CN114000589A - A Nested Bolted Connection for Large Section Members - Google Patents
A Nested Bolted Connection for Large Section Members Download PDFInfo
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- CN114000589A CN114000589A CN202111153043.XA CN202111153043A CN114000589A CN 114000589 A CN114000589 A CN 114000589A CN 202111153043 A CN202111153043 A CN 202111153043A CN 114000589 A CN114000589 A CN 114000589A
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- node
- main body
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- truss
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/08—Vaulted roofs
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- Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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Abstract
一种适用于大截面杆件的嵌套式螺栓连接节点，属于空间结构技术领域。本发明解决了现有技术中对于大截面杆件节点连接结构易造成连接刚度差，进而影响空间结构整体的承载力的问题。若干所述节点支杆均焊接在节点主体的外表面且分别与节点主体贯通设置，所述节点主体为球型结构或管型结构，节点主体的内壁加工有支承肋，节点支杆为管型结构；当节点主体为球型结构时，若干待连接的桁架杆对应嵌套安装在若干节点支杆上，且桁架杆与节点支杆之间通过若干螺栓连接；当节点主体为管型结构时，若干待连接的桁架杆对应嵌套安装在若干节点支杆上以及节点主体的两端，且桁架杆与节点支杆之间以及桁架杆与节点主体的两端之间均通过若干螺栓连接。
A nested bolt connection node suitable for large-section rods belongs to the technical field of space structures. The invention solves the problem in the prior art that the connection structure of the large-section bar node is likely to cause poor connection rigidity, thereby affecting the overall bearing capacity of the space structure. A plurality of the node struts are welded on the outer surface of the node body and are respectively arranged through the node body, the node body is a spherical structure or a tubular structure, the inner wall of the node body is processed with support ribs, and the node struts are tubular structure; when the main body of the node is a spherical structure, a number of truss rods to be connected are nested and installed on a number of node struts, and the truss rods and the node struts are connected by several bolts; when the main body of the node is a tubular structure A number of truss rods to be connected are correspondingly nested and installed on several node struts and both ends of the node body, and the truss rods and the node struts and between the truss rods and the two ends of the node body are connected by several bolts.
Description
Technical Field
The invention relates to a nested bolt connecting node suitable for a large-section rod piece, and belongs to the technical field of space structures.
Background
The concept of the ultra-large span city dome is proposed in 2014, which is to cover the ultra-large dome in a part of areas to isolate the external environment so as to deal with the threat of environmental change to the city, the requirements of energy conservation and emission reduction, and the conception of polar scientific investigation and the construction of the space city. Among many urban dome structure solutions, the giant lattice structure is considered as an ideal space structure system. The three-dimensional truss structure consists of a three-dimensional truss main structure and a plurality of flat plate net racks or single-layer net shell substructures, has definite force transmission paths and high material utilization rate, and is a relatively high-efficiency structural system. Compared with the traditional giant grid structure adopting steel, the aluminum alloy has the specific stiffness equivalent to that of steel and higher specific strength, and when the aluminum alloy is used for the giant grid structure, the structural strength and the rigidity can be ensured, and the self weight and the initial construction cost of the structure can be effectively reduced. In addition, the aluminum alloy has the characteristics of corrosion resistance, good low-temperature performance, no magnetism and the like, can be more suitable for coastal and polar areas and environments with nonmagnetic requirements, and can save the maintenance cost during the service period of the structure.
The node connects each part of the rod in the space structure, which is an important component of the structure. The node form determines the construction mode, and the node performance influences the integral stress performance of the structure. Because the strength of the aluminum alloy structure after welding is reduced, a welding connection mode is not generally adopted, such as a ball joint and a pipe joint which are suitable for the lower chord corner of the steel truss and disclosed by the publication numbers of CN212271245U and CN 212271208U. In the present aluminum alloy spatial structure, four types of nodes are generally adopted, and the four types of nodes are respectively: plate (disc) joints, bolt-ball joints, hub joints, and cast aluminum joints. For the main structural part of the aluminum alloy huge grid structure (as shown in fig. 9), aluminum alloy circular tubes or square tubes are generally used as the rods. The cross section of the rod piece also exceeds the conventional size due to the structure span exceeding the conventional space structure. The spatial directionality of the giant grid structure rod pieces is various, no node form suitable for the giant grid structure rod pieces exists at present, and the conventional connection node structure is adopted, so that the node connection rigidity is poor, and the integral bearing capacity of the spatial structure is influenced.
Disclosure of Invention
The invention aims to solve the problem that the connection rigidity of a large-section rod piece node connection structure is poor and further the integral bearing capacity of a space structure is influenced in the prior art, and further provides a nested bolt connection node suitable for a large-section rod piece.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a nested bolted connection node suitable for a large-section rod piece comprises a node main body and a plurality of node supporting rods, wherein the plurality of node supporting rods are welded on the outer surface of the node main body and are respectively communicated with the node main body;
when the node main body is of a spherical structure, a plurality of truss rods to be connected are correspondingly nested and installed on a plurality of node supporting rods, and the truss rods are connected with the node supporting rods through a plurality of bolts;
when the node main body is of a tubular structure, a plurality of truss rods to be connected are correspondingly nested and installed on the plurality of node supporting rods and at two ends of the node main body, and the truss rods are connected with the node supporting rods and the truss rods are connected with two ends of the node main body through a plurality of bolts.
Furthermore, a reinforcing plate is sleeved outside the nesting position between the truss rod and the node support rod and/or outside the nesting position between the truss rod and the two ends of the node main body.
Furthermore, a plurality of bolts used for connecting the node supporting rods on each truss rod and a plurality of bolts used for connecting the end parts of the node main bodies on each truss rod are arranged in at least two rows, and each row of bolts are uniformly distributed along the circumferential direction of the truss rods.
Further, when the node main body is a pipe type structure, the number of the supporting ribs is at least two and arranged side by side along the length direction of the pipe type node main body.
Furthermore, the supporting rib is of an annular structure and is integrally and coaxially fixedly arranged on the inner wall of the tubular node main body.
Furthermore, when the node main body is of a spherical structure, the interior of the node main body is of a hollow structure.
Further, the number of the supporting ribs is at least two and the supporting ribs are arranged on the inner wall of the spherical node main body in a crossing mode.
Furthermore, the supporting ribs are of annular structures, and the circle centers of the supporting ribs are overlapped with the sphere center of the spherical node main body.
Further, the bolt is a one-way bolt.
Furthermore, when the node main body is of a spherical structure, a plurality of long holes are formed in one end part, connected with the truss rod, of each node supporting rod along the circumferential direction of the node supporting rod, and a plurality of bolts correspondingly penetrate through the plurality of long holes; when the node main part is the cast structure, a plurality of slot holes have all been seted up along circumference on the both ends of node main part and the one end of being connected with the truss pole on every node branch, and a plurality of bolts correspond and pass a plurality of slot holes.
Compared with the prior art, the invention has the following effects:
the application is suitable for a three-dimensional truss structure, and the quantity and the position of the truss rods connected by each connecting node are relatively flexible.
The node area made of stainless steel can avoid electrochemical corrosion of the joint with the aluminum alloy rod piece, and the reliability of the joint is ensured. Meanwhile, the stainless steel is adopted to be connected with the node supporting rod at the junction of the node main body and the node supporting rod in a welding mode, so that the node is simple in structure and convenient to construct.
By providing support ribs inside the node body, local instability of the node body is prevented. The number of support ribs may be selected based on the actual basic truss connection configuration to prevent the node body from backing out of service prior to localized buckling at the connection while ensuring reliability at the connection.
The connection node structure can be applied to connection of aluminum alloy giant grid structures and other large-diameter aluminum alloy structural rod pieces, and fills the blank of the connection space structural form of the nodes.
Drawings
FIG. 1 is a schematic view of a node body in partial section when the node body is a ball-type structure;
FIG. 2 is a schematic perspective view of a node body having a spherical structure;
FIG. 3 is a schematic view in partial section of the node body in a tubular configuration;
FIG. 4 is a schematic perspective view of the node body having a tubular structure;
FIG. 5 is a semi-sectional schematic view when the node body is a tubular structure and the number of support ribs is one;
FIG. 6 is a schematic semi-sectional view when the node body is a tubular structure and the number of support ribs is two;
FIG. 7 is a schematic semi-sectional view when the node body is a ball-type structure and the number of support ribs is four;
FIG. 8 is a schematic view of a connection node with reinforcing plates (when the node body is a tubular structure);
FIG. 9 is a schematic view of the main structure of the giant lattice structure;
FIG. 10 is an enlarged view taken at A in FIG. 9;
FIG. 11 is an enlarged view of a portion of FIG. 10 at C;
fig. 12 is a schematic diagram of a node installation explosion.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 12, and the nested bolted connection node suitable for a large-section rod piece comprises a node main body 3 and a plurality of node supporting rods 4, wherein the plurality of node supporting rods 4 are welded on the outer surface of the node main body 3 and are respectively communicated with the node main body 3, the node main body 3 is of a spherical structure or a tubular structure, supporting ribs 5 are machined on the inner wall of the node main body 3, and the node supporting rods 4 are of a tubular structure;
when the node main body 3 is of a spherical structure, a plurality of truss rods 1 to be connected are correspondingly nested and installed on a plurality of node supporting rods 4, and the truss rods 1 are connected with the node supporting rods 4 through a plurality of bolts 2;
when the node main body 3 is of a tubular structure, a plurality of truss rods 1 to be connected are correspondingly nested and installed on a plurality of node supporting rods 4 and at two ends of the node main body 3, and the truss rods 1 and the node supporting rods 4 and the truss rods 1 and the two ends of the node main body 3 are connected through a plurality of bolts 2.
The node area made of stainless steel can avoid electrochemical corrosion of the joint with the aluminum alloy rod piece, and the reliability of the joint is ensured. Meanwhile, the stainless steel is adopted, so that the welding connection can be used at the intersection of the node main body 3 and the node supporting rod 4, the node structure is simple, and the construction is convenient.
By providing the support ribs 5 inside the node main body 3, local buckling of the node main body 3 is prevented. The number of the supporting ribs 5 may be selected according to the actual basic truss connection structure to prevent the node main body 3 from withdrawing before the joint is partially bent while ensuring the reliability of the joint. The number of the support ribs 5 is at least one.
Axial force, bending moment and the like in the truss rod 1 are mainly transmitted to the connecting node by the shearing force of the bolt 2.
At the joint of each rod piece and the connecting node, the number of turns of the bolts 2, the number of the bolts 2 in each turn and the opposite or staggered arrangement mode of the bolts 2 in two adjacent turns can select proper parameters according to the stress condition of the structure. The bolt 2 can exert a small pretension force and should not be too high.
The application is suitable for a three-dimensional truss structure, and the quantity and the orientation of the truss rods 1 connected by each connecting node are relatively flexible.
When the node main body 3 adopts a tubular structure, the material consumption can be effectively saved, and the node main body is mainly used for connecting chords and web members of a three-dimensional truss in a structure, as shown in a structure B in fig. 10;
when the node main body 3 adopts a spherical structure, the structure is preferably a hollow spherical structure, and can be suitable for connection of truss rods 1 in more directions in space, and the node main body is mainly used for connecting each rod piece of a hexagonal pyramid at a three-dimensional truss junction in a structure, as shown in a structure D in fig. 11.
The number and the azimuth of the rods connected to the two types of node bodies 3 vary according to the actual structure.
The connection node structure can be applied to connection of an aluminum alloy giant grid structure and other large-diameter aluminum alloy structural rod pieces, and fills the blank of the connection space structural form of the node;
the connecting node has a simple structural form, a definite and reasonable force transmission mode and reliable stress performance.
And a reinforcing plate 7 is further sleeved outside the nesting position between the truss rod 1 and the node strut 4 and/or outside the nesting position between the truss rod 1 and the two ends of the node main body 3. Because the holes of the bolts 2 are formed in the rod piece, the cross section of the rod piece is weakened, and when the bearing capacity requirement cannot be met, the bearing capacity of the connecting node is further enhanced by additionally arranging the reinforcing plate 7.
A plurality of bolts 2 used for connecting the node supporting rod 4 on each truss rod 1 and a plurality of bolts 2 used for connecting the end part of the node main body 3 on each truss rod 1 are at least arranged in double rows, and each row of bolts 2 are uniformly distributed along the circumference of each truss rod 1.
When the node main body 3 is a pipe type structure, the number of the support ribs 5 is at least two and arranged side by side along the length direction of the pipe type node main body 3.
The supporting rib 5 is of an annular structure and is integrally and coaxially fixedly arranged on the inner wall of the tubular node main body 3.
When the node main body 3 is of a spherical structure, the interior of the node main body is of a hollow structure.
The number of the supporting ribs 5 is at least two and the supporting ribs are arranged on the inner wall of the spherical node main body 3 in a crossing way.
The supporting ribs 5 are of annular structures, and the circle centers of the supporting ribs are overlapped with the sphere center of the spherical node main body 3.
The bolt 2 is a one-way bolt. The one-way bolt is also called a unilateral bolt or a blind hole bolt. Because the tubular structure generally is the closed cross-section such as pipe or square pipe, adopts one-way bolt can carry out the installation and the fastening work of bolt 2 in the outside, need not to open the hole in addition on the member, the work load that can significantly reduce the field installation has increased substantially field construction efficiency and speed, has saved artifically, has avoided field welding work simultaneously. The unidirectional bolts can be of various types, and are commonly used in Hollo-Bolt, BOM, Ajax Oneside, derivatives or modifications thereof, or some domestic unidirectional bolts. And selecting a proper one-way bolt type according to engineering conditions.
When the node main body 3 is of a spherical structure, a plurality of long holes 6 are formed in one end part, connected with the truss rod 1, of each node support rod 4 along the circumferential direction of the node support rod, and a plurality of bolts 2 correspondingly penetrate through the plurality of long holes 6; when the node main body 3 is a tubular structure, a plurality of long holes 6 are formed in the two end portions of the node main body 3 and one end portion, connected with the truss rod 1, of each node supporting rod 4 in the circumferential direction, and a plurality of bolts 2 correspondingly penetrate through the long holes 6. Through set up slot hole 6 on node main part 3 and/or node branch 4 for the regulation of truss rod 1 position during the installation avoids appearing because of truss rod 1 initial defect that initial bending, temperature variation etc. arouse, and then the problem that bolt 2 that causes can not twist in or false twist. Taking the node main body as a tubular structure as an example, the installation process of the connection node is described with reference to fig. 12: during installation, the E end of the truss rod is nested with one end of the corresponding node main body, so that the long hole is initially aligned with the truss rod bolt hole; then the bolt is screwed into the truss rod bolt hole and the long hole, and the bolt is not locked temporarily. And then nesting the F end of the truss rod with the other end of the corresponding node main body, adjusting the relative positions of the bolt hole at the E end and the long hole, aligning the bolt hole at the F end with the long hole and screwing in a bolt. And finally, screwing the bolts at the two ends to finish the installation.
Claims (10)
1. The utility model provides a nested formula bolted connection node suitable for large cross section member, its characterized in that: the node comprises a node main body (3) and a plurality of node supporting rods (4), wherein the node supporting rods (4) are welded on the outer surface of the node main body (3) and are respectively communicated with the node main body (3), the node main body (3) is of a spherical structure or a tubular structure, supporting ribs (5) are machined on the inner wall of the node main body (3), and the node supporting rods (4) are of tubular structures;
when the node main body (3) is of a spherical structure, a plurality of truss rods (1) to be connected are correspondingly nested and installed on a plurality of node supporting rods (4), and the truss rods (1) are connected with the node supporting rods (4) through a plurality of bolts (2);
when the node main body (3) is of a tubular structure, a plurality of truss rods (1) to be connected are correspondingly nested and installed on the plurality of node supporting rods (4) and at two ends of the node main body (3), and the truss rods (1) and the node supporting rods (4) and the truss rods (1) and the two ends of the node main body (3) are connected through a plurality of bolts (2).
2. The nested bolted connection node suitable for large-section bars according to claim 1, characterized in that: a reinforcing plate (7) is sleeved outside the nesting position between the truss rod (1) and the node support rod (4) and/or outside the nesting position between the truss rod (1) and the two ends of the node main body (3).
3. A nested bolted joint suitable for large section bars according to claim 1 or 2, characterized in that: a plurality of bolts (2) used for being connected with the node supporting rods (4) on each truss rod (1) and a plurality of bolts (2) used for being connected with the end parts of the node main bodies (3) on each truss rod (1) are arranged in at least two rows, and each row of bolts (2) are uniformly distributed along the circumferential direction of the truss rod (1).
4. The nested bolted connection node suitable for large-section bars according to claim 1, characterized in that: when the node main body (3) is of a tubular structure, the number of the supporting ribs (5) is at least two and the supporting ribs are arranged side by side along the length direction of the tubular node main body (3).
5. The nested bolted connection node suitable for large-section bars according to claim 4, characterized in that: the supporting ribs (5) are of annular structures and are integrally and coaxially fixedly arranged on the inner wall of the tubular joint main body (3).
6. The nested bolted connection node suitable for large-section bars according to claim 1, characterized in that: when the node main body (3) is of a spherical structure, the interior of the node main body is of a hollow structure.
7. The nested bolted connection node suitable for large-section bars according to claim 6, characterized in that: the number of the supporting ribs (5) is at least two and the supporting ribs are arranged on the inner wall of the spherical node main body (3) in a crossed mode.
8. A nested bolted connection node adapted for large section bars according to claim 6 or 7, characterized in that: the supporting ribs (5) are of an annular structure, and the circle centers of the supporting ribs are overlapped with the sphere center of the spherical node main body (3).
9. A nested bolted connection node adapted for large section bars according to claim 1, 2, 4, 5, 6 or 7, characterized in that: the bolt (2) is a one-way bolt.
10. The nested bolted connection node suitable for large-section bars according to claim 1, characterized in that: when the node main body (3) is of a spherical structure, a plurality of long holes (6) are formed in one end part, connected with the truss rod (1), of each node supporting rod (4) along the circumferential direction of the node supporting rod, and a plurality of bolts (2) correspondingly penetrate through the plurality of long holes (6); when node main part (3) are the cast structure, a plurality of slot holes (6) have all been seted up along circumference to the tip of being connected with truss pole (1) on the both ends of node main part (3) and every node branch (4), and a plurality of bolts (2) correspond and pass a plurality of slot holes (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153043.XA CN114000589A (en) | 2021-09-29 | 2021-09-29 | A Nested Bolted Connection for Large Section Members |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111153043.XA CN114000589A (en) | 2021-09-29 | 2021-09-29 | A Nested Bolted Connection for Large Section Members |
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| Publication Number | Publication Date |
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| CN114000589A true CN114000589A (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111153043.XA Pending CN114000589A (en) | 2021-09-29 | 2021-09-29 | A Nested Bolted Connection for Large Section Members |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115897800A (en) * | 2022-12-29 | 2023-04-04 | 常州工学院 | Hollow ribbed combined node |
| CN118621900A (en) * | 2024-08-13 | 2024-09-10 | 山西六建集团有限公司 | A reinforcement structure for assembled welded hollow spherical node and its use method |
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| CN115897800A (en) * | 2022-12-29 | 2023-04-04 | 常州工学院 | Hollow ribbed combined node |
| CN118621900A (en) * | 2024-08-13 | 2024-09-10 | 山西六建集团有限公司 | A reinforcement structure for assembled welded hollow spherical node and its use method |
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