column 1a into a batten 7-2 and an inserting plate 7-3c, installing an upper column 1b right above the lower column 1a, fixedly connecting the lower column 1a and the upper column 1b by adopting a split bolt 7-5b, arranging an I-shaped beam 4 at a target position, embedding second node plates 7-3b into webs at two ends of the I-shaped beam 4 in pairs, fixedly connecting the second node plates 7-3b with the I-shaped beam 4 and the inserting plate 7-3c by adopting common bolts 7-5a, and integrally connecting the second node plates 7-3b with the side wall of the column 1 by adopting split bolts 7-5b, wherein the arrow-headed a3, b3, c3, d3 and e3 in FIG. 9 are the installation sequences of corresponding structures in the figure.
The assembling process of the column 1, the arch support 2 and the combined wall 3 is shown in fig. 10, wherein after the arch support 2 is fixedly connected with the column 1 and the I-shaped beam 4 according to fig. 8-9, cold bending angle steel 7-1 is arranged on two sides of the arch support 2 in pairs and is fixedly connected with upper flanges of the column 1 and the bottom I-shaped beam 4a through embedded bolts 1-4 and common bolts 7-5a respectively, after the common bolts 7-5a (with upward screw rods) are arranged on the lower flanges of the top I-shaped beam 4b, the side units 3-5a are inserted into cold bending angle steel 7-1 connected with the upper flanges of the bottom I-shaped beam 4a, the side units 3-5a are slid to the lower layer column 1a along the direction of the cold bending angle steel 7-1 and are clung to the side walls of the lower layer column 1a, the side units 3-5a are connected into a whole through self-tapping screws 3-4, cold bending thin wall steel pipes 3-1a and middle units 3-5b are installed according to the design intervals, the assembling process of X-piece 3-1b and the tap-3-2 is completed in sequence according to fig. 7, the assembling process of the tap-3-5 b is completed, and after the tap-shaped steel 3-4 passes through the cold bending angle steel 3-1a and the heat insulation layer 3-4, and the cold bending angle steel is assembled with the side wall 4. The arrows a4, b4, c4, d4, e4, f4, g4 in fig. 10 indicate the order of installation of the corresponding structures in the figure.
The assembling method of the novel cold formed steel wall-arch mixed structure system comprises the following steps:
S1, assembling adjacent layer columns 1, arch supports 2 and I-shaped beams 4;
S11, after inserting the battens 7-2 and the plugboards 7-3c into the top ends of the lower layer columns 1a, installing the upper layer columns 1b right above the lower layer columns 1a, and fixedly connecting the lower layer columns 1a and the upper layer columns 1b by adopting split bolts 7-5 b;
s12, after the I-shaped beam 4 is arranged at a target position, the first node plate 7-3a and the second node plate 7-3b are embedded into webs at two ends of the I-shaped beam 4 in pairs and are connected with the side wall of the column 1 into a whole through split bolts 7-5 b;
s13, fixedly connecting the first gusset plate 7-3a with the steel joint 2-1 of the arch support 2 through the pair of connecting sheets 7-4 and the common bolt 7-5 a;
S2, assembling the lower layer composite wall 3a and the floor system 6;
s21, arranging cold bending angle steel 7-1 in pairs on two sides of an arch support 2, and fixedly connecting the cold bending angle steel with the lower layer column 1a and the upper flange of the bottom I-shaped beam 4a through embedded bolts 1-4 and common bolts 7-5a respectively;
S22, after a common bolt 7-5a (with a screw upwards) is arranged on the lower flange of the top I-shaped beam 4b, inserting the side unit 3-5a into a cold-formed angle steel 7-1 connected with the upper flange of the bottom I-shaped beam 4a, sliding the side unit 3-5a to the lower column 1a along the direction of the cold-formed angle steel 7-1 and tightly attaching the side unit to the side wall of the lower column 1a, and connecting the side unit (3-5 a) and the cold-formed angle steel 7-1 into a whole through a tapping screw 3-4;
S23, fixedly connecting an X-shaped steel sheet 3-1b with the cold-formed thin-wall steel tube 3-1a through self-tapping screws 3-5;
S24, installing the cold-formed thin-walled steel pipe 3-1a and the intermediate unit 3-5b according to the designed interval, and fixedly connecting the X-shaped steel sheet 3-1b with the cold-formed thin-walled steel pipe 3-1a by adopting the same method of the step S23;
The method comprises the steps of symmetrically installing edge units on two sides of an arch support, embedding the edge units (the unexposed ends of the cold-formed thin-wall steel pipes) which are arranged in pairs on the two sides into cold-formed angle steels which are arranged along the sides of a column, sequentially penetrating self-tapping screws through the cold-formed angle steels, a wallboard and the cold-formed thin-wall steel pipes, then fixedly connecting the cold-formed thin-wall steel pipes, and then carrying out drawknot on the cold-formed thin-wall steel pipes on the other ends of the edge units which are arranged in pairs on the two sides through X-shaped steel sheets. The middle units are symmetrically arranged on two sides of the arch support, rear assembling positions are reserved between the middle units and the side units (the rear assembling positions can be used for selectively arranging cold-formed thin-wall steel pipes in pairs according to design requirements and are tied through X-shaped steel sheets, the spacing between the arranged cold-formed thin-wall steel pipes and the cold-formed thin-wall steel pipes in the prefabricated plate units on the same side is generally about 400-600 mm), then the cold-formed thin-wall steel pipes at two ends of the middle units which are arranged on two sides in pairs are tied through the X-shaped steel sheets, finally, an insulating layer is embedded in the rear assembling positions and a wallboard is installed, wherein the two ends of the wallboard are fixed on the cold-formed thin-wall steel pipes exposed out of the wallboard in the side units and the middle units through self-tapping screws, and the middle of the wallboard is fixedly connected with the cold-formed thin-wall steel pipes arranged in the middle of the adjacent prefabricated plate units through the self-tapping screws.
S25, installing a wallboard 3-2 after embedding an insulating layer 3-3 between the side units 3-5a and the middle units 3-5b and between the adjacent middle units 3-5b, and fixedly connecting the wallboard 3-2, the cold-formed thin-wall steel pipe 3-1a and the cold-formed angle steel 7-1 of the upper flange of the bottom I-shaped beam 4a through self-tapping screws 3-4;
s26, after one limb of the cold-formed angle steel 7-1 passes through a reserved bolt 7-5a of the lower flange of the I-shaped beam 4b in the step S22, the other limb of the cold-formed angle steel 7-1 is fixedly connected with the top of the wallboard 3-2 through a self-tapping screw 3-4;
s27, embedding the cold-formed steel combined floor system 6 into the web plate of the top I-shaped beam 4b, and fixedly connecting the floor system 6 with the web plate and the lower flange of the I-shaped beam 4b through common bolts 7-5a (see FIG. 11);
In the connection process, the common bolts 7-5a sequentially pass through the lower flange of the top I-shaped beam 4b, the cold bending angle steel 7-1 and the floor system 6 from bottom to top, and in addition, the common bolts 7-5a sequentially pass through one side of the floor system 6, the web plate of the top I-shaped beam 4b and the other side of the floor system 6 and are fixedly connected.
S3, assembling an upper layer combined wall 3b;
S31, arranging cold-formed angle steels 7-1 on two sides of the arch support 2 in pairs by adopting the same method as in S2, and fixedly connecting the cold-formed angle steels 7-1 arranged along the upper column 1b with the side wall of the upper column 1b through embedded bolts 1-4;
S32, after the cold-formed angle steel 7-1 is installed on the upper flange of the top I-shaped beam 4b, a common bolt 7-5a sequentially passes through the cold-formed steel combined floor system 6, the upper flange of the top I-shaped beam 4b and the cold-formed angle steel 7-1 and is fixedly connected (see FIG. 11);
S33, assembling the upper layer composite wall 3b by adopting the same method as the steps S22-S26.
The novel cold-formed steel wall-arch mixed structure system can remarkably improve the anti-seismic performance of a cold-formed steel structure. The structural system has the advantages of high anti-seismic fortification redundancy, clear force transfer mechanism, good vertical stability, strong anti-overturning capability and the like, all the components can be prefabricated in a factory, the field assembly is simple and convenient, and the structural system has great popularization value in an assembled steel structure residential system.
Claims (7)
1. The cold-formed steel wall-arch hybrid structure system is characterized by comprising a plurality of spliced combined wall elements and a building cover (6), wherein each combined wall element comprises a column (1), arch supports (2), combined walls (3) and I-shaped beams (4), wherein the columns (1) are arranged at the left end and the right end of each combined wall (3), the I-shaped beams (4) are arranged at the upper end and the lower end of each combined wall (3), the two ends of each I-shaped beam (4) are respectively connected with the columns (1), the arch supports (2) are arranged inside cold-formed thin-wall steel frameworks (3-1) of the combined walls (3), the two ends of each arch support are respectively connected to opposite corner points where the columns (1) are connected with the I-shaped beams (4), the arch supports (2) arranged inside the adjacent four combined wall elements form a circle, the adjacent layer columns (1) are fixedly connected, the columns (1), the arch supports (2) and the I-shaped beams (4) are connected through first connecting nodes (5-1), and the columns (1) and the I-shaped beams (4) are connected with each other through second connecting nodes (5-2);
The post (1) comprises an embedded steel member (1-1), a cold-formed thick-wall steel pipe (1-2), self-compacting concrete (1-3) and embedded bolts (1-4), wherein the embedded steel member (1-1) is arranged inside the cold-formed thick-wall steel pipe (1-2), the self-compacting concrete (1-3) is filled in the middle of the cold-formed thick-wall steel pipe (1-2), meanwhile, the middle of the embedded steel member (1-1) is embedded in the self-compacting concrete (1-3), a plurality of groups of embedded bolts (1-4) are horizontally arranged in the self-compacting concrete (1-3), two ends of the embedded bolts (1-4) extend out of the side wall of the cold-formed thick-wall steel pipe (1-2), the cold-formed thick-wall steel pipe (1-2) at one end, which is not connected with the arch support (2), of the post (1) is grooved, and two end parts of the embedded steel member (1-1) and the cold-formed thick-wall steel pipe (1-2) are respectively provided with reserved bolt holes (1-5);
Adjacent layer columns (1) at the first connecting node (5-1) are connected through battens (7-2), two ends of each batten (7-2) are respectively inserted into the end parts of cold-formed thick-wall steel pipes (1-2) of the adjacent layer columns (1), and the adjacent layer columns (1) are respectively fixedly connected with the battens (7-2) by adopting split bolts (7-5 b);
Adjacent layer columns (1) at the second connecting node (5-2) are connected through a batten (7-2) and an inserting plate (7-3 c), two ends of the batten (7-2) are respectively inserted into the ends of cold-bending thick-wall steel pipes (1-2) of the adjacent layer columns (1), and the adjacent layer columns (1) are respectively fixedly connected with the batten (7-2) by adopting split bolts (7-5 b);
The arch support (2) comprises a steel joint (2-1), cold-bending thick-wall round steel pipes (2-2) and concrete (2-3), wherein the concrete (2-3) is filled in the cold-bending thick-wall round steel pipes (2-2), the steel joint (2-1) is arranged at two ends, the steel joint (2-1) comprises round steel pipes (2-1 a), a sealing plate (2-1 b) and a steel plate (2-1 c), one ends of the round steel pipes (2-1 a) are provided with sealing plates (2-1 b), the two steel plates (2-1 c) are arranged in parallel, a gap is reserved between the two ends of the cold-bending thick-wall round steel pipes (2-2), the round steel pipes (2-1 a) and the steel plates (2-1 c), and the ends of the cold-bending thick-wall round steel pipes (2-2) are connected into a whole through opposite-pulling bolts (7-5 b) after the ends of the round steel pipes (2-2 a) are inserted into the round steel pipes (2-1 a).
2. The cold-formed steel wall-arch mixed structure system according to claim 1, wherein the combined wall (3) comprises a cold-formed thin-walled steel skeleton (3-1), wall boards (3-2), heat insulation layers (3-3) and prefabricated plate units (3-5), the cold-formed thin-walled steel skeleton (3-1) comprises a plurality of groups of cold-formed thin-walled steel pipes (3-1 a) and a plurality of X-shaped steel sheets (3-1 b), the prefabricated plate units (3-5) are arranged on two sides of an arch support in pairs, one cold-formed thin-walled steel pipe (3-1 a) is arranged at the left end and the right end of each prefabricated plate unit (3-5), the cold-formed thin-walled steel pipes (3-1 a) corresponding to the two ends of each pair of prefabricated plate units (3-5) are fixedly connected through the plurality of X-shaped steel sheets (3-1 b), at least two pairs of prefabricated plate units (3-5), the heat insulation layers (3-3) and the wall boards (3-2) are arranged between the adjacent prefabricated units (3-5), and the heat insulation layers (3-3) are arranged between the two sides of the wall boards (3-2).
3. The cold-formed steel wall-arch mixed structure system according to claim 2 is characterized in that the combined wall (3) is connected with the column (1) and the I-shaped beam (4) through cold-formed angle steels (7-1) and bolts, the column (1) is connected with the side wall of the combined wall (3), the two sides of the arch-shaped support (2) are symmetrically provided with a pair of cold-formed angle steels (7-1), the I-shaped beam (4) is connected with the flange of the combined wall (3), the two sides of the arch-shaped support (2) are symmetrically provided with a pair of cold-formed angle steels (7-1), and the combined wall (3) is inlaid in the eight cold-formed angle steels (7-1) on the left column (1) and the right column (1) and the I-shaped beam (4) and is fixedly connected with the column (1) and the I-shaped beam (4) through bolts.
4. A cold-formed steel wall-arch hybrid structure according to claim 3, characterized in that the first connection node (5-1) comprises a first node plate (7-3 a) and connection pieces (7-4), the first node plate (7-3 a) is embedded in a web plate at one end of the i-beam (4) in pairs, is fixedly connected with the i-beam (4) and is fixedly connected with the side wall of the column (1) through a split bolt (7-5 b), and the steel joint (2-1) at the end of the arch support (2) is fixedly connected with the first node plate (7-3 a) through the connection pieces (7-4) arranged in pairs, and is further fixedly connected with the column (1) and the i-beam (4).
5. A cold-formed steel wall-arch hybrid structure according to claim 4, wherein the second connection node (5-2) comprises a second node plate (7-3 b) and an insertion plate (7-3 c), the second node plate (7-3 b) is embedded in pairs into a web at one end of the i-beam (4), the insertion plate (7-3 c) is inserted into a slot of a cold-formed thick-walled steel tube (1-2) of the column (1), and both ends of the insertion plate (7-3 c) are embedded between upper and lower flanges of the i-beam (4) and between the second node plate (7-3 b) and the web of the i-beam (4).
6. The cold-formed steel wall-arch hybrid structure system according to claim 5, wherein the floor (6) is embedded in the web of the top i-beam (4 b) of the composite wall element and fixedly connected with the web and lower flange of the i-beam (4 b) by bolts.
7. A method of assembling a cold-formed steel wall-arch hybrid structural system according to claim 6, comprising the steps of:
S1, assembling adjacent layer columns (1), arch supports (2) and I-shaped beams (4);
S11, inserting a batten (7-2) and an inserting plate (7-3 c) into the top end of a lower column (1 a), installing an upper column (1 b) right above the lower column (1 a), and fixedly connecting the lower column (1 a) and the upper column (1 b) through the batten (7-2) and the inserting plate (7-3 c);
only the connection part of the column (1) and the I-shaped beam (4) does not need to be provided with a plugboard (7-3 c);
S12, after the I-shaped beam (4) is arranged at the target position, the first gusset plates (7-3 a) and the second gusset plates (7-3 b) are respectively embedded into webs at two ends of the I-shaped beam (4) in pairs and are fixedly connected with the side wall of the column (1);
s13, fixing two ends of the arch support (2) on the first gusset plate (7-3 a) through the pair of connecting sheets (7-4) respectively;
s2, assembling a lower layer combined wall (3 a) and a floor (6);
S21, symmetrically arranging a pair of cold-formed angle steels (7-1) on the two sides of the arched support (2) on the side wall of the lower column (1 a) connected with the combined wall (3 a), and symmetrically arranging a pair of cold-formed angle steels (7-1) on the two sides of the arched support (2) on the upper flange of the bottom I-shaped beam (4 a);
S22, inserting the side unit (3-5 a) into a cold-formed angle steel (7-1) connected with the upper flange of the bottom I-shaped beam (4 a), sliding the side unit (3-5 a) to the lower column (1 a) along the direction of the cold-formed angle steel (7-1) and tightly attaching the side unit (3-5 a) to the side wall of the lower column (1 a), and fixedly connecting the side unit (3-5 a) with the lower column (1 a), the bottom I-shaped beam (4 a) and the cold-formed angle steel (7-1) connected with the side unit;
S23, fixedly connecting two cold-formed thin-wall steel pipes (3-1 a) which are arranged in parallel through an X-shaped steel sheet (3-1 b);
s24, installing cold-formed thin-walled steel pipes (3-1 a) and intermediate units (3-5 b) according to the designed intervals, and fixedly connecting X-shaped steel sheets (3-1 b) with the cold-formed thin-walled steel pipes (3-1 a) by adopting the same method of the step S23;
S25, installing two side wallboards (3-2) after embedding an insulating layer (3-3) between the side units (3-5 a) and the middle units (3-5 b) and between the adjacent middle units (3-5 b), and fixedly connecting the wallboards (3-2), the cold-formed thin-wall steel pipes (3-1 a) and cold-formed angle steels (7-1) of the upper flanges of the bottom I-shaped beams (4 a);
S26, one limb of the cold-formed angle steel (7-1) is fixedly connected with the lower flange of the top I-shaped beam (4 b), and the other limb of the cold-formed angle steel (7-1) is fixedly connected with the top of the wallboard (3-2);
S27, embedding the floor system (6) into the web plate of the top I-shaped beam (4 b), and fixedly connecting the web plate and the lower flange of the top I-shaped beam (4 b);
s3, assembling an upper layer combined wall (3 b);
S31, arranging cold-formed angle steels (7-1) in pairs on two sides of the arch support (2) by adopting the same method as in S2, and fixedly connecting the cold-formed angle steels (7-1) arranged along the upper column (1 b) with the side wall of the upper column (1 b);
S32, installing paired cold-formed angle steel (7-1) on the upper flange of the top I-shaped beam (4 b), and fixedly connecting the floor system (6), the upper flange of the top I-shaped beam (4 b) and the cold-formed angle steel (7-1);
S33, assembling the upper layer composite wall (3 b) by adopting the same method as the steps S22-S26.
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