A variable cross-section steel core buckling-restrained brace device

Abstract

This utility model relates to the technical field of energy dissipation and vibration reduction in building engineering, and discloses a variable cross-section steel core buckling-restrained brace device, including a steel core, concrete, and restraint members. The steel core includes a connecting section, a transition section, and a working section. The transition section is connected to both the connecting section and the working section, and the yield strength of the working section is lower than that of the transition section or the connecting section. The restraint members cover the steel core and are connected to the steel core, forming a cavity between the restraint members and the steel core. The concrete is placed inside the cavity and is connected to both the steel core and the restraint members. The concrete is used to reinforce the steel core. The working section restricts the main energy-dissipating parts of the steel core, and the deformation direction of the working section is restrained by the concrete and the restraint members, enabling the working section to dissipate energy along its length, thus improving its energy dissipation capacity. This solves the technical problem of poor energy dissipation effect in the prior art and achieves a better energy dissipation effect for the steel core.

Description

Technical Field

[0001] This utility model relates to the field of energy dissipation and vibration reduction technology in building engineering, and in particular to a variable cross-section steel core buckling restraint support device. Background Technology

[0002] Buckling-restrained braces (BRBs) are key energy-dissipating components widely used in seismic design of building structures. They absorb and dissipate seismic energy through the axial yielding of a metal core, effectively improving the seismic performance of building structures. Compared to traditional braces, BRBs can prevent overall instability during strong earthquakes, possessing both high load-bearing capacity and stable energy dissipation capabilities, and have become an important technical means in modern seismic engineering.

[0003] Existing buckling-restrained braces are made of metal and are generally stretched and bent during earthquakes to dissipate energy. However, the energy dissipation capacity of bent buckling-restrained braces is greatly reduced, and they cannot effectively dissipate earthquake energy, resulting in poor energy dissipation effect. Utility Model Content

[0004] The purpose of this invention is to provide a variable cross-section steel core buckling restraint support device to solve the technical problem of poor energy consumption in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model provides a variable cross-section steel core buckling restraint support device, including a steel core, concrete and restraint components;

[0006] The steel core includes a connecting section, a transition section, and a working section. The transition section is connected to both the connecting section and the working section. The yield strength of the working section is lower than that of the transition section or the connecting section.

[0007] The constraint member covers the steel core and is connected to the steel core. The constraint member and the steel core form a cavity. The concrete is placed in the cavity and is connected to both the steel core and the constraint member. The concrete is used to reinforce the steel core.

[0008] In an optional embodiment, the steel core includes a first core material and a second core material, the first core material and the second core material are arranged perpendicularly and are fixedly connected.

[0009] In an optional embodiment, two second core materials are provided, the two second core materials are disposed on the same plane, the two second core materials are respectively disposed on both sides of the first core material, and the two second core materials are respectively connected to the first core material.

[0010] In an optional implementation, the width of the connecting segment is greater than the width of the transition segment, and the width of the transition segment is greater than the width of the working segment.

[0011] In an optional embodiment, a sealing plate is provided at each end of the constraint member, the sealing plate being connected to the constraint member and used to seal both ends of the constraint member.

[0012] In an optional embodiment, the sealing plate is sleeved on the steel core, and the sealing plate is connected to the steel core.

[0013] In an optional embodiment, the surface of the constraint member is provided with a lifting lug, the lifting lug is fixedly connected to the constraint member, and the lifting lug is provided with a through hole.

[0014] In an optional embodiment, a transition section and a connecting section are respectively provided at both ends of the working segment, the two transition sections are symmetrically arranged, the two connecting sections are symmetrically arranged, and the working segment is connected to the two connecting sections through the two transition sections.

[0015] In an optional embodiment, the surface of the working section is provided with a buffer coating, and the working section is connected to the concrete through the buffer coating.

[0016] In an optional embodiment, the length of the concrete is the same as the length of the constraint member, the two ends of the concrete and the constraint member are flush, and both the concrete and the constraint member are fitted onto the working section and the transition section.

[0017] This utility model provides a variable cross-section steel core buckling restraint support device, comprising a steel core, concrete, and restraint members. The steel core includes a connecting section, a transition section, and a working section. The transition section is connected to both the connecting section and the working section, and the yield strength of the working section is lower than that of the transition section or the connecting section. The restraint members cover the steel core and are connected to it, forming a cavity between the restraint members and the steel core. The concrete is placed within the cavity and is connected to both the steel core and the restraint members. The concrete is used to reinforce the steel core. The working section restricts the main energy-dissipating parts of the steel core, and the deformation direction of the working section is restrained by the concrete and the restraint members, enabling the working section to dissipate energy along its length, thus improving its energy dissipation capacity. This solves the technical problem of poor energy dissipation in existing technologies and achieves better energy dissipation performance for the steel core. Attached Figure Description

[0018] Figure 1 This refers to the variable cross-section steel core buckling restraint support device mentioned in the embodiments of this utility model;

[0019] Figure 2 This is a schematic diagram of the steel core structure mentioned in the embodiments of this utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the constraint member and concrete mentioned in the embodiments of this utility model;

[0021] Figure 4 This is a schematic diagram of the concrete structure mentioned in the embodiments of this utility model;

[0022] Figure 5 This is a schematic diagram of the sealing plate mentioned in the embodiments of this utility model.

[0023] In the diagram, 1-first core material; 2-second core material; 3-constraint; 4-lifting lug; 5-sealing plate; 6-concrete; 7-buffer coating; 8-working section; 9-transition section; 10-connecting section. Detailed Implementation

[0024] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In related technologies, buckling-restrained braces are made of metal and are generally stretched and bent during earthquakes to dissipate energy. However, the energy dissipation capacity of bent buckling-restrained braces is greatly reduced, and they cannot effectively dissipate earthquake energy, resulting in poor energy dissipation effect.

[0027] In view of this, such as Figures 1-5 As shown, some embodiments of this utility model provide a variable cross-section steel core buckling restraint support device, including a steel core, concrete 6, and restraint member 3; the steel core includes a connecting section 10, a transition section 9, and a working section 8, the transition section 9 is connected to the connecting section 10 and the working section 8 respectively, and the yield strength of the working section 8 is lower than that of the transition section 9 or the connecting section 10; the restraint member 3 covers the steel core and is connected to the steel core, forming a cavity between the restraint member 3 and the steel core, the concrete 6 is placed in the cavity, and the concrete 6 is connected to the steel core and the restraint member 3 respectively, and the concrete 6 is used to reinforce the steel core.

[0028] This utility model provides a variable cross-section steel core buckling restraint support device, comprising a steel core, concrete 6, and restraint members 3. The steel core includes a connecting section 10, a transition section 9, and a working section 8. The transition section 9 is connected to both the connecting section 10 and the working section 8. The yield strength of the working section 8 is lower than that of the transition section 9 or the connecting section 10. The restraint members 3 cover the steel core and are connected to it, forming a cavity between them. The concrete 6 is placed within the cavity and is connected to both the steel core and the restraint members 3. The concrete 6 is used to reinforce the steel core. The working section 8 restricts the main energy-dissipating parts of the steel core, and the concrete 6 and restraint members 3 constrain the deformation direction of the working section 8, enabling it to dissipate energy along its length, thus improving its energy dissipation capacity. This solves the technical problem of poor energy dissipation in the prior art and achieves better energy dissipation performance of the steel core.

[0029] In an optional embodiment, the steel core includes a first core material 1 and a second core material 2, which are arranged vertically and fixedly connected. Two second core materials 2 are provided, positioned on the same plane and respectively on opposite sides of the first core material 1, and connected to the first core material 1. The width of the connecting section 10 is greater than the width of the transition section 9, which is greater than the width of the working section 8. A sealing plate 5 is provided at each end of the constraint member 3, connected to the constraint member 3, and used to seal both ends of the constraint member 3. The sealing plate 5 is fitted onto the steel core and connected to it. A lifting lug 4 is provided on the surface of the constraint member 3, fixedly connected to it, and has a through hole.

[0030] In an optional embodiment, a transition section 9 and a connecting section 10 are respectively provided at both ends of the working section 8. The two transition sections 9 are symmetrically arranged, and the two connecting sections 10 are symmetrically arranged. The working section 8 is connected to the two connecting sections 10 through the two transition sections 9. A buffer coating 7 is provided on the surface of the working section 8, and the working section 8 is connected to the concrete 6 through the buffer coating 7. The length of the concrete 6 is the same as the length of the constraint member 3. The two ends of the concrete 6 and the constraint member 3 are flush. The concrete 6 and the constraint member 3 are both fitted onto the working section 8 and the transition section 9.

[0031] The method for fabricating and installing the variable cross-section steel core buckling restraint brace can be as follows:

[0032] Step 1: In the structural design of buckling-restrained braces, the connecting section 10, transition section 9, and working section 8 of the steel core are all designed as a cross-shaped section with weakened cross sections, that is, the first core material 1 is perpendicular to the second core material 2, the first core material 1 and the second core material 2 can be welded, the working section 8 is used to preferentially yield and dissipate energy under seismic action, and the two ends are made of high-strength steel or thickened cross sections of the connecting section 10 and transition section 9 to ensure that the node connection area remains elastic.

[0033] Step 2: The restraint member 3 is formed by butt-welding four high-strength steel angle steels into a "mouth" shape structure to wrap the steel core. Both ends of the restraint member 3 are located on the transition section, ensuring that the concrete 6 can cover the working section 8. Ultra-high performance concrete 6 is filled in the middle as the restraint medium to enhance the stiffness and stability of the working section 8 and limit the deformation direction of the working section 8.

[0034] The restraint member 3 wraps the steel core and provides lateral restraint to prevent the steel core from bending under compression. The four limbs of the restraint member 3 are connected by welds, and the ends are reinforced and welded with end plates 5 to ensure the overall stiffness and stability. The welding process of the restraint member 3 is simple, supporting factory prefabrication production to reduce on-site assembly time.

[0035] Step 3: A buffer coating 7 made of non-bonding materials such as silica gel and rubber is provided between the steel core and the restraint member 3 to ensure that the steel core can deform freely to a certain extent and reduce the friction with the concrete 6. A transition section 9 is provided between the working section 8 and the end connection section 10 of the steel core to reduce stress concentration through gradually changing cross-sectional dimensions. The buffer coating 7 uses polyethylene film, which has a low friction coefficient, low cost, and convenient construction.

[0036] Step 4: Low-yield-point steel or ordinary steel is selected for the steel core material, and high-strength steel is used for the end nodes to improve the bearing capacity. Low-yield-point steel has excellent ductility and hysteretic energy dissipation capacity, and can absorb energy through plastic deformation under repeated loads to avoid brittle fracture. Its yield strength is low, which is suitable for the core material of buckling-restrained braces and can effectively reduce local stress concentration caused by construction errors.

[0037] Step 5: Ultra-high performance concrete 6 is used for part of the concrete 6, and its compressive strength can reach more than 150 MPa, with both high fluidity and self-compacting properties, which can fill the voids of complex cross-sections and compensate for construction errors.

[0038] Step 6: The cutting of the steel core can be prefabricated in the factory, and the size and groove form can be controlled to avoid wasting time in on-site cutting. In terms of welding, low-hydrogen electrodes should be used, symmetric welding should be adopted to prevent deformation, and strict flaw detection inspections should be carried out. At the same time, different cutting and welding processes are required for steel cores with different cross-sectional forms. For example, higher precision is required for the cross welds of cruciform core materials. The quality stability of the core material cutting is improved through standardized processes and intelligent equipment (such as numerical control cutting and robotic welding).

[0039] Step 7: The restraint member 3 is sleeved on the transition section 9 and the working section 8 of the steel core part, the buffer coating 7 is filled, and ultra-high performance concrete 6 is injected through the grouting hole to form a closed cavity to enhance the overall restraint. The processed steel core is inserted into the restraint member 3, and both ends are welded and sealed with end plates 5. The end plates 5 are welded to the restraint member 3 and the steel core respectively.

[0040] Step 8: The gusset plates are welded, and the embedded parts are positioned using 3D simulation technology and installed in conjunction with the beams and columns. E50 series welding rods or special low-hydrogen welding materials are used to reduce the risk of hydrogen-induced cracking. Symmetrical segmented back-welding is used for the cross-shaped core material cross welds to control thermal deformation and avoid core material distortion.

[0041] Step 9: During hoisting, use the lifting lug 4 and the chain hoist passing through the through hole of the lifting lug 4 to adjust the support posture and ensure accurate alignment. The welding sequence should follow the principle of welding the web plate first and then the stiffening ribs to control deformation.

[0042] Step 10: The bevel of the core material end must be perfectly matched with the bevel of the node plate, with a gap ≤2mm, to avoid incomplete fusion defects. Welding sequence: Weld the lower node of the core material first, then weld the upper node, using temporary clamps for fixation to reduce residual stress.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable cross-section steel core buckling restraint support device, characterized in that, Includes steel core, concrete, and restraints; The steel core includes a connecting section, a transition section, and a working section. The transition section is connected to both the connecting section and the working section. The yield strength of the working section is lower than that of the transition section or the connecting section. The constraint member covers the steel core and is connected to the steel core. The constraint member and the steel core form a cavity. The concrete is placed in the cavity and is connected to both the steel core and the constraint member. The concrete is used to reinforce the steel core.

2. The variable cross-section steel core buckling restraint support device according to claim 1, characterized in that, The steel core includes a first core material and a second core material, which are arranged perpendicularly and are fixedly connected.

3. The variable cross-section steel core buckling restraint support device according to claim 2, characterized in that, There are two second core materials, which are arranged on the same plane. The two second core materials are respectively arranged on both sides of the first core material and are respectively connected to the first core material.

4. The variable cross-section steel core buckling restraint support device according to claim 1, characterized in that, The width of the connecting segment is greater than the width of the transition segment, and the width of the transition segment is greater than the width of the working segment.

5. The variable cross-section steel core buckling restraint support device according to claim 1, characterized in that, A sealing plate is provided at each end of the constraint member, the sealing plate is connected to the constraint member, and the sealing plate is used to seal the two ends of the constraint member.

6. The variable cross-section steel core buckling restraint support device according to claim 5, characterized in that, The sealing plate is sleeved on the steel core, and the sealing plate is connected to the steel core.

7. The variable cross-section steel core buckling restraint support device according to claim 1, characterized in that, The surface of the constraint member is provided with a lifting lug, which is fixedly connected to the constraint member, and the lifting lug is provided with a through hole.

8. The variable cross-section steel core buckling restraint support device according to claim 1, characterized in that, The working segment is provided with a transition segment and a connecting segment at each end. The two transition segments are symmetrically arranged, and the two connecting segments are symmetrically arranged. The working segment is connected to the two connecting segments through the two transition segments.

9. The variable cross-section steel core buckling restraint brace according to any one of claims 1-8, characterized in that, The surface of the working section is provided with a buffer coating, and the working section is connected to the concrete through the buffer coating.

10. The variable cross-section steel core buckling restraint support device according to claim 9, characterized in that, The length of the concrete is the same as the length of the constraint member, and the two ends of the concrete and the constraint member are flush. The concrete and the constraint member are both fitted onto the working section and the transition section.

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