A shear yielding buckling restrained brace

Abstract

The present invention belongs to the technical field of earthquake resistance and shock absorption in civil engineering, and specifically relates to a shear-yield buckling restrained brace; it includes a restrained energy-absorbing support portion, a shear-yield damper portion, a limiting device, and a connecting portion, the buckling restrained support portion and the shear-yield damper portion are arranged in series through the connecting portion, and the limiting device is arranged between the shear-yield damper portion and the connecting portion; by combining the shear-type metal damper and the buckling restrained brace, the defects of the conventional buckling restrained brace in small earthquake elasticity are solved. At the same time, the buckling restrained brace used in the present invention is improved over the conventional buckling restrained brace structure, and the energy dissipation effect of the buckling restrained brace is improved. Therefore, the combined shear-yield buckling restrained brace of the present invention has the mechanical characteristics of small yield displacement and high ductility ratio, which can achieve the design goal of energy dissipation in small earthquakes, medium earthquakes, and large earthquakes.

Description

Technical Field

[0001] The invention belongs to the technical field of earthquake resistance and vibration reduction in civil engineering, and in particular relates to a shear yield type buckling restrained brace. Background Art

[0002] Traditional structural design often adopts a "hard-hitting" approach, advocating for relying on the building's inherent structural rigidity to resist earthquakes. This means increasing the cross-section of structural components and the amount of material used. This not only results in a waste of cost, but also fails to achieve positive vibration control effects and makes it difficult to guarantee the safety of the building structure. Building structure energy dissipation and shock absorption technology involves installing energy dissipation devices within the structure to provide additional rigidity and damping. When an earthquake occurs, the energy dissipation devices plastically deform to dissipate the seismic energy, preventing damage or collapse of the building structure and achieving the desired shock absorption effect.

[0003] Buckling restrained energy-absorbing braces (BRBs) have been widely used as a component for energy dissipation and shock absorption in buildings. They have strong energy dissipation capacity and a full hysteresis curve. They can not only be used as structural components, but also as high-performance dampers after yielding. However, conventional buckling restrained energy-absorbing braces are simple in structure, single in function, and have a large initial elastic stiffness. They cannot play an energy-absorbing role when the structural displacement is small, resulting in the building structure being unable to meet the required inter-story displacement angle requirements under small earthquakes. The present invention improves the structure on the basis of conventional buckling restrained energy-absorbing braces, and at the same time combines the shear yield type damper part to achieve the performance requirements of small yield displacement and large ductility ratio, thereby improving the energy dissipation capacity and energy dissipation efficiency of the buckling brace. The mechanism is as follows: when a small earthquake occurs, the shear yield type damper part plays a role, relying on the plastic deformation of the shear energy-absorbing plate to dissipate the seismic energy; during moderate and large earthquakes, the shear yield type damper part and the restrained energy-absorbing brace part act simultaneously to consume seismic energy. After the structural deformation, the self-seismic period is lengthened, reducing the seismic input, thereby achieving the purpose of the structural seismic response. Summary of the Invention

[0004] The present invention aims to propose a shear-yield buckling-restrained brace. By combining a shear-type metal damper with a buckling-restrained brace, this design overcomes the shortcomings of conventional buckling-restrained braces in terms of elasticity during small earthquakes. Furthermore, the buckling-restrained brace employed in this invention offers improvements over conventional buckling-restrained brace structures, enhancing its energy dissipation efficiency. Consequently, the combined shear-yield buckling-restrained brace of this invention exhibits the mechanical properties of low yield displacement and high ductility, achieving the design goal of energy dissipation in small, moderate, and large earthquakes.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A shear yield type buckling restraint support comprises an energy-dissipating restraint support portion, a shear yield type damper portion, a limiting device and a connecting portion. The energy-dissipating restraint support portion and the shear yield type damper portion are arranged in series through the connecting portion, and the limiting device is arranged between the shear yield type damper portion and the connecting portion.

[0007] Furthermore, the constrained energy-absorbing support part includes an energy-absorbing core material, an auxiliary core material, a waterproof asphalt membrane, a filler and a restraining sleeve. The energy-absorbing core material includes an energy-absorbing section in the middle and a connecting section arranged at both ends of the energy-absorbing end. Multiple pieces of auxiliary core materials are evenly arranged on both sides of the energy-absorbing core material connecting section. The surface of the energy-absorbing core material of the energy-absorbing section and the adjacent part of the connecting section is wrapped with a waterproof membrane. The energy-absorbing core material wrapped with the waterproof membrane is firmly constrained by the restraining sleeve filled with filler within its length. At least one energy-absorbing core material is provided, and the auxiliary core material is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material. The chamfer shape is a single-stage chamfer or a multi-stage chamfer.

[0008] Furthermore, the connection part includes an intermediate auxiliary connection plate and an end connection section, the end connection section includes an end auxiliary connection plate and a first stiffening connection plate and a second stiffening connection plate, two second stiffening connection plates are arranged on the first stiffening connection plate, and the cross-sections of the two second stiffening connection plates and the first stiffening connection plate can be "X", "I" or "W" shaped but not limited to these types, one end of the first stiffening connection plate and the second stiffening connection plate are connected to the end auxiliary connection plate, and the other end is connected to the building.

[0009] Furthermore, one end of the energy-consuming core material is connected to the middle auxiliary connecting plate, and the other end is connected to the end connecting section or the building.

[0010] Furthermore, the shear yield type damper part includes a connecting plate, a flange plate, an energy dissipation plate and a reinforcement rib, wherein the connecting plate includes a middle common connecting plate and an edge connecting plate, the flange plates are arranged on both sides of the energy dissipation plate and are symmetrically arranged between the middle common connecting plate and the edge connecting plate, and the reinforcement ribs are arranged on both sides of the middle common connecting plate.

[0011] Furthermore, the left and right ends of the shear yield type damper part can be connected to the middle auxiliary connecting plate or the end auxiliary connecting plate through the middle common connecting plate, and the upper and lower ends can be connected to the end auxiliary connecting plate or the middle auxiliary connecting plate through the upper and lower edge connecting plates; the shear yield type damper part can also be connected to the middle auxiliary connecting plate and the end auxiliary connecting plate or the building respectively through two middle common connecting plates.

[0012] Furthermore, when the left and right ends of the shear yield type damper part are connected to the middle auxiliary connecting plate or the end auxiliary connecting plate through the middle common connecting plate, and the upper and lower ends are connected to the end auxiliary connecting plate or the middle auxiliary connecting plate through the upper and lower edge connecting plates, the middle common connecting plate is spaced a certain distance away from the middle auxiliary connecting plate or the end auxiliary connecting plate connected to the edge connecting plate.

[0013] Furthermore, when the shear yielding damper is connected to the middle auxiliary connecting plate and the end auxiliary connecting plates or the building respectively through the two middle common connecting plates, a certain distance is left between the two middle common connecting plates.

[0014] Furthermore, the limiting device is composed of a limiting plate and a raised platform on the middle common connecting plate, the raised platform is symmetrically arranged on the upper and lower surfaces or the left and right surfaces of the middle common connecting plate, the limiting plate includes a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are arranged circumferentially on the middle common connecting plate, and openings are provided on the two limiting plates opposite to the raised platform, the width of the opening is greater than or equal to the width of the raised platform, the depth of the opening is greater than the depth of the raised platform, and the raised platform has a certain distance from the edge of the hole of the limiting plate in the depth direction / product length direction.

[0015] Furthermore, the limiting plate is fixed to the middle auxiliary connecting plate or the end auxiliary connecting plate.

[0016] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0017] 1. Better energy dissipation characteristics of buckling restrained supports: Generally, conventional buckling restrained supports are provided with a stiffening rib on each side of the connecting section. Under the action of displacement, stress concentration is likely to occur near the end of the stiffening rib. The present invention improves the arrangement of the stiffening ribs of the buckling restrained support, changes the arrangement of one stiffening rib into an arrangement of two stiffening ribs, adjusts the stress-strain distribution of the main core material under displacement, adjusts the maximum strain distribution position of the main core material and reduces the maximum strain of the main core material, thereby improving the energy dissipation effect of the restrained energy dissipation support part.

[0018] 2. It has the mechanical property of graded energy dissipation: Conventional buckling restrained supports tend to remain elastic and are difficult to undergo plastic deformation under small displacements due to their large stiffness. Therefore, it is difficult for conventional buckling restrained supports to play an energy dissipation role under small earthquakes. The present invention introduces a shear yield type damper on the basis of the buckling restrained support, and the shear yield type damper yields and dissipates energy under small earthquakes. At the same time, the displacement range of the shear yield type damper is limited by a limiting device. When the working displacement is greater than the allowable working displacement of the shear yield type damper, the shear yield type damper partially exits the energy dissipation work, and the energy dissipation of the displacement outside the limit is completed by the constrained energy dissipation support part. Thereby achieving the design goal of graded energy dissipation.

[0019] 3. The local stress of the buckling restrained support of this structure under displacement is much lower than that of conventional structures, which can well achieve the requirement of 60 fatigue cycles under 6 to 7 times the ductility ratio. Combined with the mild steel part, the overall structure of this patent can well achieve the performance requirements of low yield displacement, high ductility and high fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the three-dimensional structure of embodiment 1;

[0021] Figures 2 to 5 1 is an isometric view of Example 1;

[0022] Figure 6 Schematic diagram of the three-dimensional structure of Example 2;

[0023] Figures 7 to 12 is an isometric view of Example 2;

[0024] Figure 13 Schematic diagram of the three-dimensional structure of Example 3;

[0025] Figures 14 to 18 1 is an isometric view of Example 3;

[0026] Figure 19 Schematic diagram of the three-dimensional structure of Example 4;

[0027] Figures 20 to 24 1 is an isometric view of Example 4;

[0028] Figure 25 This is a schematic diagram of the three-dimensional structure of Example 5;

[0029] Figures 26 to 30 1 is an isometric view of Example 5;

[0030] Among them, 1 is the constrained energy-absorbing support part, 1-1 is the energy-absorbing core material, 1-2 is the auxiliary core material, 1-3 is the constrained sleeve, and 1-4 is the filler; 2 is the shear yield type damper part, 2-1 is the edge connecting plate, 2-2 is the middle common connecting plate, 2-3 is the flange plate, 2-4 is the energy-absorbing plate, and 2-5 is the reinforcement rib; 3 is the limiting device, 3-1 is the first limiting plate, 3-2 is the second limiting plate, 3-3 is the raised platform, 4 is the middle auxiliary connecting plate, 5 is the end connecting section, 5-1 is the end auxiliary connecting plate, 5-2 is the first stiffening connecting plate, and 5-3 is the second stiffening connecting plate. DETAILED DESCRIPTION

[0031] like Figure 1-30 In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example 1

[0033] A shear yield type buckling restraint support comprises a restrained energy dissipation support portion 1, a shear yield type damper portion 2, a limiting device 3 and a connecting portion. The restrained energy dissipation support portion 1 and the shear yield type damper portion 2 are arranged in series through the connecting portion, and the limiting device 3 is arranged between the shear yield type damper portion 2 and the connecting portion.

[0034] The constrained energy-absorbing support part 1 includes an energy-absorbing core material 1-1, an auxiliary core material 1-2, a waterproof asphalt roll material, a filler 1-4 and a constrained sleeve 1-3. The energy-absorbing core material 1-1 includes an energy-absorbing section in the middle and connecting sections arranged at both ends of the energy-absorbing end. Two pieces of auxiliary core material 1-2 are evenly arranged on each side of the connecting section of the energy-absorbing core material 1-1. The surface of the energy-absorbing core material 1-1 in the energy-absorbing section and the adjacent part of the connecting section is wrapped with waterproof roll material. The energy-absorbing core material 1-1 wrapped with the waterproof roll material is firmly constrained by the constrained sleeve 1-3 filled with filler 1-4 within its length range. One energy-absorbing core material 1-1 is provided, and the auxiliary core material 1-2 is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material 1-1, and the chamfer shape is multi-step chamfer.

[0035] The connection part includes an intermediate auxiliary connection plate 4 and an end connection section 5. The end connection section 5 includes an end auxiliary connection plate 5-1, a first stiffening connection plate 5-2 and a second stiffening connection plate 5-3. Two second stiffening connection plates 5-3 are arranged on the first stiffening connection plate 5-2. One end of the first stiffening connection plate 5-2 and the second stiffening connection plate 5-3 is connected to the end auxiliary connection plate 5-1, and the other end is connected to the building.

[0036] One end of the energy-consuming core material 1-1 is connected to the middle auxiliary connecting plate 4, and the other end is connected to the building.

[0037] The shear yield type damper part 2 includes a connecting plate, a flange plate 2-3, an energy dissipation plate 2-4 and a reinforcing rib 2-5, wherein the connecting plate includes a middle common connecting plate 2-2 and an edge connecting plate 2-1, the flange plate 2-3 is arranged on both sides of the energy dissipation plate 2-4 and is symmetrically arranged between the middle common connecting plate 2-2 and the edge connecting plate 2-1, and the reinforcing rib 2-5 is arranged on both sides of the middle common connecting plate 2-2.

[0038] The left and right ends of the shear yield damper are connected to the middle auxiliary connecting plate 4 through the middle common connecting plate 2-2, and the upper and lower ends are connected to the end auxiliary connecting plates 5-1 through the upper and lower edge connecting plates 2-1;

[0039] The middle common connecting plate 2-2 is spaced a certain distance away from the end auxiliary connecting plate 5-1 connected to the edge connecting plate 2-1.

[0040] The limiting device consists of a limiting plate and a raised platform 3-3 on the middle common connecting plate 2-2. The raised platform 3-3 is symmetrically arranged on the left and right surfaces of the middle common connecting plate 2-2. The limiting plate includes a first limiting plate 3-1 and a second limiting plate 3-2. The first limiting plate 3-1 and the second limiting plate 3-2 are arranged in the circumference of the middle common connecting plate 2-2. Openings are provided on the two limiting plates opposite to the raised platform 3-3. The width of the opening is greater than or equal to the width of the raised platform 3-3, and the depth of the opening is greater than the depth of the raised platform 3-3. The raised platform 3-3 has a certain distance from the edge of the hole of the limiting plate in the depth direction / product length direction.

[0041] The limiting plate is fixed on the end auxiliary connecting plate 5-1.

[0042] Buckling restrained brace has better energy dissipation characteristics: In general, conventional buckling restrained brace has a stiffening rib on each side of the connection section, which is prone to stress concentration near the end of the stiffening rib under displacement. The present invention improves the arrangement of the stiffening ribs of the buckling restrained brace, changes the arrangement of one stiffening rib to the arrangement of two stiffening ribs, adjusts the stress-strain distribution of the main core material under displacement, adjusts the maximum strain distribution position of the main core material and reduces the maximum strain of the main core material, thereby improving the energy dissipation effect of the restrained energy dissipation support part; it has the mechanical characteristics of graded energy dissipation: conventional buckling restrained brace tends to maintain elasticity under small displacement due to its large stiffness and is difficult to undergo plastic deformation. Therefore, it is difficult for conventional buckling restrained brace to play an energy dissipation role under small earthquakes. The present invention introduces a shear yield damper on the basis of the buckling restrained brace, which yields and dissipates energy under small earthquakes. At the same time, the displacement range of the shear yield damper is limited by a limiter. When the working displacement exceeds the allowable working displacement of the shear yield damper, the shear yield damper partially stops dissipating energy, and the constrained energy dissipation support part completes the displacement energy dissipation beyond the limit, thereby achieving the design goal of graded energy dissipation.

[0043] Example 2

[0044] A shear yield type buckling restraint support comprises a restrained energy dissipation support portion 1, a shear yield type damper portion 2, a limiting device 3 and a connecting portion. The restrained energy dissipation support portion 1 and the shear yield type damper portion 2 are arranged in series through the connecting portion, and the limiting device 3 is arranged between the shear yield type damper portion 2 and the connecting portion.

[0045] The constrained energy-absorbing support part 1 includes an energy-absorbing core material 1-1, an auxiliary core material 1-2, a waterproof asphalt roll material, a filler 1-4 and a constrained sleeve 1-3. The energy-absorbing core material 1-1 includes an energy-absorbing section in the middle and connecting sections arranged at both ends of the energy-absorbing end. Two pieces of auxiliary core material 1-2 are evenly arranged on each side of the connecting section of the energy-absorbing core material 1-1. The surface of the energy-absorbing core material 1-1 in the energy-absorbing section and the adjacent part of the connecting section is wrapped with waterproof roll material. The energy-absorbing core material 1-1 wrapped with the waterproof roll material is firmly constrained by the constrained sleeve 1-3 filled with filler 1-4 within its length range. One energy-absorbing core material 1-1 is provided, and the auxiliary core material 1-2 is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material 1-1, and the chamfer shape is a single-stage chamfer.

[0046] The connection part includes an intermediate auxiliary connection plate 4 and an end connection section 5. The end connection section 5 includes an end auxiliary connection plate 5-1, a first stiffening connection plate 5-2 and a second stiffening connection plate 5-3. Two second stiffening connection plates 5-3 are arranged on the first stiffening connection plate 5-2. One end of the first stiffening connection plate 5-2 and the second stiffening connection plate 5-3 is connected to the end auxiliary connection plate 5-1, and the other end is connected to the building.

[0047] One end of the energy-consuming core material 1 - 1 is connected to the middle auxiliary connecting plate 4 , and the other end is connected to the building.

[0048] The shear yield type damper part 2 includes a connecting plate, a flange plate 2-3, an energy dissipation plate 2-4 and a reinforcing rib 2-5, wherein the connecting plate includes a middle common connecting plate 2-2 and an edge connecting plate 2-1, the flange plate 2-3 is arranged on both sides of the energy dissipation plate 2-4 and is symmetrically arranged between the middle common connecting plate 2-2 and the edge connecting plate 2-1, and the reinforcing rib 2-5 is arranged on both sides of the middle common connecting plate 2-2.

[0049] The left and right ends of the shear yield damper are connected to the middle auxiliary connecting plate 4 through the middle common connecting plate 2-2, and the upper and lower ends are connected to the end auxiliary connecting plates 5-1 through the upper and lower edge connecting plates 2-1;

[0050] The middle common connecting plate 2-2 is spaced a certain distance away from the end auxiliary connecting plate 5-1 connected to the edge connecting plate 2-1.

[0051] The limiting device consists of a limiting plate and a raised platform 3-3 on the middle common connecting plate 2-2. The raised platform 3-3 is symmetrically arranged on the upper and lower surfaces of the middle common connecting plate 2-2. The limiting plate includes a first limiting plate 3-1 and a second limiting plate 3-2. The first limiting plate 3-1 and the second limiting plate 3-2 are arranged in the circumference of the middle common connecting plate 2-2. Openings are provided on the two limiting plates opposite to the one with the raised platform 3-3. The width of the opening is greater than or equal to the width of the raised platform 3-3, and the depth of the opening is greater than the depth of the raised platform 3-3. The raised platform 3-3 has a certain distance from the edge of the hole of the limiting plate in the depth direction / product length direction.

[0052] The limiting plate is fixed on the end auxiliary connecting plate 5-1.

[0053] Buckling restrained brace has better energy dissipation characteristics: In general, conventional buckling restrained brace has a stiffening rib on each side of the connection section, which is prone to stress concentration near the end of the stiffening rib under displacement. The present invention improves the arrangement of the stiffening ribs of the buckling restrained brace, changes the arrangement of one stiffening rib to the arrangement of two stiffening ribs, adjusts the stress-strain distribution of the main core material under displacement, adjusts the maximum strain distribution position of the main core material and reduces the maximum strain of the main core material, thereby improving the energy dissipation effect of the restrained energy dissipation support part; it has the mechanical characteristics of graded energy dissipation: conventional buckling restrained brace tends to maintain elasticity under small displacement due to its large stiffness and is difficult to undergo plastic deformation. Therefore, it is difficult for conventional buckling restrained brace to play an energy dissipation role under small earthquakes. The present invention introduces a shear yield damper on the basis of the buckling restrained brace, which yields and dissipates energy under small earthquakes. At the same time, the displacement range of the shear yield damper is limited by a limiter. When the working displacement exceeds the allowable working displacement of the shear yield damper, the shear yield damper partially stops dissipating energy, and the constrained energy dissipation support part completes the displacement energy dissipation beyond the limit, thereby achieving the design goal of graded energy dissipation.

[0054] Example 3

[0055] A shear yield type buckling restraint support comprises a restrained energy dissipation support portion 1, a shear yield type damper portion 2, a limiting device 3 and a connecting portion. The restrained energy dissipation support portion 1 and the shear yield type damper portion 2 are arranged in series through the connecting portion, and the limiting device 3 is arranged between the shear yield type damper portion 2 and the connecting portion.

[0056] The constrained energy-absorbing support part 1 includes an energy-absorbing core material 1-1, an auxiliary core material 1-2, a waterproof asphalt roll material, a filler 1-4 and a constrained sleeve 1-3. The energy-absorbing core material 1-1 includes an energy-absorbing section in the middle and a connecting section arranged at both ends of the energy-absorbing end. Multiple pieces of auxiliary core materials 1-2 are evenly arranged on both sides of the connecting section of the energy-absorbing core material 1-1. The surface of the energy-absorbing core material 1-1 in the energy-absorbing section and the adjacent part of the connecting section is wrapped with a waterproof roll material. The energy-absorbing core material 1-1 wrapped with the waterproof roll material is firmly constrained by the constrained sleeve 1-3 filled with filler 1-4 within its length range. There are two energy-absorbing core materials 1-1, and the auxiliary core material 1-2 is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material 1-1. The chamfer shape can be a single-stage chamfer.

[0057] The connection part includes an intermediate auxiliary connection plate 4 and an end connection section 5. The end connection section 5 includes an end auxiliary connection plate 5-1, a first stiffening connection plate 5-2 and a second stiffening connection plate 5-3. Two second stiffening connection plates 5-3 are arranged on the first stiffening connection plate 5-2. One end of the first stiffening connection plate 5-2 and the second stiffening connection plate 5-3 is connected to the end auxiliary connection plate 5-1, and the other end is connected to the building.

[0058] One end of the energy-consuming core material 1 - 1 is connected to the middle auxiliary connecting plate 4 , and the other end is connected to the building.

[0059] The shear yield type damper part 2 includes a connecting plate, a flange plate 2-3, an energy dissipation plate 2-4 and a reinforcing rib 2-5, wherein the connecting plate includes a middle common connecting plate 2-2 and an edge connecting plate 2-1, the flange plate 2-3 is arranged on both sides of the energy dissipation plate 2-4 and is symmetrically arranged between the middle common connecting plate 2-2 and the edge connecting plate 2-1, and the reinforcing rib 2-5 is arranged on both sides of the middle common connecting plate 2-2.

[0060] The left and right ends of the shear yield type damper can be connected to the end auxiliary connecting plate 5-1 through the middle common connecting plate 2-2, and the upper and lower ends are connected to the middle auxiliary connecting plate 4 through the upper and lower edge connecting plates 2-1;

[0061] When the left and right ends of the shear yield type damper part are connected to the end auxiliary connecting plate 5-1 through the middle common connecting plate 2-2, and the upper and lower ends are connected to the middle auxiliary connecting plate 4 through the upper and lower edge connecting plates 2-1, the middle common connecting plate 2-2 is spaced a certain distance away from the end auxiliary connecting plate 5-1 connected to the edge connecting plate 2-1.

[0062] The limiting device consists of a limiting plate and a raised platform 3-3 on the middle common connecting plate 2-2. The raised platform 3-3 is symmetrically arranged on the left and right surfaces of the middle common connecting plate 2-2. The limiting plate includes a first limiting plate 3-1 and a second limiting plate 3-2. The first limiting plate 3-1 and the second limiting plate 3-2 are arranged in the circumference of the middle common connecting plate 2-2. Openings are provided on the two limiting plates opposite to the raised platform 3-3. The width of the opening is greater than or equal to the width of the raised platform 3-3, and the depth of the opening is greater than the depth of the raised platform 3-3. The raised platform 3-3 has a certain distance from the edge of the hole of the limiting plate in the depth direction / product length direction.

[0063] The limiting plate is fixed on the middle auxiliary connecting plate 4.

[0064] Buckling restrained brace has better energy dissipation characteristics: In general, conventional buckling restrained brace has a stiffening rib on each side of the connection section, which is prone to stress concentration near the end of the stiffening rib under displacement. The present invention improves the arrangement of the stiffening ribs of the buckling restrained brace, changes the arrangement of one stiffening rib to the arrangement of two stiffening ribs, adjusts the stress-strain distribution of the main core material under displacement, adjusts the maximum strain distribution position of the main core material and reduces the maximum strain of the main core material, thereby improving the energy dissipation effect of the restrained energy dissipation support part; it has the mechanical characteristics of graded energy dissipation: conventional buckling restrained brace tends to maintain elasticity under small displacement due to its large stiffness and is difficult to undergo plastic deformation. Therefore, it is difficult for conventional buckling restrained brace to play an energy dissipation role under small earthquakes. The present invention introduces a shear yield damper on the basis of the buckling restrained brace, which yields and dissipates energy under small earthquakes. At the same time, the displacement range of the shear yield damper is limited by a limiter. When the working displacement exceeds the allowable working displacement of the shear yield damper, the shear yield damper partially stops dissipating energy, and the constrained energy dissipation support part completes the displacement energy dissipation beyond the limit, thereby achieving the design goal of graded energy dissipation.

[0065] Example 4

[0066] A shear yield type buckling restraint support comprises a restrained energy dissipation support portion 1, a shear yield type damper portion 2, a limiting device 3 and a connecting portion. The restrained energy dissipation support portion 1 and the shear yield type damper portion 2 are arranged in series through the connecting portion, and the limiting device 3 is arranged between the shear yield type damper portion 2 and the connecting portion.

[0067] The constrained energy-absorbing support part 1 includes an energy-absorbing core material 1-1, an auxiliary core material 1-2, a waterproof asphalt roll material, a filler 1-4 and a constrained sleeve 1-3. The energy-absorbing core material 1-1 includes an energy-absorbing section in the middle and a connecting section arranged at both ends of the energy-absorbing end. Multiple pieces of auxiliary core materials 1-2 are evenly arranged on both sides of the connecting section of the energy-absorbing core material 1-1. The surface of the energy-absorbing core material 1-1 in the energy-absorbing section and the adjacent part of the connecting section is wrapped with a waterproof roll material. The energy-absorbing core material 1-1 wrapped with the waterproof roll material is firmly constrained by the constrained sleeve 1-3 filled with filler 1-4 within its length range. There are two energy-absorbing core materials 1-1, and the auxiliary core material 1-2 is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material 1-1. The chamfer shape can be a single-stage chamfer.

[0068] The connection part includes an intermediate auxiliary connection plate 4 and an end connection section 5. The end connection section 5 includes an end auxiliary connection plate 5-1, a first stiffening connection plate 5-2 and a second stiffening connection plate 5-3. Two second stiffening connection plates 5-3 are arranged on the first stiffening connection plate 5-2. One end of the first stiffening connection plate 5-2 and the second stiffening connection plate 5-3 is connected to the end auxiliary connection plate 5-1, and the other end is connected to the building.

[0069] One end of the energy-consuming core material 1 - 1 is connected to the middle auxiliary connecting plate 4 , and the other end is connected to the building.

[0070] The shear yield type damper part 2 includes a connecting plate, a flange plate 2-3, an energy dissipation plate 2-4 and a reinforcing rib 2-5, wherein the connecting plate includes a middle common connecting plate 2-2 and an edge connecting plate 2-1, the flange plate 2-3 is arranged on both sides of the energy dissipation plate 2-4 and is symmetrically arranged between the middle common connecting plate 2-2 and the edge connecting plate 2-1, and the reinforcing rib 2-5 is arranged on both sides of the middle common connecting plate 2-2.

[0071] The shear yield type damper part can also be connected to the middle auxiliary connecting plate 4 and the end auxiliary connecting plate 5-1 respectively through two middle common connecting plates 2-2.

[0072] When the shear yield type damper part is connected to the middle auxiliary connecting plate 4 and the end auxiliary connecting plate 5-1 respectively through the two middle common connecting plates 2-2, a certain distance is left between the two middle common connecting plates 2-2.

[0073] The limiting device consists of a limiting plate and a raised platform 3-3 on the middle common connecting plate 2-2. The raised platform 3-3 is symmetrically arranged on the left and right surfaces of the middle common connecting plate 2-2. The limiting plate includes a first limiting plate 3-1 and a second limiting plate 3-2. The first limiting plate 3-1 and the second limiting plate 3-2 are arranged in the circumference of the middle common connecting plate 2-2. Openings are provided on the two limiting plates opposite to the raised platform 3-3. The width of the opening is greater than or equal to the width of the raised platform 3-3, and the depth of the opening is greater than the depth of the raised platform 3-3. The raised platform 3-3 has a certain distance from the edge of the hole of the limiting plate in the depth direction / product length direction.

[0074] The limiting plate is fixed on or on the end auxiliary connecting plate 5-1.

[0075] Buckling restrained brace has better energy dissipation characteristics: In general, conventional buckling restrained brace has a stiffening rib on each side of the connection section, which is prone to stress concentration near the end of the stiffening rib under displacement. The present invention improves the arrangement of the stiffening ribs of the buckling restrained brace, changes the arrangement of one stiffening rib to the arrangement of two stiffening ribs, adjusts the stress-strain distribution of the main core material under displacement, adjusts the maximum strain distribution position of the main core material and reduces the maximum strain of the main core material, thereby improving the energy dissipation effect of the restrained energy dissipation support part; it has the mechanical characteristics of graded energy dissipation: conventional buckling restrained brace tends to maintain elasticity under small displacement due to its large stiffness and is difficult to undergo plastic deformation. Therefore, it is difficult for conventional buckling restrained brace to play an energy dissipation role under small earthquakes. The present invention introduces a shear yield damper on the basis of the buckling restrained brace, which yields and dissipates energy under small earthquakes. At the same time, the displacement range of the shear yield damper is limited by a limiter. When the working displacement exceeds the allowable working displacement of the shear yield damper, the shear yield damper partially stops dissipating energy, and the constrained energy dissipation support part completes the displacement energy dissipation beyond the limit, thereby achieving the design goal of graded energy dissipation.

[0076] Example 5

[0077] A shear yield type buckling restraint support comprises a restrained energy dissipation support portion 1, a shear yield type damper portion 2, a limiting device 3 and a connecting portion. The restrained energy dissipation support portion 1 and the shear yield type damper portion 2 are arranged in series through the connecting portion, and the limiting device 3 is arranged between the shear yield type damper portion 2 and the connecting portion.

[0078] The constrained energy-absorbing support part 1 includes an energy-absorbing core material 1-1, an auxiliary core material 1-2, a waterproof asphalt roll material, a filler 1-4 and a constrained sleeve 1-3. The energy-absorbing core material 1-1 includes an energy-absorbing section in the middle and a connecting section arranged at both ends of the energy-absorbing end. Multiple pieces of auxiliary core materials 1-2 are evenly arranged on both sides of the connecting section of the energy-absorbing core material 1-1. The surface of the energy-absorbing core material 1-1 in the energy-absorbing section and the adjacent part of the connecting section is wrapped with a waterproof roll material. The energy-absorbing core material 1-1 wrapped with the waterproof roll material is firmly constrained by the constrained sleeve 1-3 filled with filler 1-4 within its length range. There are two energy-absorbing core materials 1-1, and the auxiliary core material 1-2 is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material 1-1. The chamfer shape can be a single-stage chamfer.

[0079] The connection part includes an intermediate auxiliary connection plate 4 and an end connection section 5. The end connection section 5 includes an end auxiliary connection plate 5-1, a first stiffening connection plate 5-2 and a second stiffening connection plate 5-3. Two second stiffening connection plates 5-3 are arranged on the first stiffening connection plate 5-2. One end of the first stiffening connection plate 5-2 and the second stiffening connection plate 5-3 is connected to the end auxiliary connection plate 5-1, and the other end is connected to the building.

[0080] One end of the energy-dissipating core material 1 - 1 is connected to the middle auxiliary connecting plate 4 , and the other end is connected to the end connecting section 5 .

[0081] The shear yield type damper part 2 includes a connecting plate, a flange plate 2-3, an energy dissipation plate 2-4 and a reinforcing rib 2-5, wherein the connecting plate includes a middle common connecting plate 2-2 and an edge connecting plate 2-1, the flange plate 2-3 is arranged on both sides of the energy dissipation plate 2-4 and is symmetrically arranged between the middle common connecting plate 2-2 and the edge connecting plate 2-1, and the reinforcing rib 2-5 is arranged on both sides of the middle common connecting plate 2-2.

[0082] The shear yield type damper part can also be connected to the middle auxiliary connecting plate 4 and the building respectively through two middle common connecting plates 2-2.

[0083] When the shear yield type damper part is connected to the intermediate auxiliary connecting plate 4 and the building respectively through the two intermediate common connecting plates 2-2, a certain distance is left between the two intermediate common connecting plates 2-2.

[0084] The limiting device consists of a limiting plate and a raised platform 3-3 on the middle common connecting plate 2-2. The raised platform 3-3 is symmetrically arranged on the left and right surfaces of the middle common connecting plate 2-2. The limiting plate includes a first limiting plate 3-1 and a second limiting plate 3-2. The first limiting plate 3-1 and the second limiting plate 3-2 are arranged in the circumference of the middle common connecting plate 2-2. Openings are provided on the two limiting plates opposite to the raised platform 3-3. The width of the opening is greater than or equal to the width of the raised platform 3-3, and the depth of the opening is greater than the depth of the raised platform 3-3. The raised platform 3-3 has a certain distance from the edge of the hole of the limiting plate in the depth direction / product length direction.

[0085] The limiting plate is fixed on the middle auxiliary connecting plate 4.

[0086] Buckling restrained brace has better energy dissipation characteristics: In general, conventional buckling restrained brace has a stiffening rib on each side of the connection section, which is prone to stress concentration near the end of the stiffening rib under displacement. The present invention improves the arrangement of the stiffening ribs of the buckling restrained brace, changes the arrangement of one stiffening rib to the arrangement of two stiffening ribs, adjusts the stress-strain distribution of the main core material under displacement, adjusts the maximum strain distribution position of the main core material and reduces the maximum strain of the main core material, thereby improving the energy dissipation effect of the restrained energy dissipation support part; it has the mechanical characteristics of graded energy dissipation: conventional buckling restrained brace tends to maintain elasticity under small displacement due to its large stiffness and is difficult to undergo plastic deformation. Therefore, it is difficult for conventional buckling restrained brace to play an energy dissipation role under small earthquakes. The present invention introduces a shear yield damper on the basis of the buckling restrained brace, which yields and dissipates energy under small earthquakes. At the same time, the displacement range of the shear yield damper is limited by a limiter. When the working displacement exceeds the allowable working displacement of the shear yield damper, the shear yield damper partially stops dissipating energy, and the constrained energy dissipation support part completes the displacement energy dissipation beyond the limit, thereby achieving the design goal of graded energy dissipation.

[0087] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or layout of the subject combination arrangement. In addition to variations and modifications to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A shear yielding buckling restrained brace, characterized by: The invention comprises a constrained energy dissipation support part (1), a shear yield type damper part (2), a limiting device (3) and a connecting part, wherein the constrained energy dissipation support part (1) and the shear yield type damper part (2) are arranged in series through the connecting part, and the limiting device (3) is arranged between the shear yield type damper part (2) and the connecting part; The constrained energy-absorbing support part (1) includes an energy-absorbing core material (1-1), an auxiliary core material (1-2), a waterproof asphalt roll material, a filler (1-4) and a constrained sleeve (1-3). The energy-absorbing core material (1-1) includes an energy-absorbing section in the middle and connection sections arranged at both ends of the energy-absorbing end. A plurality of auxiliary core materials (1-2) are evenly arranged on both sides of the connection section of the energy-absorbing core material (1-1). The surface of the energy-absorbing section and the adjacent portion of the energy-absorbing core material (1-1) in the connection section is wrapped with a waterproof roll material. The energy-absorbing core material (1-1) wrapped with the waterproof roll material is firmly constrained by the constrained sleeve (1-3) filled with the filler (1-4) within its length. At least one energy-absorbing core material (1-1) is provided, and the auxiliary core material (1-2) is chamfered on the side of the energy-absorbing section close to the energy-absorbing core material (1-1). The chamfer shape is a single-stage chamfer or a multi-stage chamfer. The connection portion comprises an intermediate auxiliary connection plate (4) and an end connection section (5); the end connection section (5) comprises an end auxiliary connection plate (5-1), a first stiffening connection plate (5-2) and a second stiffening connection plate (5-3); two second stiffening connection plates (5-3) are arranged on the first stiffening connection plate (5-2); one end of the first stiffening connection plate (5-2) and the second stiffening connection plate (5-3) are connected to the end auxiliary connection plate (5-1), and the other end is connected to the building; The shear yield type damper part (2) comprises a connecting plate, a flange plate (2-3), an energy dissipation plate (2-4) and a reinforcing rib (2-5), wherein the connecting plate comprises a middle common connecting plate (2-2) and an edge connecting plate (2-1), the flange plate (2-3) is arranged on both sides of the energy dissipation plate (2-4) and is symmetrically arranged with one of the flange plates between the middle common connecting plate (2-2) and the edge connecting plate (2-1), and the reinforcing rib (2-5) is arranged on both sides of the middle common connecting plate (2-2); The limiting device is composed of a limiting plate and a raised platform (3-3) on the middle common connecting plate (2-2), the raised platform (3-3) is symmetrically arranged on the upper and lower surfaces or the left and right surfaces of the middle common connecting plate (2-2), the limiting plate includes a first limiting plate (3-1) and a second limiting plate (3-2), the first limiting plate (3-1) and the second limiting plate (3-2) are arranged in the circumference of the middle common connecting plate (2-2), and openings are provided on the two limiting plates opposite to the one on which the raised platform (3-3) is provided, the width of the opening is greater than or equal to the width of the raised platform (3-3), the depth of the opening is greater than the depth of the raised platform (3-3), and a certain distance is left between the raised platform (3-3) and the hole edge of the limiting plate in the depth direction and the product length direction; One end of the energy-consuming core material (1-1) is connected to the middle auxiliary connecting plate (4), and the other end is connected to the end connecting section (5) or the building; The limiting plate is fixed on the middle auxiliary connecting plate (4) or the end auxiliary connecting plate (5-1).

2. The shear yielding buckling restrained brace according to claim 1, characterized in that: The left and right ends of the shear-yielding damper part are connected to the middle auxiliary connecting plate (4) or the end auxiliary connecting plate (5-1) through the middle common connecting plate (2-2), and the upper and lower ends are connected to the end auxiliary connecting plate (5-1) or the middle auxiliary connecting plate (4) through the upper and lower edge connecting plates (2-1); or the shear-yielding damper part is respectively connected to the middle auxiliary connecting plate (4) and the end auxiliary connecting plate (5-1) or the building through the two middle common connecting plates (2-2).

3. The shear yielding buckling restrained brace according to claim 2, characterized in that: When the left and right ends of the shear yield type damper part are connected to the middle auxiliary connecting plate (4) or the end auxiliary connecting plate (5-1) through the middle common connecting plate (2-2), and the upper and lower ends are connected to the end auxiliary connecting plate (5-1) or the middle auxiliary connecting plate (4) through the upper and lower edge connecting plates (2-1), the middle common connecting plate (2-2) is spaced a certain distance from the middle auxiliary connecting plate (4) or the end auxiliary connecting plate (5-1) connected to the edge connecting plate (2-1).

4. The shear yielding buckling restrained brace according to claim 2, characterized in that: When the shear yield type damper part is connected to the middle auxiliary connecting plate (4) and the end auxiliary connecting plate (5-1) or the building respectively through the two middle common connecting plates (2-2), a certain distance is left between the two middle common connecting plates (2-2).

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