A cross-bracing structure with a central energy-absorbing plate

Abstract

The present invention provides a cross-support structure with a central energy-absorbing plate, comprising: a gate-shaped steel frame; an energy-absorbing plate, located in the gate-shaped steel frame; four support segments forming an X shape, one end of each support segment being connected to the energy-absorbing plate, and the other end being connected to the gate-shaped steel frame. The plastic deformation of the energy-absorbing plate is utilized to concentrate the consumption of earthquake energy, so that the plastic deformation of the gate-shaped steel frame is smaller, thereby improving the seismic performance of the gate-shaped steel frame. At the same time, by adding an energy-absorbing plate on the basis of the existing central support structure, the cross-support structure has the advantages of high strength and high rigidity of the central support structure and good ductility and strong energy-absorbing capacity of the eccentric support structure, which is of great significance for promoting the use of steel frame support structures in high-intensity fortification areas.

Description

Technical Field

[0001] The invention relates to the technical field of building structures, in particular to a cross-bracing structure with a central energy-absorbing plate. Background Art

[0002] The steel frame structure system refers to a frame structure composed of steel beams and steel columns along the longitudinal and transverse directions of the house, which is used to bear weight and resist lateral forces. It has the characteristics of flexible space division, light weight, material saving and flexible building plan layout, so it is widely used in the construction field. However, the existing steel frame structure system has a small ability to resist lateral forces and low bearing capacity, making it difficult to be used alone in high-rise buildings. One of the solutions currently adopted is to set up a support structure in the steel frame structure system. Commonly used support structures include central support and eccentric support.

[0003] The center support refers to the support structure whose support axis intersects with the intersection of the beam-column axis. The center support has a large axial stiffness and a relatively simple structure. It can improve the internal force distribution of the structure within a certain range. The center support is divided into various support forms according to the layout of the structure: X-shaped cross support, single diagonal rod support, herringbone support, K-shaped support, V-shaped support and other support forms. It is a commonly used lateral force resisting member in high-rise building structures. However, under the action of earthquakes, the support members of the center support steel frame structure are prone to lateral buckling, which causes the bearing capacity and stiffness of the structure to drop rapidly, and the lateral displacement between the structures increases significantly, affecting the safety of the overall structure.

[0004] Eccentric support means that the intersection of the support axis with the steel beam and the intersection of the beam-column axis is at a certain distance. An energy-absorbing beam section is formed between the two intersections of the support axis and the steel beam. The energy of the energy-absorbing beam section is consumed through the plastic deformation of the energy-absorbing beam section, so it has greater ductility. However, under the action of an earthquake, the large plastic deformation of the energy-absorbing beam section often affects the use of the steel beam and the floor slab, and it is difficult to repair. Summary of the invention

[0005] The purpose of the present invention is to provide a cross-bracing structure with a central energy-absorbing plate, which can concentrate the consumption of earthquake energy through the plastic deformation of the energy-absorbing plate, so that it has the advantages of high strength and high stiffness of the central support structure and good ductility and strong energy-absorbing capacity of the eccentric support.

[0006] In order to achieve the above object, the present invention provides a cross-bracing structure with a central energy dissipation plate, comprising:

[0007] Portal steel frame;

[0008] An energy dissipation panel is located in the gate-shaped steel frame;

[0009] Four X-shaped support segments are formed, one end of each support segment is connected to the energy dissipation plate, and the other end is connected to the gate-shaped steel frame.

[0010] Optionally, the energy dissipation plate has two opposite surfaces, and a plurality of tie bars are arranged on the surfaces, and the tie bars are connected end to end to enclose a closed figure.

[0011] Optionally, the end of the pull rod is provided with a chamfer.

[0012] Optionally, a plurality of stiffening ribs are provided on the surface.

[0013] Optionally, the stiffening ribs are evenly distributed on the surface.

[0014] Optionally, the support section is detachably connected to the gate-shaped steel frame and the energy-absorbing plate by bolts.

[0015] Optionally, the support section includes two interconnected channel steels, the channel steels include a bottom plate and two oppositely arranged side plates, the two side plates are connected to opposite sides of the bottom plate, the bottom plates of the two channel steels are oppositely arranged, and the two side plates located on the same side of the two channel steels are connected by a connecting plate; there is a gap between the bottom plates of the two channel steels, the energy absorption plate at least partially extends into the gap, and the bolts penetrate the bottom plates of the two channel steels and the energy absorption plate.

[0016] Optionally, four end plates are welded on the gate-shaped steel frame, the four end plates are respectively connected to the four support sections, the end plates at least partially extend into the gap, and the bolts penetrate the bottom plates of the two channel steels and the end plates.

[0017] Optionally, the energy dissipation plate is rectangular, and one end of each of the support segments is connected to a vertex of the energy dissipation plate.

[0018] Optionally, the center of the energy dissipation plate coincides with the center of the gate-shaped steel frame.

[0019] The present invention provides a cross-support structure with a central energy-absorbing plate, which includes: a gate-shaped steel frame; an energy-absorbing plate located inside the gate-shaped steel frame; and four X-shaped support segments, one end of each support segment being connected to the energy-absorbing plate and the other end being connected to the gate-shaped steel frame. The plastic deformation of the energy-absorbing plate is utilized to concentrate the consumption of earthquake energy, so that the plastic deformation of the gate-shaped steel frame is smaller, thereby improving the seismic performance of the gate-shaped steel frame. At the same time, by adding an energy-absorbing plate on the basis of the existing central support structure, the structure has the advantages of high strength and high rigidity of the central support structure and good ductility and strong energy-absorbing capacity of the eccentric support structure, which is of great significance for promoting the use of steel frame support structures in high-intensity defense areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A front view of a cross-support structure with a central energy-absorbing plate provided in an embodiment of the present invention;

[0021] Figure 2 A three-dimensional diagram of a cross-support structure with a central energy-absorbing plate provided in an embodiment of the present invention;

[0022] Figure 3 A cross-sectional view of a support segment along the AA direction provided by an embodiment of the present invention;

[0023] Wherein, the accompanying drawings are marked as follows:

[0024] 10-gate steel frame; 20-energy dissipation plate; 30-support section; 40-bracing rod; 50-end plate;

[0025] 110-steel beam; 120-steel column; 200-stiffening rib; 300-channel steel; 310-connecting plate. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer based on the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0027] like Figure 1 and Figure 2 As shown, this embodiment provides a cross-support structure with a central energy dissipation plate, including:

[0028] Portal steel frame 10;

[0029] The energy dissipation panel 20 is located in the gate-shaped steel frame 10;

[0030] Four X-shaped support segments 30 are formed, and one end of each support segment 30 is connected to the energy dissipation plate 20 , and the other end is connected to the gate-shaped steel frame 10 .

[0031] Specifically, the gate-shaped steel frame 10 includes at least one steel beam 110 and two vertically arranged steel columns 120, the steel beam 110 and the steel columns 120 are perpendicular to each other, and the two ends of the steel beam 110 are respectively connected to the side walls of the two steel columns 120. In this embodiment, the gate-shaped steel frame 10 includes one steel beam 110 and two vertically arranged steel columns 120, and the steel beam 110 and the steel columns 120 are both made of profiled steel, and the profiled steel includes but is not limited to H-shaped steel, I-shaped steel and angle steel, etc., and can also be other special-shaped steel. In this embodiment, the steel beam 110 and the steel column 120 are both made of H-shaped steel, and the end of the steel beam 110 is welded to the flange plate of the steel column 120.

[0032] The center of the energy-absorbing plate 20 coincides with the center of the gate-shaped steel frame 10, and as an energy-absorbing element of the cross-support structure, it consumes earthquake energy through shear deformation. By adding the energy-absorbing plate 20 as an energy-absorbing element on the basis of the central support structure, the cross-support structure has the advantages of good ductility and strong energy-absorbing capacity of the eccentric support, and improves the force mechanism of the traditional central support structure. In this embodiment, the yield strength of the energy-absorbing plate 20 is less than the yield strength of the steel beam 110 and the steel column 120 so as to concentrate the energy of the earthquake, reduce the deformation of the gate-shaped steel frame 10, and improve the service life of the gate-shaped steel frame 10.

[0033] The energy dissipation plate 20 can be made of a buckling-resistant steel plate, and the shape of the steel plate is square. Of course, it can also be other structures, such as steel sections, and the present application does not impose any restrictions on this. In this embodiment, the energy dissipation plate 20 is rectangular, and one end of each of the support segments 30 is connected to a vertex of the energy dissipation plate 20.

[0034] Please continue to refer to Figure 1 The energy dissipation plate 20 has two opposite surfaces, on which a plurality of tie bars 40 are arranged, and the tie bars 40 are connected end to end to enclose a closed figure. The tie bars 40 are used to increase the stability of the energy dissipation plate 20, improve the post-buckling strength of the energy dissipation plate 20, and prevent the cracks on the energy dissipation plate 20 from expanding outward. In this embodiment, the tie bars 40 are in the shape of square bars, and there are four tie bars 40 on each surface of the energy dissipation plate 20, and the four tie bars 40 are connected end to end to enclose a rectangle. The tie bars 40 are connected to the energy dissipation plate 20 by bolts. Optionally, the ends of the tie bars 40 are provided with chamfers to prevent stress concentration.

[0035] Please continue to refer to Figure 1 , a number of stiffening ribs 200 are also arranged on the surface of the energy absorbing plate 20. The stiffening ribs 200 can effectively strengthen the rigidity of the energy absorbing plate 20 and ensure the stability of the structure, improve the energy absorbing capacity of the energy absorbing plate 20, and avoid the problem of affecting the normal use of the steel beam 110 or the floor slab due to excessive deformation of the energy absorbing plate 20. Optionally, the stiffening ribs 200 are evenly distributed on the surface of the energy absorbing plate 20. In this embodiment, there are four stiffening ribs 200 on each surface of the energy absorbing plate 20, and the four stiffening ribs 200 are arranged on the surface of the energy absorbing plate 20 in a cross-shaped form, and the distance from the stiffening rib 200 to the edge of the energy absorbing plate 20 is greater than the distance from the brace 40 to the edge of the energy absorbing plate 20. Of course, the present application does not impose any restrictions on the number and distribution of the stiffening ribs 200.

[0036] The support section 30 is detachably connected to the door-shaped steel frame 10 and the energy-absorbing plate 20 by bolts. The bolt connection can effectively increase the rotation capacity of the energy-absorbing plate 20, and realize the assembly installation of the cross-support structure. In addition, since the plastic deformation of the energy-absorbing plate 20 under the action of the earthquake concentrates the energy of the earthquake, the earthquake energy has little effect on the deformation of the steel beam 110, the steel column 120 and the support section 30. The energy-absorbing plate 20 can be easily replaced by a detachable connection, which solves the problem that the energy-absorbing plate 20 cannot be used due to excessive residual deformation after the earthquake, and greatly simplifies the repair work of the cross-support structure after the earthquake. In this embodiment, all parts of the cross-support structure can be prefabricated in the factory, and then transported to the construction site, and can be directly installed by bolts, which solves the problems of difficult to ensure the quality of welds and cumbersome installation process in the prior art, and greatly improves the construction efficiency.

[0037] Please refer to Figure 2 and Figure 3 The support section 30 includes two mutually connected channel steels 300, the channel steel 300 includes a bottom plate and two oppositely arranged side plates, the two side plates connect the opposite sides of the bottom plate, the bottom plates of the two channel steels 300 are oppositely arranged, and the two side plates located on the same side of the two channel steels 300 are connected by a connecting plate 310; there is a gap between the bottom plates of the two channel steels 300, the energy consumption plate 20 is at least partially located in the gap, and the bolts penetrate the bottom plates of the two channel steels 300 and the energy consumption plate 20. At least part of the energy consumption plate 20 referred to here can be understood as the part where the energy consumption plate 20 is connected to the channel steel 300. The stability of the support section 30 can be effectively improved by the two channel steels 300 arranged in opposite directions, and the strength, rigidity and stability requirements of the connection between the support section 30 and the energy consumption plate 20 can be met by using the bottom plates of the two channel steels 300 arranged on the opposite sides of the energy consumption plate 20. In this embodiment, one of the support sections 30 is connected to the energy dissipation plate 20 by two high-strength bolts, and at the same time, one of the support sections 30 is also connected to the energy dissipation plate 20 and the tie rod 40 by two high-strength bolts. In this embodiment, the side plates on the same side of the two channel steels 300 are at least partially welded by a steel plate.

[0038] Please continue to refer to Figure 1, four end plates 50 are welded to the gate-shaped steel frame 10, and the four end plates 50 are respectively connected to the four support segments 30, and the end plates 50 are at least partially located in the gap, and the bolts penetrate the bottom plates of the two channel steels 300 and the end plates 50. At least part of the end plates 50 referred to here can be understood as the part where the end plates 50 are joined to the channel steels 300. In this embodiment, the end plates 50 are used to connect the gate-shaped steel frame 10 and the support segments 30, and one end of the end plates 50 is welded to the gate-shaped steel frame 10, and the other end is connected to the support segments 30 by high-strength bolts. In this embodiment, the shapes and sizes of the end plates 50 are the same.

[0039] In summary, an embodiment of the present invention provides a cross-support structure with a central energy-absorbing plate, comprising: a gate-shaped steel frame; an energy-absorbing plate, located inside the gate-shaped steel frame; four support segments forming an X shape, one end of each support segment being connected to the energy-absorbing plate, and the other end being connected to the gate-shaped steel frame. The plastic deformation of the energy-absorbing plate is utilized to concentrate the consumption of earthquake energy, so that the plastic deformation of the gate-shaped steel frame is smaller, thereby improving the seismic performance of the gate-shaped steel frame. At the same time, by adding an energy-absorbing plate on the basis of the existing central support structure, the cross-support structure has the advantages of high strength and high rigidity of the central support structure and good ductility and strong energy-absorbing capacity of the eccentric support structure, which is of great significance for promoting the use of steel frame support structures in high-intensity defense areas.

[0040] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A cross-bracing structure with a central energy-absorbing plate, characterized in that: include: Portal steel frame; An energy dissipation panel is located in the gate-shaped steel frame; Four X-shaped support segments, one end of each support segment is connected to the energy dissipation plate, and the other end is connected to the gate-shaped steel frame; The energy dissipation plate has two opposite surfaces, on which a plurality of tie bars are arranged, and the tie bars are connected end to end to enclose a closed figure, and the tie bars are used to increase the stability of the energy dissipation plate, improve the post-buckling strength of the energy dissipation plate, and prevent cracks on the energy dissipation plate from expanding outwards; The end of the tie rod is provided with a chamfer, and a plurality of stiffening ribs are also provided on the surface, and the minimum distance from the stiffening rib to the edge of the energy consuming plate is smaller than the minimum distance from the tie rod to the edge of the energy consuming plate.

2. A cross-bracing structure with a central energy-absorbing plate as claimed in claim 1, characterized in that: The stiffening ribs are evenly distributed over the surface.

3. A cross-bracing structure with a central energy-absorbing plate as claimed in claim 1, characterized in that: The support section is detachably connected to the gate-shaped steel frame and the energy-absorbing plate via bolts.

4. A cross-bracing structure with a central energy-absorbing plate as claimed in claim 3, characterized in that: The support section includes two interconnected channel steels, the channel steels include a bottom plate and two oppositely arranged side plates, the two side plates are connected to the opposite sides of the bottom plate, the bottom plates of the two channel steels are oppositely arranged, and the two side plates located on the same side of the two channel steels are connected by a connecting plate; there is a gap between the bottom plates of the two channel steels, the energy absorbing plate at least partially extends into the gap, and the bolts penetrate the bottom plates of the two channel steels and the energy absorbing plate.

5. A cross-bracing structure with a central energy-absorbing plate as claimed in claim 4, characterized in that: Four end plates are welded on the gate-shaped steel frame, and the four end plates are respectively connected to the four support sections. The end plates at least partially extend into the gap, and the bolts penetrate the bottom plates of the two channel steels and the end plates.

6. A cross-bracing structure with a central energy dissipation plate as claimed in claim 1, characterized in that: The energy dissipation plate is rectangular, and one end of each of the support segments is connected to a vertex of the energy dissipation plate.

7. A cross-bracing structure with a central energy-absorbing plate as claimed in claim 1, characterized in that: The center of the energy dissipation plate coincides with the center of the gate-shaped steel frame.

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