Buckling restrained brace with locking device

Abstract

The invention discloses a buckling restrained brace with a locking device, and relates to the technical field of buckling restrained braces.The buckling restrained brace is characterized in that a restraining component of the buckling restrained brace is arranged on the outer side of an energy consumption core in a sleeving mode, end plates comprise the bottom end plate and the top end plate, and the restraining component and the energy consumption core are welded to the bottom end plate; the energy consumption core and the end sleeve are welded to the top end plate. The locking device is fixed on the inner side of the end sleeve; the two limiting pieces are fixed to the outer side of the restraining component, and the locking device is located between the two limiting pieces. When the locking device moves along with the end sleeve and makes contact with any limiting piece on the two sides, the locking device returns to the initial zero position under the reciprocating earthquake effect, the locking device plays a locking role, and the relative movement of the end sleeve and the restraining component is limited. A reciprocating action mechanism of an earthquake load is combined with a locking device to realize self-resetting. After the locking device is triggered, the supporting rigidity and the bearing capacity are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel frame structures, and in particular to a buckling restraint brace with a locking device. Background Art

[0002] Buckling restrained brace is a commonly used energy dissipation and shock absorption component, which is mainly composed of an energy dissipation core and an external restraint component. A restraint component is set outside the energy dissipation core to prevent the core from being completely unstable under compression, thereby achieving stable energy dissipation under tension and compression. The energy dissipation core is often made of low yield point steel, and the energy input from the earthquake is dissipated through the plastic tension and compression deformation of the energy dissipation core. The restraint component generally adopts pure steel or steel-concrete composite structure, which has large bending stiffness and can provide strong lateral restraint for the energy dissipation core. The failure of the buckling restrained brace is usually caused by the fracture failure of the energy dissipation core, at which time the restraint component is basically in an elastic and damage-free state. In addition, in order to cope with earthquakes of different intensity levels, a buckling restrained brace with double-order or multi-order yield energy dissipation is proposed. Its basic principle is to achieve multiple yield energy dissipation of the buckling restrained brace by connecting energy dissipation cores with different load-bearing and energy dissipation capacities in series and parallel.

[0003] For frame structures, the limit of the residual inter-story displacement angle that can be repaired is 0.5%. When the residual deformation of the structure exceeds this limit, the cost and difficulty of post-earthquake repair of the structure are relatively high. In order to reduce the residual deformation of the structure and facilitate post-earthquake repair work, a self-resetting device is usually introduced on the basis of the above-mentioned buckling restrained support to make it rebound to the initial zero position after the earthquake action ends. The self-resetting device can be made of prestressed steel strands, springs or disc springs, etc., and through its own elastic restoring force, it enables the support to rebound to the initial zero position after the energy-absorbing core yields.

[0004] However, the buckling restrained braces of existing frame structures have the following disadvantages:

[0005] (1) When the buckling restraint support is damaged, the restraint member is basically in an elastic and undamaged state, which greatly wastes the bearing capacity of the restraint member, especially its axial bearing capacity cannot be fully utilized.

[0006] (2) The construction measures to achieve self-reset through prestressing are relatively complex, and the actual prestressing process is complex and difficult. In addition, there is a problem of prestress loss during long-term use, which affects the realization of the self-reset function. Summary of the invention

[0007] 1. Technical issues to be resolved

[0008] In view of the deficiencies in the prior art, the present invention provides a buckling restrained brace with a locking device to solve at least one technical problem raised in the background art.

[0009] (II) Technical solution

[0010] In order to achieve the above object, the technical solution adopted by the present invention is: a buckling restrained support with a locking device, the buckling restrained support comprising:

[0011] Constraint components;

[0012] An energy dissipation core, wherein the restraining member is sleeved on the outside of the energy dissipation core, and a gap is provided between the restraining member and the energy dissipation core;

[0013] An end plate, the end plate comprising a bottom end plate and a top end plate, wherein the restraining member and one end of the energy dissipation core are welded to the bottom end plate;

[0014] An end sleeve, wherein the restraining member and the other end of the energy-consuming core are inserted into the end sleeve, and the other end of the energy-consuming core and the end of the end sleeve are both welded to the top end plate;

[0015] a locking device, the locking device being fixed to the inner side of the end sleeve;

[0016] A limiting member, wherein there are two limiting members, and both limiting members are fixed to the outer side of the restraining member;

[0017] Wherein, the locking device is located between the two limit members; after the locking device follows the movement of the end sleeve and contacts any limit member on both sides, and returns to the initial zero position under the action of reciprocating earthquake, the locking device plays a locking role to limit the relative movement of the end sleeve and the constraint member.

[0018] Preferably, the locking device comprises:

[0019] a locking ring fixed to the inner side of the end sleeve;

[0020] A plurality of push rods are arranged in the locking ring along the annular direction, and the push rods can be ejected to the outside of the locking ring.

[0021] Preferably, the locking device comprises:

[0022] A locking ring stores high-pressure gas or liquid inside the locking ring, and the high-pressure gas or liquid stored inside the locking ring can be released and fill the cavities on both sides of the locking device, thereby limiting the displacement of the locking device.

[0023] Preferably, an equal distance is preset between the locking device and the two limiting members.

[0024] Preferably, the restraining member and the energy dissipation core are made of round steel pipes.

[0025] Preferably, the buckling restraint support further comprises:

[0026] The internal reinforcement tube is located in the energy dissipation core, and the top of the internal reinforcement tube is welded to the top end plate, and the other end of the internal reinforcement tube extends into the restraining component.

[0027] Preferably, the restraining member is a square steel tube, and the cross-section of the energy dissipation core is a cross shape.

[0028] Preferably, concrete is filled between the restraining member and the energy dissipation core.

[0029] Preferably, the ejector rod is ejected to the outside of the locking ring by pneumatic or hydraulic means.

[0030] (III) Beneficial effects

[0031] The present invention provides a buckling restraint support with a locking device, which has the following beneficial effects compared with the prior art:

[0032] The bearing capacity of the restraining member is fully utilized through the limiter and the locking device. Under extreme earthquake conditions, the bearing capacity of the restraining member is fully utilized to achieve a leap in the seismic performance of the buckling restrained support. The reciprocating action mechanism of the seismic load is used to achieve self-reset in combination with the locking device. After the locking device is triggered, the stiffness and bearing capacity of the support are significantly improved. When the external load does not exceed the yield load after locking, the support can achieve no residual deformation in an ideal situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0034] Figure 1 This is a schematic diagram of the overall structure of the first structure of an embodiment of the present invention;

[0035] Figure 2 This is an exploded schematic diagram of the first structure of an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the assembly of the first structure of an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the end sleeve structure of the first structure of an embodiment of the present invention;

[0038] Figure 5 A schematic diagram of a locking device of a first structure according to an embodiment of the present invention;

[0039] Figure 6 This is a schematic diagram of the overall structure of the second structure of an embodiment of the present invention;

[0040] Figure 7 This is an exploded schematic diagram of a second structure of an embodiment of the present invention;

[0041] Figure 8 This is a schematic diagram of the assembly of the second structure of an embodiment of the present invention;

[0042] Fig. 9 This is a schematic diagram of the end sleeve structure of the second structure of an embodiment of the present invention;

[0043] Fig.10 A schematic diagram of a locking device of a second structure according to an embodiment of the present invention;

[0044] Fig.11 is the theoretical load-displacement relationship for a buckling-restrained brace with locking device;

[0045] Among them, there are a bottom end plate 101, a top end plate 102, a restraining member 2, an end sleeve 3, an energy-absorbing core 4, a locking device 5, a locking ring 501, a top rod 502, a limiter 6, and an internal reinforcement tube 7. Specific implementation methods

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0048] As the instruction manual Figure 1-Figure 11 As shown, the present invention provides a buckling restraint support with a locking device, the buckling restraint support comprises a restraint member 2, an energy dissipation core 4, an end plate, an end sleeve 3, a locking device 5 and a stopper 6, the restraint member 2 is sleeved on the outside of the energy dissipation core 4, and there is a gap between the restraint member 2 and the energy dissipation core 4; the end plate comprises a bottom end plate 101 and a top end plate 102, wherein the restraint member 2 and one end of the energy dissipation core 4 are welded to the bottom end plate 101;

[0049] The other end of the restraining member 2 and the energy-absorbing core 4 are inserted into the end sleeve 3, and the other end of the energy-absorbing core 4 and the end of the end sleeve 3 are welded to the top end plate 102; the locking device 5 is fixed to the inner side of the end sleeve 3; there are two limiting members 6, and the two limiting members 6 are fixed to the outer side of the restraining member 2; specifically, the end sleeve 3 is tightly fitted with the limiting member 6, and the locking device 5 is tightly fitted with the energy-absorbing core 4.

[0050] Among them, the locking device 5 is located between the two limit members 6; after the locking device 5 follows the movement of the end sleeve 3 and contacts with any limit member 6 on both sides, and returns to the initial zero position under the action of reciprocating earthquake, the locking device 5 plays a locking role to limit the relative movement of the end sleeve 3 and the constraint member 2.

[0051] Furthermore, an equal distance is preset between the locking device 5 and the two limiting members 6 .

[0052] The specific working process of the above embodiment is as follows: under the action of the reciprocating load of the earthquake, in the initial state, the locking device 5 is located between the two limit members 6 and has a gap, that is, before the locking device 5 contacts the limit members 6 on both sides, the working performance of the support is exactly the same as that of the ordinary buckling restraint support. The seismic energy is dissipated through the reciprocating plastic deformation of the energy dissipation core 4. When the locking device 5 follows the movement of the end sleeve 3 and contacts any limit member 6 on both sides, the locking device 5 is activated; under the continuous action of the reciprocating load of the earthquake, the locking device 5 will return to the initial state at a certain moment, when the locking device 5 is triggered. The locking device 5 is locked in the initial state position, and the end sleeve 3 and the constraint member 2 no longer have relative movement. The constraint member 2 and the energy dissipation core 4 jointly bear the axial load, and the support stiffness and bearing capacity are significantly improved.

[0053] The activation and triggering of the locking device 5 can be achieved through the electronic control system integrated in the support. A pressure sensor is set on the limiter 6. When the pressure value reaches the set value, the system issues a command to activate the locking device. A displacement sensor is set on the locking device 5. When the locking device 5 returns to the initial state position, the system issues a command to trigger the locking device 5. Specifically, the activation and triggering of the locking device 5 can also be achieved through a mechanical device.

[0054] Furthermore, the embodiment of the present invention provides two ways to realize locking of the locking device 5, that is, two ways to realize the constraint of the relative movement between the end sleeve 3 and the constraint member 2, specifically:

[0055] like Figure 5 and Fig.10 As shown, the first structure is: the locking device 5 includes a locking ring 501 and a push rod 502, the locking ring 501 is fixed to the inner side of the end sleeve 3; a plurality of push rods 502 are arranged in the locking ring 501 along the circumferential direction, and the push rods 502 can be popped out of the locking ring 501. Specifically, when the push rod 502 is popped out, it will hold the limit members 6 on both sides, thereby realizing the constraint of the relative movement between the end sleeve 3 and the constraint member 2. In the above embodiment, the push rod 502 is popped out to the outside of the locking ring 501 by pneumatic or hydraulic means, and those skilled in the art can also choose other methods, as long as the push rod 502 can be popped out and hold the limit member 6.

[0056] The second structure is that the locking device 5 includes a locking ring 501, and the locking ring 501 stores high-pressure gas or liquid inside, and the high-pressure gas or liquid stored inside the locking ring 501 can be released and fill the cavities on both sides of the locking device, thereby limiting the displacement of the locking device 5. High-pressure gas or liquid is stored inside the locking ring 501, and after being triggered, it is released and fills the cavities on both sides of the locking device, thereby limiting the displacement of the locking device 5 along the axial direction of the rod, thereby achieving a locking effect.

[0057] Furthermore, the restraining member 2 and the energy dissipation core 4 in the embodiment of the present invention are made of round steel tubes, and may also be made of square tube structures.

[0058] like Figure 1-Figure 5 As shown, when the restraining member 2 and the energy dissipation core 4 are made of round steel pipes, correspondingly, the end sleeve 3 and the locking ring 501 also adopt a structure with a circular cross section.

[0059] For the restraining member 2 and the energy dissipation core 4 of the circular steel tube structure, the buckling restraint support further includes an internal reinforcement tube 7, which is located in the energy dissipation core 4, and the top of the internal reinforcement tube 7 is welded to the top end plate 102. The internal reinforcement tube 7 is located in the energy dissipation core 4, and the other end extends into the restraining member 2 to ensure the strength and stability of the extended part of the energy dissipation core 4. The internal reinforcement tube 7 plays an internal reinforcement role, and the internal reinforcement tube 7 is a little longer when extending to the restraining member 2, and overlaps with the restraining member 2.

[0060] like Figure 6-Figure 10 As shown, when the restraining member 2 is a square steel tube and the cross section of the energy dissipation core 4 is a cross, the space between the restraining member 2 and the energy dissipation core 4 is filled with concrete.

[0061] like Fig.11 The figure shows a simplified diagram of the load-displacement relationship of a buckling restraint support with a locking device. It can be seen from the figure that after the locking device is triggered, the stiffness and bearing capacity of the support are significantly improved. When the external load does not exceed the yield load after locking, the support can achieve no residual deformation in an ideal situation. It should be noted that at this time, the energy-consuming core inside the support has undergone a large plastic deformation process.

[0062] The beneficial effects brought by the present invention are:

[0063] (1) The bearing capacity of the restraining member is fully utilized through the limiter and the locking device. Under extreme earthquake conditions, the bearing capacity of the restraining member is fully utilized to achieve a leap in the seismic performance of the buckling restrained brace. At this time, the energy-absorbing core inside the brace has undergone a large plastic deformation process.

[0064] (2) The reciprocating action mechanism of the seismic load is combined with a locking device to achieve self-reset. Self-reset can be achieved without applying prestress. After the locking device is triggered, the stiffness and bearing capacity of the support are significantly improved. When the external load does not exceed the yield load, the support has no residual deformation.

[0065] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A buckling restrained brace with a locking device, characterized in that: The buckling restrained support comprises: Constraint member (2); An energy dissipation core (4), wherein the restraining member (2) is sleeved on the outside of the energy dissipation core (4), and a gap is provided between the restraining member (2) and the energy dissipation core (4); An end plate, the end plate comprising a bottom end plate (101) and a top end plate (102), wherein the restraining member (2) and one end of the energy dissipation core (4) are welded to the bottom end plate (101); An end sleeve (3), the restraining member (2) and the other end of the energy-consuming core (4) are inserted into the end sleeve (3), and the other end of the energy-consuming core (4) and the end of the end sleeve (3) are both welded to the top end plate (102); A locking device (5), wherein the locking device (5) is fixed to the inner side of the end sleeve (3); A limiting member (6), wherein two limiting members (6) are provided, and both limiting members (6) are fixed to the outer side of the restraining member (2); The locking device (5) is located between the two limiting members (6); after the locking device (5) follows the movement of the end sleeve (3) and contacts any of the limiting members (6) on both sides, and returns to the initial zero position under the action of reciprocating earthquakes, the locking device (5) plays a locking role, limiting the relative movement of the end sleeve (3) and the restraining member (2).

2. The buckling restrained brace with locking device according to claim 1, characterized in that: The locking device (5) comprises: A locking ring (501), the locking ring (501) being fixed to the inner side of the end sleeve (3); A plurality of push rods (502) are arranged in a ring direction inside the locking ring (501), and the push rods (502) can be ejected to the outside of the locking ring (501).

3. The buckling restrained brace with locking device according to claim 1, characterized in that: The locking device (5) comprises: A locking ring (501) stores high-pressure gas or liquid inside the locking ring (501), and the high-pressure gas or liquid stored inside the locking ring (501) can be released and fill the cavities on both sides of the locking device, thereby limiting the displacement of the locking device (5).

4. The buckling restrained brace with locking device according to claim 1, characterized in that: An equal distance is preset between the locking device (5) and the two limiting members (6).

5. The buckling restrained brace with locking device according to claim 1, characterized in that: The restraining member (2) and the energy dissipation core (4) are made of round steel pipes.

6. The buckling restrained brace with locking device according to claim 5, characterized in that: The buckling restrained support further comprises: An internal reinforcement tube (7), the internal reinforcement tube (7) is located in the energy-absorbing core (4), and the top of the internal reinforcement tube (7) is welded to the top end plate (102), and the other end of the internal reinforcement tube (7) extends into the restraining member (2).

7. The buckling restrained brace with locking device according to claim 1, characterized in that: The restraining member (2) is made of a square steel tube, and the cross section of the energy dissipation core (4) is a cross.

8. The buckling restrained brace with locking device according to claim 7, characterized in that: Concrete is filled between the restraining member (2) and the energy dissipation core (4).

9. The buckling restrained brace with locking device according to claim 2, characterized in that: The ejector rod (502) is ejected to the outside of the locking ring (501) by pneumatic or hydraulic means.

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