Fabricated steel pipe type composite buckling-restrained brace

Abstract

The utility model discloses an assembled steel pipe type composite buckling-restrained brace which comprises a viscous damper, an inner constraint steel pipe, a core steel pipe and an outer constraint steel pipe. The inner constraint steel pipe comprises an inner constraint pipe body and a pair of first connecting discs, the core steel pipe comprises a core pipe body and a pair of second connecting discs, a plurality of positioning hole points are formed in the surface of the core pipe body, and the outer constraint steel pipe comprises an outer constraint pipe body and a pair of third connecting discs; through holes are formed in the surfaces of the second connecting disc and the third connecting disc, the inner diameter of the outer restraining pipe body is larger than the outer diameter of the core pipe body, the inner restraining pipe body is arranged in the through holes of the core pipe body and the second connecting disc in a penetrating mode, and the core pipe body is arranged in the through holes of the outer restraining pipe body and the third connecting disc in a penetrating mode. And the viscous damper is fixed with the first connecting disc, the second connecting disc and the third connecting disc. The assembled steel pipe type composite buckling-restrained brace has the advantages that the assembled steel pipe type composite buckling-restrained brace is diversified in damping and energy dissipation form, and the interior is not prone to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of building shock absorption, in particular to an assembled steel pipe type composite anti-buckling support. Background Art

[0002] Buckling-resistance bracing is a new type of support. It is usually composed of three parts: an inner steel core, an outer restraining sleeve, and a non-bonded isolation material between the two. Its function is to dissipate energy by buckling the core unit, thus protecting the main structure under earthquakes. Ordinary buckling-resistance braces are mostly restrained by concrete, which is heavy. They only provide rigidity to the structure under small earthquakes, and act as shock absorbers under medium and large earthquakes. They dissipate the energy input to the structure through deformation and destruction of the support members. The energy dissipation form is single and the energy dissipation mechanism is unique. In addition, the connection section is mostly connected to the node plate by welding or bolts. When subjected to eccentric loads, the connection section is very easy to be damaged, which needs to be improved. Utility Model Content

[0003] The utility model aims to provide an assembled steel pipe type composite buckling-resisting support which has various shock-absorbing and energy-dissipating forms and is not prone to damage.

[0004] The utility model proposes an assembled steel pipe composite buckling-resisting support, comprising a viscous damper, an inner constraint steel pipe, a core steel pipe and an outer constraint steel pipe; the inner constraint steel pipe comprises an inner constraint pipe body and a pair of first connecting plates, the two first connecting plates are detachably mounted at the two ends of the inner constraint pipe body, the core steel pipe comprises a core pipe body and a pair of second connecting plates, a plurality of positioning holes are formed on the surface of the core pipe body, the two second connecting plates are detachably mounted at the two ends of the core pipe body, the outer constraint steel pipe comprises an outer constraint pipe body and a pair of third connecting plates, the two third connecting plates are detachably mounted at the two ends of the outer constraint pipe body; through holes are formed on the surfaces of the second connecting plates and the third connecting plates, the inner diameter of the outer constraint pipe body is larger than the outer diameter of the core pipe body, the inner diameter of the core pipe body is larger than the outer diameter of the inner constraint pipe body, the inner constraint pipe body is penetrated in the through holes of the core pipe body and the second connecting plate, the core pipe body is penetrated in the through holes of the outer constraint pipe body and the third connecting plate, and the viscous damper is fixed to the first connecting plate, the second connecting plate and the third connecting plate.

[0005] Preferably, the surfaces of the first connecting plate, the second connecting plate and the third connecting plate are all provided with threaded tubes, and the outer surfaces of the inner constraint tube body, the core tube body and the outer constraint tube body are provided with threaded sections at both ends, and the threaded tubes are threadedly connected with the threaded sections.

[0006] Preferably, bolt holes are formed on the surfaces of the first connection plate, the second connection plate and the third connection plate, and the first connection plate, the second connection plate and the third connection plate are fixed to the viscous damper by SMA bolts.

[0007] Preferably, the plurality of positioning holes are evenly distributed along the length direction of the core tube body.

[0008] Preferably, a plurality of waist-shaped holes are formed on the surface of the core tube body, and the plurality of waist-shaped holes are arranged at intervals from the positioning holes.

[0009] Preferably, the diameter size of the through hole of the second connecting disk is set to "L", the inner diameter size of the core tube body is set to "D", and L=D is satisfied; the diameter size of the through hole of the third connecting disk is set to "H", the inner diameter size of the outer constraint tube body is set to "S", and H=S is satisfied.

[0010] From the above description of the utility model, it can be seen that the utility model has the following beneficial effects:

[0011] 1. During small earthquakes, the piston rod of the viscous damper squeezes the oil in the cylinder to dissipate energy. During medium or large earthquakes, the core tube body bends to dissipate energy. After the earthquake, the SMA bolts can help the core tube body to achieve a self-reset effect. The assembled steel pipe composite buckling-resistance support has various forms of shock absorption and energy dissipation, and the internal part is not easily damaged.

[0012] 2. Threaded connections are used between the inner constraint tube body and the first connection plate, between the core tube body and the second connection plate, and between the outer constraint tube body and the third connection plate. The structure is simple and easy to promote. At the same time, it is easy to disassemble and replace the core unit and observe the situation after the earthquake.

[0013] 3. The first connection plate, the second connection plate and the third connection plate are fixed with SMA bolts, which have a recoverable effect after an earthquake; while avoiding welding at the connection, it ensures that the factory can directly manufacture components without additional welding, reducing the impact of initial defects on the mechanical properties of BRB. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of an assembled steel tube composite buckling-restrained brace according to an embodiment;

[0015] Figure 2 is a schematic structural diagram of a viscous damper according to an embodiment;

[0016] Figure 3 is a schematic diagram of the structure of the restrained steel pipe in the embodiment;

[0017] Figure 4 It is a structural schematic diagram of the core steel pipe of the embodiment;

[0018] Figure 5 2 is a schematic diagram of the structure of a restrained steel pipe according to an embodiment of the present invention;

[0019] Figure 6 is a side view of a restrained steel pipe in an embodiment;

[0020] Figure 7 is a side view of a core steel pipe of an embodiment;

[0021] Figure 8 is a side view of a restrained steel pipe according to an embodiment;

[0022] Fig. 9 is a front view of the third connection disk of the embodiment;

[0023] Fig.10 is a front view of the second connection disk of the embodiment;

[0024] Fig.11 It is a front view of the first connecting disk of the embodiment.

[0025] Figure numerals: 1. Viscous damper; 2. Inner constraint steel tube; 21. Inner constraint tube body; 211. Threaded section; 22. First connecting plate; 221. Threaded tube; 222. Bolt hole; 3. Core steel tube; 31. Core tube body; 311. Waist-shaped hole; 312. Positioning hole point; 32. Second connecting plate; 321. Through hole; 4. External constraint steel tube; 41. External constraint tube body; 42. Third connecting plate; 5. SMA bolt. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the following is a summary of the technical problems, technical solutions and beneficial effects to be solved by the present invention. Figure 1-11 It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Reference Figure 1-Figure 8 A composite anti-buckling support with an assembled steel tube includes a viscous damper 1, an inner constraint steel tube 2, a core steel tube 3 and an outer constraint steel tube 4. The inner constraint steel tube 2 includes an inner constraint tube body 21 and a pair of first connecting plates 22, and the two first connecting plates 22 are detachably installed at the two ends of the inner constraint tube body 21; the core steel tube 3 includes a core tube body 31 and a pair of second connecting plates 32, and the two second connecting plates 32 are detachably installed at the two ends of the core tube body 31; the outer constraint steel tube 4 includes an outer constraint tube body 41 and a pair of third connecting plates 42, and the two third connecting plates 42 are detachably installed at the two ends of the outer constraint tube body 41.

[0028] The inner diameter of the outer constraint tube body 41 is larger than the outer diameter of the core tube body 31, and the inner diameter of the core tube body 31 is larger than the outer diameter of the inner constraint tube body 21. In order to meet the detachable installation between the inner constraint tube body 21 and the first connection plate 22, a threaded tube 221 is formed at the center of the surface of the two first connection plates 22, and correspondingly, threaded sections 211 are formed at both ends of the surface of the inner constraint tube body 21, so that the threaded tubes 221 on the two first connection plates 22 are threadedly connected with the threaded sections 211 at both ends of the surface of the inner constraint tube body 21. In order to meet the detachable installation between the core tube body 31 and the second connection plate 32, a threaded tube 221 is also formed at the center of the surface of the two second connection plates 32, and correspondingly, threaded sections 211 are also formed at both ends of the surface of the core tube body 31, so that the threaded tubes 221 on the two second connection plates 32 are threadedly connected with the threaded sections 211 at both ends of the surface of the core tube body 31. In order to meet the requirements of detachable installation between the outer constraint tube body 41 and the third connecting plate 42, a threaded tube 221 is also provided at the center of the surface of the two third connecting plates 42, and correspondingly, a threaded section 211 is also formed at both ends of the surface of the outer constraint tube body 41, so that the threaded tube 221 on the two third connecting plates 42 is threadedly connected to the threaded sections 211 at both ends of the surface of the outer constraint tube body 41.

[0029] Reference Figure 6-Figure 11 , the two third connection plates 42 are threadedly connected and fixed to the two ends of the outer constraint tube body 41, a through hole 321 is formed on the surface of the third connection plate 42, the diameter size of the through hole 321 on the surface of the third connection plate 42 is set to "H", the inner diameter size of the outer constraint tube body 41 is set to "S", and H=S is satisfied. The core tube body 31 is inserted into the outer constraint tube body 41, and the two ends of the core tube body 31 located in the outer constraint tube body 41 are inserted through the through hole 321 of the third connection plate 42, and the two second connection plates 32 are threadedly connected to the threaded sections 211 at the two ends of the surface of the core tube body 31, so that the surface of the second connection plate 32 abuts against the third connection plate 42.

[0030] The diameter of the through hole 321 of the second connection plate 32 is set to "L", and the inner diameter of the core tube body 31 is set to "D", and the relationship between the diameter of the through hole 321 of the second connection plate 32 and the inner diameter of the core tube body 31 satisfies L=D. The inner constraint tube body 21 is inserted into the core tube body 31, and the two ends of the inner constraint tube body 21 located in the core tube body 31 are inserted through the through hole 321 of the second connection plate 32, and the threaded tubes 221 of the two first connection plates 22 are respectively threadedly connected with the threaded sections 211 at the two ends of the surface of the inner constraint tube body 21, so that the surface of the first connection plate 22 is abutted against the surface of the second connection plate 32, and the bolt holes 222 on the surfaces of the first connection plate 22, the second connection plate 32 and the third connection plate 42 correspond to each other. One end of the viscous damper 1 is brought into contact with the surface of one of the first connecting plates 22 , and finally the viscous damper 1 , the first connecting plate 22 , the second connecting plate 32 and the third connecting plate 42 are locked and fixed by using SMA bolts 5 .

[0031] The first connection plate 22, the second connection plate 32 and the third connection plate 42 are connected by SMA threads, which has the advantages of convenient fixing, can speed up the construction speed and reduce the construction difficulty. The fully assembled type is easy to replace at any time after damage. No concrete pouring is required to reduce the dead weight and construction difficulty. It can also ensure that the entire length of the inner constraint tube body 21 and the core tube body 31 are constrained to prevent damage to the end connection part. The outer constraint tube and the end plate, the inner constraint tube and the end plate and the core unit are connected by threaded connection ends, avoiding welding at the connection while ensuring that the factory can directly manufacture the components without additional welding, reducing the impact of initial defects on the mechanical properties of BRB.

[0032] A plurality of waist-shaped holes 311 and a plurality of positioning holes 312 are formed on the surface of the core tube body 31. The plurality of positioning holes 312 are evenly distributed along the length direction of the surface of the core tube body 31, and the plurality of positioning holes and the plurality of waist-shaped holes 311 are arranged at intervals. The plurality of positioning holes 312 and the plurality of waist-shaped holes 311 formed on the surface of the core tube body 31 enable the core tube body 31 to achieve a fixed-point yield effect. The viscous damper 1 is selected as an ordinary liquid viscous damper 1, and energy is consumed by squeezing the oil in the cylinder by the piston during a small earthquake.

[0033] The specific implementation principle of the embodiment of the present application is: when a small earthquake occurs, the vibration causes the piston rod of the viscous damper 1 to squeeze the oil in the cylinder to consume energy. When a medium or large earthquake occurs, the core tube body 31 bends to consume energy. A waist-shaped hole 311 and a positioning hole point 312 are provided on the surface of the core tube body 31 to meet the fixed-point yield of the core tube body 31. After the earthquake, the SMA bolt 5 can help the core tube body 31 to achieve a self-reset effect. By providing waist-shaped holes 311 and positioning holes 312 on the surface of the viscous damper 1 and the core tube body 31 to meet the fixed-point yield of the core tube body 31, the energy consumption forms are diverse, and the tensile strength is improved by realizing multi-mechanism energy consumption, and it is not easy to be damaged.

[0034] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all protected by the utility model.

Claims

1. An assembled steel tube composite buckling-restrained brace, characterized in that: It includes a viscous damper, an inner restraining steel pipe, a core steel pipe and an outer restraining steel pipe; The inner constraint steel pipe comprises an inner constraint tube body and a pair of first connection plates, the two first connection plates are detachably mounted at both ends of the inner constraint tube body, the core steel pipe comprises a core tube body and a pair of second connection plates, a plurality of positioning holes are formed on the surface of the core tube body, the two second connection plates are detachably mounted at both ends of the core tube body, the outer constraint steel pipe comprises an outer constraint tube body and a pair of third connection plates, the two third connection plates are detachably mounted at both ends of the outer constraint tube body; Through holes are formed on the surfaces of the second connecting plate and the third connecting plate, the inner diameter of the outer constraint tube body is larger than the outer diameter of the core tube body, the inner diameter of the core tube body is larger than the outer diameter of the inner constraint tube body, the inner constraint tube body is inserted into the through holes of the core tube body and the second connecting plate, the core tube body is inserted into the through holes of the outer constraint tube body and the third connecting plate, and the viscous damper is fixed to the first connecting plate, the second connecting plate and the third connecting plate.

2. The assembled steel tube composite buckling-restrained brace according to claim 1, characterized in that: The surfaces of the first connection plate, the second connection plate and the third connection plate are all provided with threaded tubes, and the outer surfaces of the inner constraint tube body, the core tube body and the outer constraint tube body are both provided with threaded sections at both ends, and the threaded tubes are threadedly connected with the threaded sections.

3. The assembled steel tube composite buckling-restrained brace according to claim 1, characterized in that: Bolt holes are formed on the surfaces of the first connection plate, the second connection plate and the third connection plate, and the first connection plate, the second connection plate and the third connection plate are fixed to the viscous damper by SMA bolts.

4. The assembled steel tube composite buckling-restrained brace according to claim 1, characterized in that: The plurality of positioning holes are evenly distributed along the length direction of the core tube body.

5. The assembled steel tube composite buckling-restrained brace according to claim 1, characterized in that: A plurality of waist-shaped holes are formed on the surface of the core tube body, and the plurality of waist-shaped holes are arranged at intervals from the positioning holes.

6. The assembled steel tube composite buckling-restrained brace according to claim 1, characterized in that: The through hole diameter size of the second connecting disk is set to "L", the inner diameter size of the core tube body is set to "D", and L=D is satisfied; the through hole diameter size of the third connecting disk is set to "H", the inner diameter size of the outer constraint tube body is set to "S", and H=S is satisfied.

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