A square steel tube buckling assembly type anti-buckling support member

Abstract

A square steel tube buckle-assembled anti-buckling support member comprises a cross-shaped core member located in the center, four constrained square steel tube assemblies respectively arranged at four right angles of the cross-shaped core member to form peripheral constraint units, the parts of each two adjacent constrained square steel tube assemblies extending out of the outer edge of the wing plate of the cross-shaped core member are fixedly connected to each other by a bolt assembly, and concrete is poured into the tube of each constrained square steel tube assembly. The present invention provides an effective connection and anchoring measure for the peripheral constraint members to meet the demand for large energy consumption under the action of a large earthquake and achieve the goal of limiting the overall lateral displacement of the structure. All steel components can be processed and manufactured in the factory, the accuracy is easy to control, and it is very convenient to replace the damaged components after an earthquake. The present invention has a greater bearing capacity and can provide support in two directions, and can be widely used in energy dissipation, shock absorption and limit control of buildings.

Description

Technical Field

[0001] The present invention relates to a support member, and in particular to a square steel tube buckling assembly type anti-buckling support member used for vibration control of structural engineering. Background Art

[0002] In building structural engineering, in order to prevent ordinary supports from buckling under compression and poor hysteresis performance, the method of adding external constraints is usually adopted, such as using steel tube concrete or reinforced concrete as an external constraint to form an anti-buckling support. Japanese scholars have improved this type of support by setting a layer of unbonded material or a very narrow air layer between the core steel plate and the mortar, in order to reduce or eliminate the axial force on the core steel plate from being transmitted to the mortar or the outer steel tube. This type of support is an axial force member that can yield without bending under tension and compression, and has more stable mechanical properties than traditional support members. It has the advantages of ordinary supports and dampers, providing lateral stiffness for the structure under small earthquakes, and dissipating seismic energy by yielding the steel core under medium and large earthquakes. As a new technology for shock absorption and earthquake resistance, anti-buckling energy dissipation supports are increasingly used in large public buildings, greatly improving the seismic performance of buildings. However, when pouring concrete with traditional steel tube concrete or reinforced concrete as an external constraint, it is difficult to control the gap accuracy between the internal support and the external constraint. To address this problem, some scholars have proposed assembled anti-buckling supports, where all steel components can be made in the factory with high processing accuracy. The distance between the core component and the peripheral constraint component is easy to control and adjust, thus realizing assembled production and construction. However, due to the small area of ​​the core component, the single force direction, and the limited yield load, it cannot meet the requirements of super-large support force in engineering. At the same time, the connection and anchoring technology of the peripheral constraint component is not perfect, and the connection of the component is prone to damage under the action of a large earthquake, which cannot meet the demand for large energy consumption. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a square steel tube buckling-resistant support member having a greater bearing capacity and capable of providing support in two directions.

[0004] The technical solution adopted by the present invention is: a square steel tube buckling assembly anti-buckling support component, including a cross-shaped core component located in the center, and four constrained square steel tube assemblies respectively arranged at four right-angled angles of the cross-shaped core component to form a peripheral constraint unit, wherein the parts of each two adjacent constrained square steel tube assemblies extending out of the outer edge side of the wing plate of the cross-shaped core component are fixedly connected to each other by a bolt assembly, and concrete is poured into the tube of each of the constrained square steel tube assemblies.

[0005] A gap of 1 mm to 2 mm is formed between the joint surfaces of the four restraining square steel tube components and the cross-shaped core component, and the gap is filled with hard rubber.

[0006] The cross-shaped core component comprises two T-shaped hot-rolled steel sections, the horizontal parts of the two T-shaped hot-rolled steel sections are butt-jointed to form the cross-shaped core component, and each T-shaped hot-rolled steel section has three integrally formed wing plates.

[0007] A hard rubber pad is sandwiched between the horizontal parts of the two oppositely connected T-section hot-rolled steel sections.

[0008] The constrained square steel tube assembly includes a first equilateral angle steel and a second equilateral angle steel, wherein the two first right-angle plates of the first equilateral angle steel are larger than the two second right-angle plates of the second equilateral angle steel, and the second equilateral angle steel is buckled in the right angle formed by the two first right-angle plates of the first equilateral angle steel, and the edges of the two second right-angle plates of the second equilateral angle steel are fixedly connected to the inner side surfaces of the two first right-angle plates of the first equilateral angle steel by welding, thereby together constituting a constrained square steel tube assembly.

[0009] The outer side surfaces of the two first right-angled side plates of the first equilateral angle steel are connected to the plate surfaces of the two wing plates forming a right angle in the T-section hot-rolled steel forming the cross-shaped core component through hard rubber, wherein the width of the two first right-angled side plates of the first equilateral angle steel is greater than the width of the wing plates forming a right angle in the T-section hot-rolled steel. When the four constrained square steel pipe assemblies are respectively arranged in the four right-angled angles of the cross-shaped core component, the edge portions of the two adjacent first right-angled side plates grow out of the clamped wing plates and are fixedly connected to each other by bolt assemblies.

[0010] The length of the cross-shaped core component is greater than the length of the constrained square steel pipe assembly, that is, both ends of the cross-shaped core component extend out of both ends of the constrained square steel pipe assembly.

[0011] The bolt assembly includes a steel pad with an axial through hole arranged between two first right-angled edge plates of two adjacent constraining square steel pipe assemblies, as well as a high-strength bolt and a lock nut. The screw end of the high-strength bolt sequentially penetrates the previous first right-angled edge plate, the steel pad and the next first right-angled edge plate and is threadedly connected to the lock nut. Rubber gaskets are arranged between the two ends of the steel pad and the corresponding first right-angled edge plates, and a metal gasket is arranged between the nut of the high-strength bolt and the adjacent first right-angled edge plate.

[0012] The lower part of the screw portion of the high-strength bolt is radially formed with a through internal screw hole, and the anti-loosening nut includes a nut cap and a nut sleeve integrally formed on the lower side of the nut cap. The nut cap and the nut sleeve are axially formed with interpenetrating internal threads for combining with the high-strength bolt, and a screw hole is formed on the nut sleeve corresponding to the internal screw hole in the lower part of the screw of the high-strength bolt. After the screw end of the high-strength bolt enters the anti-loosening nut, the internal screw hole in the lower part of the screw of the high-strength bolt is aligned with the hole center of the screw hole on the nut sleeve of the anti-loosening nut, and is positioned by a screwed-in positioning bolt.

[0013] The contact surfaces of the high-strength bolt and the metal gasket are respectively formed with radial convex patterns that can mesh with each other, and the outer side surface of the screw of the high-strength bolt is symmetrically formed with two vertical grooves along the axial direction, and the inner ring edge of the metal gasket is symmetrically formed with two inner wings protruding toward the center of the ring for embedding into the vertical grooves for positioning.

[0014] The square steel tube buckle-assembled anti-buckling support member of the present invention provides an effective connection and anchoring measure for the peripheral constraint members to meet the demand for large energy consumption under the action of a large earthquake and achieve the goal of limiting the overall lateral displacement of the structure. All steel components in the present invention can be processed and manufactured in a factory, and the precision is easy to control, and it is very convenient to replace damaged components after an earthquake. It has a certain initial stiffness to resist wind loads and small earthquakes. When the fortification intensity is exceeded, the energy-absorbing element enters a working state and dissipates seismic energy. The present invention has a greater bearing capacity and can provide support in two directions. It can be widely used in energy dissipation, shock absorption and limit control of buildings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a square steel tube buckle-assembled buckling-resistance support member of the present invention;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of a square steel tube buckling assembly type buckling-resistance support member of the present invention;

[0017] Figure 3 It is a schematic diagram of the exploded structure of a square steel tube buckling assembly type buckling-resistance support member of the present invention;

[0018] Figure 4 It is a structural schematic diagram of the high-strength bolt in the present invention;

[0019] Figure 5 It is a structural schematic diagram of the anti-loosening nut in the present invention;

[0020] Figure 6 It is a structural schematic diagram of the metal gasket in the present invention.

[0021] In the figure

[0022] 1: Cross-shaped core component 1.1: Horizontal part

[0023] 1.2: Wing plate 2: Constrained square steel tube assembly

[0024] 2.1: The first equal-leg angle steel 2.11: The first right-angle edge plate

[0025] 2.2: Second equal-leg angle steel 2.21: Second right-angle edge plate

[0026] 3: Bolt assembly 3.1: Steel backing plate

[0027] 3.2: Rubber gasket 3.3: High-strength bolts

[0028] 3.4: Locknut 3.5: Metal gasket

[0029] 3.6: Internal screw hole 3.7: Vertical groove

[0030] 3.8: Nut cap 3.9: Nut sleeve

[0031] 3.10: Screw hole 3.11: Positioning bolt

[0032] 3.12: Radial ridges 3.13: Inner wings

[0033] 4: Concrete 5: Hard rubber

[0034] 6: Hard rubber pad DETAILED DESCRIPTION

[0035] The following is a detailed description of a square steel tube buckle-assembled anti-buckling support member of the present invention in conjunction with the embodiments and drawings.

[0036] like Figure 1 , Figure 2 As shown, a square steel tube buckle assembly type buckling-resistance support member of the present invention comprises a cross-shaped core member 1 located in the center, and four constrained square steel tube assemblies 2 respectively arranged at four right angles of the cross-shaped core member 1 to form peripheral constrained units, wherein the parts of each two adjacent constrained square steel tube assemblies 2 extending out of the outer edge side of the wing plate 1.2 of the cross-shaped core member 1 are fixedly connected to each other by bolt assemblies 3, and concrete 4 is poured into the tube of each of the constrained square steel tube assemblies 2. A gap of 1mm to 2mm is formed between the joint surfaces of the four constrained square steel tube assemblies 2 and the cross-shaped core member 1, and the gap is filled with hard rubber 5.

[0037] Pouring concrete 4 into the constrained square steel tube assembly 2 can effectively prevent local buckling of the constrained square steel tube assembly 2 on the one hand, and limit the cracking of the concrete inside the constrained square steel tube assembly 2 on the other hand, which not only improves the constraint efficiency of the peripheral constraining components, but also significantly improves the ductility performance of the components, greatly enhances the energy consumption capacity, and improves the seismic performance.

[0038] like Figure 2 , Figure 3 As shown, the cross-shaped core member 1 is composed of two T-shaped hot-rolled steel sections, and the horizontal parts 1.1 of the two T-shaped hot-rolled steel sections are butted together to form the cross-shaped core member 1, and each T-shaped hot-rolled steel section has three integrally formed wing plates 1.2. A hard rubber pad 6 is sandwiched between the horizontal parts 1.1 of the two T-shaped hot-rolled steel sections that are butted together. The T-shaped hot-rolled steel section composed of two T-shaped hot-rolled steel sections, on the one hand, avoids the adverse effects of the welded section on the ductility, bearing capacity and energy dissipation capacity of the member, and on the other hand, due to the different thicknesses of the flanges of the cross-shaped core member in two directions, the role played by the cross-shaped core member in the two directions is different, and the arrangement is carried out according to the actual situation of the engineering structure.

[0039] like Figure 1 , Figure 2 , Figure 3 As shown, the constrained square steel tube assembly 2 includes a first equilateral angle steel 2.1 and a second equilateral angle steel 2.2, wherein the two first right-angle plates 2.11 of the first equilateral angle steel 2.1 are larger than the two second right-angle plates 2.21 of the second equilateral angle steel 2.2, and the second equilateral angle steel 2.2 is buckled in the right angle formed by the two first right-angle plates 2.11 of the first equilateral angle steel 2.1, and the edges of the two second right-angle plates 2.21 of the second equilateral angle steel 2.2 are fixedly connected to the inner side surfaces of the two first right-angle plates 2.11 of the first equilateral angle steel 2.1 by welding, thereby jointly constituting the constrained square steel tube assembly 2.

[0040] like Figure 2 As shown, the outer side surfaces of the two first right-angle plates 2.11 of the first equilateral angle steel 2.1 are connected to the plate surfaces of the two wing plates 1.2 forming a right angle in the T-section hot-rolled steel constituting the cross-shaped core component 1 through a hard rubber 5, wherein the width of the two first right-angle plates 2.11 of the first equilateral angle steel 2.1 is greater than the width of the wing plates 1.2 forming a right angle in the T-section hot-rolled steel, and when the four constrained square steel pipe assemblies 2 are respectively arranged in the four right-angled angles of the cross-shaped core component 1, the edge portions of the two adjacent first right-angle plates 2.11 grow out of the clamped wing plates 1.2 and are fixedly connected to each other by a bolt assembly 3.

[0041] like Figure 1As shown, the length of the cross-shaped core component 1 is greater than the length of the constrained square steel tube assembly 2 , that is, both ends of the cross-shaped core component 1 extend out of both ends of the constrained square steel tube assembly 2 .

[0042] like Figure 2 As shown, the bolt assembly 3 includes a steel pad 3.1 with an axial through hole arranged between two first right-angled edge plates 2.11 of two adjacent constraining square steel pipe assemblies 2, as well as a high-strength bolt 3.3 and a lock nut 3.4, the screw end of the high-strength bolt 3.3 sequentially penetrates the previous first right-angled edge plate 2.11, the steel pad 3.1 and the next first right-angled edge plate 2.11 and is threadedly connected with the lock nut 3.4, wherein rubber gaskets 3.2 are arranged between the two ends of the steel pad 3.1 and the corresponding first right-angled edge plates 2.11, and a metal gasket 3.5 is arranged between the nut of the high-strength bolt 3.3 and the adjacent first right-angled edge plate 2.11.

[0043] like Figure 4 , Figure 5 As shown, a through inner screw hole 3.6 is formed in the radial direction at the lower part of the screw rod portion of the high-strength bolt 3.3, and the anti-loosening nut 3.4 includes a nut cap 3.8 and a nut sleeve 3.9 integrally formed at the lower side of the nut cap 3.8. The nut cap 3.8 and the nut sleeve 3.9 are formed with intersecting inner threads for combining with the high-strength bolt 3.3 along the axial direction, and a screw hole 3.10 is formed on the nut sleeve 3.9 corresponding to the inner screw hole 3.6 at the lower part of the screw rod of the high-strength bolt 3.3. After the screw rod end of the high-strength bolt 3.3 enters the anti-loosening nut 3.4, the inner screw hole 3.6 at the lower part of the screw rod of the high-strength bolt 3.3 is aligned with the hole center of the screw hole 3.10 on the nut sleeve 3.9 of the anti-loosening nut 3.4, and is positioned by screwing in a positioning bolt 3.11. The high-strength bolt 3.3 and the anti-loosening nut 3.4 are positioned by screwing in the positioning bolt 3.11, in order to prevent the high-strength bolt 3.3 from loosening under the reciprocating action of the load. This method has the advantages of simple structure, easy processing, low cost and good anti-loosening effect.

[0044] like Figure 4 , Figure 6 As shown, the contact surfaces of the high-strength bolt 3.3 and the metal gasket 3.5 are respectively formed with radial convex patterns 3.12 that can mesh with each other, and the outer side surface of the screw of the high-strength bolt 3.3 is symmetrically formed with two vertical grooves 3.7 along the axial direction, and the inner ring edge of the metal gasket 3.5 is symmetrically formed with two inner wings 3.13 protruding toward the center of the ring for embedding into the vertical grooves 3.7 for positioning.

[0045] The working principle of the square steel tube buckling assembly type buckling-resistance support member of the present invention is:

[0046] When external load is applied to the anti-buckling support, the cross-shaped core member 1 bears all the earthquake effects first. The cross-shaped core member 1 yields and consumes energy under the action of axial force. The four constrained square steel pipe assemblies 2 of the outer square steel tube concrete structure provide bending restrictions to the cross-shaped core member 1 to prevent it from buckling under compression. When it expands under pressure, the hard rubber 5 and hard rubber pad 6 pasted on the surface can effectively reduce or cut off the force transmitted to the constrained square steel pipe assembly 2 when the cross-shaped core member 1 is subjected to axial force, so that the two have a clear division of labor in the support system and reasonable force. High-strength bolts 3.3, metal washers 3.5, anti-loosening nuts 3.4 and positioning bolts 3.11 play a binding role, ensuring that the four outer constrained square steel pipe assemblies 2 and the cross-shaped core member 1 in the center are deformed in lateral coordination, and also ensuring that longitudinal coordinated deformation occurs between the components.

Claims

1. A square steel tube buckling assembly type buckling-resistance support member, characterized in that: It comprises a cross-shaped core component (1) located in the center, and four restraining square steel pipe assemblies (2) respectively arranged at four right angles of the cross-shaped core component (1) to form peripheral restraining units, wherein the parts of each two adjacent restraining square steel pipe assemblies (2) extending out of the outer edge side of the wing plate (1.2) of the cross-shaped core component (1) are fixedly connected to each other by a bolt assembly (3), and concrete (4) is poured into the tube of each of the restraining square steel pipe assemblies (2); A gap of 1 mm to 2 mm is formed between the joint surfaces of the four restraining square steel tube components (2) and the cross-shaped core component (1), and the gap is filled with hard rubber (5); The cross-shaped core component (1) comprises two T-shaped hot-rolled steel sections, the horizontal parts (1.1) of the two T-shaped hot-rolled steel sections are butt-jointed to form the cross-shaped core component (1), and each T-shaped hot-rolled steel section has three integrally formed wing plates (1.2); a hard rubber pad (6) is sandwiched between the horizontal parts (1.1) of the two T-shaped hot-rolled steel sections that are butt-jointed; The constrained square steel tube assembly (2) comprises a first equilateral angle steel (2.1) and a second equilateral angle steel (2.2), wherein the two first right-angle plates (2.11) of the first equilateral angle steel (2.1) are larger than the two second right-angle plates (2.21) of the second equilateral angle steel (2.2), the second equilateral angle steel (2.2) is buckled in the right angle formed by the two first right-angle plates (2.11) of the first equilateral angle steel (2.1), and the edges of the two second right-angle plates (2.21) of the second equilateral angle steel (2.2) are fixedly connected to the inner side surfaces of the two first right-angle plates (2.11) of the first equilateral angle steel (2.1) by welding, thereby forming the constrained square steel tube assembly (2); The outer side surfaces of the two first right-angled side plates (2.11) of the first equilateral angle steel (2.1) are connected to the plate surfaces of the two right-angled wing plates (1.2) in the T-shaped hot-rolled steel section constituting the cross-shaped core component (1) through hard rubber (5), wherein the width of the two first right-angled side plates (2.11) of the first equilateral angle steel (2.1) is greater than the width of the right-angled wing plates (1.2) in the T-shaped hot-rolled steel section, and when the four constrained square steel tube assemblies (2) are respectively arranged in the four right-angled angles of the cross-shaped core component (1), the edge portions of the two adjacent first right-angled side plates (2.11) grow out of the clamped wing plates (1.2) and are fixedly connected to each other by bolt assemblies (3); The length of the cross-shaped core component (1) is greater than the length of the constrained square steel tube assembly (2), that is, the two ends of the cross-shaped core component (1) extend out of the two ends of the constrained square steel tube assembly (2); The bolt assembly (3) comprises a steel backing plate (3.1) having an axial through hole arranged between two first right-angled edge plates (2.11) of two adjacent constrained square steel tube assemblies (2), a high-strength bolt (3.3) and a locking nut (3.4), wherein the end of the screw of the high-strength bolt (3.3) sequentially penetrates the first first right-angled edge plate (2.11), the steel backing plate (3.1) and the second first right-angled edge plate (2.11) and is then threadedly connected to the locking nut (3.4), wherein rubber gaskets (3.2) are arranged between the two ends of the steel backing plate (3.1) and the corresponding first right-angled edge plates (2.11), and a metal gasket (3.5) is arranged between the nut of the high-strength bolt (3.3) and the adjacent first right-angled edge plates (2.11); The lower part of the screw rod of the high-strength bolt (3.3) is radially formed with a through internal screw hole (3.6); the anti-loosening nut (3.4) comprises a nut cap (3.8) and a nut sleeve (3.9) integrally formed at the lower side of the nut cap (3.8); the nut cap (3.8) and the nut sleeve (3.9) are axially formed with interpenetrating internal threads for combining with the high-strength bolt (3.3); a screw hole (3.10) is formed on the nut sleeve (3.9) corresponding to the internal screw hole (3.6) at the lower part of the screw rod of the high-strength bolt (3.3); after the end of the screw rod of the high-strength bolt (3.3) enters the anti-loosening nut (3.4), the internal screw hole (3.6) at the lower part of the screw rod of the high-strength bolt (3.3) is aligned with the hole center of the screw hole (3.10) on the nut sleeve (3.9) of the anti-loosening nut (3.4), and is positioned by screwing in a positioning bolt (3.11); The contact surfaces of the high-strength bolt (3.3) and the metal gasket (3.5) are respectively formed with radial convex patterns (3.12) that can mesh with each other, the outer side surface of the screw of the high-strength bolt (3.3) is symmetrically formed with two vertical grooves (3.7) along the axial direction, and the inner ring edge of the metal gasket (3.5) is symmetrically formed with two inner wings (3.13) protruding toward the center of the ring and used to be embedded in the vertical grooves (3.7) for positioning.

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