CN109024881A - Self-resetting can assemble multistage beam accentric support steel frame after shake - Google Patents

Abstract

The invention discloses Self-resettings after shake can assemble multistage beam accentric support steel frame, and steel I-beam is connect by web-angle and boom angle with various forms of Special-Shaped Columns, forms the type of attachment of the full bolt of no-welding-seam；The middle part I-beam is connect with end I-beam by web connecting plate and high-strength silicane rubber plate, is formed the strong no-welding-seam of good working ductility, energy-dissipating property and is bolted form entirely；Prestressed cable is applied to I-beam in the middle part of the full bolt of no-welding-seam and end I-beam junction, Self-resetting node after prestressing force shakes is formed, precast concrete-profiled steel sheet combination floor is assembled after being sequentially connected each node or casting concrete floor constitutes Self-resetting after shaking and can assemble multistage beam accentric support steel frame structural system.

Description

Self-resetting post-earthquake self-assembled multi-segment beam eccentrically supported steel frame

technical field

The invention relates to a post-earthquake self-resettable multi-segment beam eccentrically supported steel frame, which belongs to the technical field of earthquake prevention and disaster reduction.

Background technique

Japan's steel structure houses account for more than 60% of all houses. Multiple earthquakes have proved that steel structure buildings have greatly improved seismic performance compared with reinforced concrete buildings, and the difficulty of post-earthquake repairs has been greatly reduced. Therefore, my country's vigorous development of steel structure buildings is the only way to improve the quality of residential housing in our country, especially the form of steel structure with high technological content should be paid more attention to and developed.

my country's steel structure prestressing technology has developed rapidly, and the most representative one is the Beijing University of Technology Gymnasium. There are innovative researches on the innovation of stress steel structure system. However, in the frame structure system, especially the application of prestressing technology at local joints is rarely studied, and the depth is far from enough.

High-strength tear-resistant silicone rubber is a special synthetic rubber with excellent high and low temperature resistance, stable chemical properties, fire prevention, and non-toxic characteristics, especially its tear resistance and tensile strength compared with traditional natural rubber It has been greatly improved, and its tensile strength can reach 2000N/CM ² . It is widely used in the fields of national defense industry, aviation, space navigation, electrical appliances, medical equipment, etc., but it is still blank in the application of building structures, but its own high strength , high expansion rate and its fire-proof and non-toxic properties meet the requirements of building structures for civil engineering materials, and we should actively explore ways to use them to give full play to their excellent performance.

Contents of the invention

The invention provides a post-earthquake self-resettable multi-segment beam eccentrically supported steel frame belonging to the technical field of earthquake prevention and disaster reduction. Its purpose is to improve the ductility performance of the frame structure and then improve the seismic performance of the structure, reduce the difficulty of post-earthquake repair and maintenance costs, shorten the construction period, and reduce labor costs. The post-earthquake self-resetting assembleable multi-segment beam eccentrically supported steel frame basically consists of frame columns, node beams, intermediate beams, prestressed cables, beam-column node connectors, and beam-beam connectors. Construction sequence: first install the beam-column joints, and then install the beam-beam joints. The specific structure is that during the construction process, first install the top and bottom angle steel at the beam-column joint, and then install the I-beam web angle steel at the beam-column joint. After the beam-column joint is installed, install the beam-beam joint: first install the web Then install the top and bottom high-strength tear-resistant silicone rubber plates and sealing plates, and finally install and stretch the high-strength prestressed cables. This kind of precompressive stress will provide greater resistance to bending moment for beam-to-beam joints, greatly improving the connection strength, and the web connection plate at beam-to-beam joints effectively increases the thickness of the web to provide greater shear resistance for beam-to-beam joints force.

After the earthquake, the basic principle of self-resetting and assembling multi-segment beam eccentrically supported steel frame: when the earthquake action reaches the moderate earthquake level, the beam-beam contact surface opens first, and the high-strength silicone rubber deforms greatly and consumes seismic energy, thus avoiding the beam-column damage to main components. After the earthquake, the structure returns to the pre-earthquake position under the action of the pretension force of the prestressed cable and the contraction force of the high-strength silicone rubber. Studies have shown that the combination of high-strength silicone rubber and prestressed cables at the beam-beam joint can reach the strength of welding under normal working conditions, and the deflection generated during use is less than the maximum deflection specified in the code; under earthquake action, the high-strength Silicone rubber and prestressed cables can exert their excellent expansion and contraction properties, absorb earthquake energy, and then protect the beam-column joints, which conforms to the design concepts of "strong nodes, weak components" and "strong columns and weak beams".

The application of prestressed cables and high-strength silicone rubber enables the steel frame structure to obtain better seismic performance and higher safety factor. The main advantages of the post-earthquake self-resetting and assembling multi-segment beam eccentrically supported steel frame: (1) The organic combination of new technology and new materials makes the steel frame have better seismic performance, and the application of prestressing technology greatly reduces the difficulty of post-earthquake repair. When the displacement angle is small, the present invention can utilize the elastic shrinkage ability of the prestressed cable and high-strength silicone rubber to realize self-resetting without repairing; The deflection is less than the maximum deflection specified in the code; (3) It is mainly connected by high-strength bolts. There is no welding work on the construction site, and there is no wet operation of traditional concrete structures. Poor weld quality caused by poor quality, poor welding materials, rush to work and other reasons lead to structural quality and safety accidents; (4) The full bolt connection can realize factory manufacturing and assembly construction of building structures, greatly reducing Construction period cost and labor cost.

The technical solution adopted in the present invention is self-resetting after the earthquake, which can be assembled with multi-segment beam eccentric support steel frame, and the I-beam is connected with different forms of special-shaped columns through the web angle steel and flange angle steel, forming a connection form with no welds and full bolts The I-beam in the middle and the I-beam at the end are connected through the web connecting plate and the high-strength silicon rubber plate to form a non-welded full-bolt connection form with good ductility and strong energy dissipation performance; Prestressed steel cables are applied to the connection between the I-beam and the end I-beam to form a prestressed self-resetting node after an earthquake. After connecting each node and eccentric support in turn, assemble the prefabricated concrete-profiled steel composite floor or the poured concrete floor to assemble the eccentric The supporting components finally constitute a self-resetting post-earthquake assembling multi-segment beam eccentrically supported steel frame structure system;

Special-shaped columns are divided into L-shaped columns 1, T-shaped columns 2 and cross-shaped columns 3;

Depending on the location, the node form includes three specifications, namely L-shaped connection, T-shaped connection, and cross-shaped connection;

The cross-shaped node connection is the connection between the cross-shaped column 3 and the end I-beam 4 . Specific connection steps: the hoisting equipment makes the end I-beam 4 and the cross-shaped column 3 vertically and closely contacted, and the web angle steel 5 is used as a connecting piece to connect the end I-beam 4 and the cross-shaped column 3 with high-strength bolts. The installation process It is necessary to ensure that the end I-beam 4 is perpendicular to the cross-shaped column 3, and then install the flange angle steel 6 with high-strength bolts to increase the rotational stiffness at the beam-column node to achieve the effect of consolidation;

The connection steps of the middle I-beam 7 and the end I-beam 4: the hoisting equipment will contact the middle I-beam 7 and the end I-beam 4 on the same horizontal plane, and the web connecting plate 8 is used as the connecting piece of the two sections of beams Connect the middle I-beam 7 and the end I-beam 4 together with high-strength bolts, and then install the high-strength silicone rubber plate 9 and the sealing plate 10 with high-strength bolts;

The L-shaped node connection form, the T-shaped node connection form and the cross-shaped node connection form are basically the same. Only the special-shaped columns adopt L-shaped column 1 and T-shaped column 2 respectively; the L-shaped joint connection is the connection between the frame corner frame column and the end I-beam 4; the T-shaped joint connection is the frame side frame column 2 and the end I-beam 4 connections; the cross-shaped node connection is the connection between the cross-shaped column 3 and the end I-beam 4 .

Arrangement of node prestress: pass the prestressed cable 11 sequentially through the holes reserved on the I-beam reinforcement 12, apply the calculated prestress value, and anchor to the I-beam reinforcement 12 with permanent anchors.

The eccentric support includes a herringbone anti-lateral force component, a V-shaped anti-lateral force component and a single support anti-lateral force component. Diagonal brace 15 is composed of; cantilever rod I 13 is bolted to the middle I-beam 7 through a steel backing plate, and diagonal bracing 15 and cantilever rod I13 are connected with bolts through a cover plate; cantilever rod II 14 is bolted to the On the node of the frame column and the end I-beam 4, the diagonal brace 15 and the cantilever rod II 14 are connected by bolts through the cover plate.

The single support anti-lateral force member is composed of cantilever rod I13 and support 15, the cantilever rod I13 is connected to the end I-beam 4 by bolts through the steel backing plate, and the diagonal brace 15 and the cantilever rod I13 are connected by bolts through the cover plate; The cross-section of the diagonal brace is double-angle steel, H-shaped steel, or I-shaped steel, double-channel steel composite cross-section, double-angle steel composite cross-section; the diagonal brace is an ordinary high-strength steel strip, or buckling-resistant energy-dissipating support or energy-dissipating damping device support.

The prefabricated concrete-profiled steel composite floor slab is adopted, the concrete slab 17 can be poured in the factory, and the profiled steel plate 16 can be poured as a whole as a bottom form, and can also be cast in-situ at the construction site;

After being installed step by step, the frame structure system is formed, and the floor slab is made of prefabricated concrete-profiled steel plate composite floor slab.

The beneficial effect of the present invention is that, in the post-earthquake self-resettable multi-segment beam eccentrically supported steel frame, the beams used are all I-shaped steel beams, which are easy to obtain materials, and the abdominal space of the I-shaped beams is relatively large, which is convenient for pipelines to pass through. However, the net height of the room is effectively increased.

The post-earthquake self-resetting can be assembled with a multi-segment beam eccentrically supported steel frame. The energy dissipation position is the beam-beam joint, and this position is elastically designed, which not only meets the design requirements of "strong nodes, weak components", but also ensures the integrity of structural components. Safe, with a flexible design to resist high-intensity earthquakes; there is no welding in the installation process, and all mechanically installed high-strength bolts are used to effectively ensure the construction quality and reduce environmental pollution; because the invention adopts the full bolt connection method, when the building is demolished , the bolts can be loosened, the components can be removed one by one, the steel can be efficiently recycled, the generation of construction waste can be reduced, and the concept of green environmental protection is truly realized. Therefore, the present invention is a steel structure with good seismic performance, environmental protection and sustainable development node.

The post-earthquake self-resetting can be assembled with a multi-segment beam eccentrically supported steel frame, and the prestressing technology is applied to the beam-beam connection, which realizes the self-resetting of post-earthquake structural members, greatly reduces post-earthquake repair costs; improves the beam-column joints Seismic performance, thereby improving the seismic performance of the frame structure system.

The post-earthquake self-resettable multi-segment beam eccentrically supported steel frame solves the current situation of weak joints in traditional steel structures, and gives full play to the advantages of good ductility of steel structures. Compared with traditional steel structure building nodes, it has many advantages such as good seismic performance, less environmental pollution, fewer safety accidents and less difficulty in repairing.

Description of drawings

Fig. 1 is a schematic diagram of an L-shaped column, a T-shaped column, and a cross-shaped column of the present invention.

Fig. 2 is a schematic diagram of splitting beam-column joints of the present invention.

Fig. 3 is a disassembled schematic diagram of the beam-to-beam connection of the present invention.

Fig. 4 is a schematic diagram of the overall disassembly of the framework nodes of the present invention.

Fig. 5 is a schematic diagram of an L-shaped node in the present invention.

Fig. 6 is a schematic diagram of a T-shaped node in the present invention.

Fig. 7 is a schematic diagram of a cross-shaped node of the present invention.

Fig. 8 is a schematic diagram of the herringbone eccentrically supported steel frame of the present invention.

Fig. 9 is a schematic diagram of the V-shaped eccentrically supported steel frame of the present invention.

Fig. 10 is a schematic diagram of a single eccentrically supported steel frame of the present invention.

Fig. 11 is a schematic diagram of the precast concrete-profiled steel plate composite floor of the present invention.

Fig. 12 is a schematic diagram of the eccentric support frame structure system of the present invention.

In the figure 1. L-shaped column, 2. T-shaped column, 3. Cross-shaped column, 4. End I-beam, 5. Web angle steel, 6. Flange angle steel, 7. Middle I-beam, 8. Web Plate connecting plate, 9. High-strength silicone rubber plate, 10. Sealing plate, 11. Prestressed cable, 12. I-beam reinforcement, 13. Cantilever rod I, 14. Cantilever rod II, 15. Diagonal brace, 16. Compression Type steel plate, 17. Concrete slab.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in accompanying drawing 1, in the post-earthquake self-resettable multi-segment beam eccentrically supported steel frame of the present invention, the involved special-shaped columns are: L-shaped column 1, T-shaped column 2, and cross-shaped column 3;

As shown in accompanying drawing 2, the post-earthquake self-resettable multi-segment beam eccentrically supported steel frame of the present invention mainly includes L-shaped, T-shaped, and cross-shaped joints, and the cross-shaped joints are taken as an example to be split in the figure , the cross-shaped node connection is the connection between the cross-shaped column 3 and the end I-beam 4 . Specific connection steps: the hoisting equipment makes the end I-beam 4 and the cross-shaped column 3 vertically and closely contacted, and the web angle steel 5 is used as a connecting piece to connect the end I-beam 4 and the cross-shaped column 3 with high-strength bolts. The installation process It is necessary to ensure that the end I-beam 4 is perpendicular to the cross-shaped column 3, and then install the flange angle steel 6 with high-strength bolts to increase the rotational stiffness at the beam-column node to achieve the effect of consolidation;

As shown in accompanying drawing 3, in the post-earthquake self-resettable multi-section beam eccentrically supported steel frame of the present invention, the connection steps of the middle I-beam 7 and the end I-beam 4: hoisting equipment connects the middle I-beam 7 and the end I-beam 4 The end I-beam 4 is in contact with and on the same level, and the web connection plate 8 is used as a connecting piece of the two-section beams to connect the middle I-beam 7 and the end I-beam 4 with high-strength bolts, and then install them with high-strength bolts High-strength silicone rubber plate 9 and sealing plate 10;

As shown in Figure 4, in the post-earthquake self-resettable multi-segment beam eccentrically supported steel frame of the present invention, the joint connection is divided into two parts, one is the beam-column connection, and the other part is the middle I-beam 7 and the end I-beam Beam 4 connection;

As shown in accompanying drawings 5-7, in the post-earthquake self-resetting assembleable multi-segment beam eccentrically supported steel frame of the present invention, there are three types of joints, which are L-shaped, T-shaped, and cross-shaped;

As shown in accompanying drawings 8-9, in the post-earthquake self-resetting multi-segment beam eccentrically supported steel frame of the present invention, its herringbone and V-shaped anti-lateral force members are composed of cantilever rod I13, cantilever rod II14 and diagonal brace 15 Composition; the cantilever rod I13 is bolted to the middle I-beam through the steel backing plate, the diagonal brace 15 and the cantilever rod I13 are connected with bolts through the cover plate; the cantilever rod II14 is connected to the frame column and the end work by bolts through the steel backing plate On the node of the word beam, the diagonal brace 15 and the cantilever rod II14 are connected by bolts through the cover plate;

As shown in accompanying drawing 10, in the post-earthquake self-resettable multi-segment beam eccentrically supported steel frame of the present invention, its single support anti-lateral force member is composed of a cantilever rod I13 and a support 15, and the cantilever rod I13 passes through a steel backing plate Connect to the end I-beam with bolts, and the diagonal brace 15 and the cantilever rod I13 are connected by bolts through the cover plate; the cross-section of the diagonal brace 15 is double angle steel, H-shaped steel, or I-shaped steel, double channel Angle steel combined section; the diagonal brace is an ordinary high-strength steel strip, or is supported by an anti-buckling energy-dissipating support or an energy-dissipating damper; this embodiment is described by taking an ordinary high-strength double-angle steel strip as an example;

As shown in Figure 11, in the eccentrically supported steel frame of multi-segment beams that can be assembled with self-resetting after earthquakes according to the present invention, a prefabricated concrete-profiled steel plate composite floor slab is used, and the concrete slab can be poured in the factory, and the profiled steel plate is used as a bottom form for pouring As a whole, it can also be cast in-situ at the construction site;

As shown in Figure 12, in the post-earthquake self-resetting multi-segment beam eccentrically supported steel frame that can be assembled according to the present invention, the eccentrically supported frame structure system is formed after step-by-step installation according to the above installation steps, and the floor slab uses precast concrete-profiled steel composite floor slab .

Claims (5)

1. After the earthquake, self-resetting can be assembled with multi-segment beam eccentrically supported steel frame; its characteristics are: the I-shaped steel beam passes through the web angle steel and flange angle steel; it is connected with different types of special-shaped columns; it forms a connection form of no welds and full bolts; The middle I-beam and the end I-beam are connected through a web connecting plate and a high-strength silicon rubber plate; a non-welded full-bolt connection form with good ductility and strong energy dissipation performance is formed; Apply prestressed steel cables to the connection between the beam and the end I-beam; form prestressed self-resetting nodes after an earthquake; connect each node and eccentric support in turn; assemble prefabricated concrete-profiled steel composite floor or poured concrete floor to assemble eccentric support Components; finally constitute a post-earthquake self-resettable multi-segment beam eccentrically supported steel frame structure system; Special-shaped columns are divided into L-shaped columns (1), T-shaped columns (2) and cross-shaped columns (3); Depending on the location; the node form includes three specifications: L-shaped connection; T-shaped connection; cross-shaped connection; The cross-shaped node connection is the connection between the cross-shaped column (3) and the end I-beam (4); specific connection steps: the lifting equipment vertically and closely contacts the end I-beam (4) and the cross-shaped column (3); The web angle steel (5) is used as a connecting piece to connect the end I-beam (4) with the cross-shaped column (3) as a whole; during the installation process, it must be ensured that the end I-beam (4) is perpendicular to the cross-shaped column (3); then install the flange angle steel (6) with high-strength bolts to increase the rotational stiffness at the beam-column node; to achieve the effect of consolidation; The connection steps of the middle I-beam (7) and the end I-beam (4): the hoisting equipment will contact the middle I-beam (7) and the end I-beam (4) on the same horizontal plane; the web connecting plate 8 Connect the middle I-beam (7) and the end I-beam (4) together with high-strength bolts as the connecting piece of the two-section beam; then install the high-strength silicone rubber plate (9) and sealing plate (10) with high-strength bolts ; The L-shaped node connection form and the T-shaped node connection form are the same as the cross-shaped node connection form; only the special-shaped columns adopt the L-shaped column (1) and the T-shaped column (2); the L-shaped node connection is the L-shaped column (1 ) is connected with the end I-beam (4); the T-shaped node connection is the connection between the T-shaped column (2) and the end I-beam (4); the cross-shaped node connection is the cross-shaped column (3) and the end I-beam Beam (4) connection; Arrangement of node prestress: pass the prestressed cables (11) sequentially through the holes reserved on the I-beam reinforcement (12); apply the calculated prestress value; use permanent anchors to anchor the I-beam reinforcement (12) on; The eccentric support includes a herringbone anti-lateral force member, a V-shaped anti-lateral force member and a single support anti-lateral force member. 2. self-resetting after the earthquake according to claim 1 can assemble multi-section beam eccentric support steel frame; It is characterized in that: herringbone anti-lateral force member, V-shaped anti-lateral force member are all made of cantilever rod 1 (13), cantilever rod II (14) and diagonal brace (15); the cantilever rod I (13) is bolted to the middle I-beam (7) through a steel backing plate; the diagonal brace (15) and cantilever rod I (13) pass through the cover plate Connect with bolts; the cantilever rod II (14) is bolted to the node of the frame column and the end I-beam (4) through the steel backing plate; the diagonal brace (15) and the cantilever rod II (14) are bolted through the cover plate connect. 3. self-resetting after the earthquake according to claim 1 can assemble multi-segment beam eccentric support steel frame; It is characterized in that: single support lateral force member is made up of cantilever rod I13 and support (15); Cantilever rod I (13) Bolted on the end I-beam (4) through the steel backing plate; the diagonal brace (15) and the cantilever rod I (13) are bolted through the cover plate; the cross-section form of the diagonal brace is double angle steel; H-shaped steel; or use I-shaped steel, double-channel steel composite section, double-angle steel composite section; the diagonal brace is an ordinary high-strength steel strip; or it is supported by an anti-buckling energy-dissipating support or an energy-dissipating damper. 4. The post-earthquake self-reset according to claim 1 can assemble multi-section beam eccentrically supported steel frame; it is characterized in that: adopt prefabricated concrete-profiled steel plate combination floor; concrete slab (17) is poured in factory; profiled steel plate (16 ) as a bottom form and cast as a whole; or cast in-situ at the construction site. 5. The self-resetting post-earthquake self-assembled multi-segment beam eccentrically supported steel frame according to claim 1; it is characterized in that: the frame structure system is formed after gradual installation; the floor is made of prefabricated concrete-profiled steel composite floor.