Buckling restraint support device

Abstract

The present invention discloses a buckling restraint support device, comprising an outer restraint tube, an inner core energy-absorbing tube, an inner restraint tube and an end plate, wherein the end plate is vertically fixed at both ends of the inner core energy-absorbing tube; the outer restraint tube is concentrically sleeved on the outside of the inner core energy-absorbing tube, and the inner restraint tube is concentrically sleeved inside the inner core energy-absorbing tube; wherein the outer restraint tube and the inner restraint tube are both circular GFRP tubes, and the inner core energy-absorbing tube is a circular aluminum alloy tube; in the present invention, the inner restraint tube and the outer restraint tube are respectively sleeved on the inside and outside of the inner core energy-absorbing tube, the inner core energy-absorbing tube is a circular aluminum alloy tube, and the outer restraint tube and the inner restraint tube are both circular GFRP tubes; aluminum alloy is used as the core material, and glass fiber composite material is used to construct the external restraint, fully exploring the performance advantages of the two materials, making it light and efficient, green and environmentally friendly, cold-resistant and corrosion-resistant, and alleviating the disadvantages of traditional buckling restraint supports such as heavy weight, frequent wet operations and high subsequent maintenance costs.

Description

Technical Field

[0001] The invention belongs to the technical field of energy dissipation and shock absorption of building structures, and in particular relates to a buckling restraint support device. Background Art

[0002] A buckling-restrained brace is a new type of energy-absorbing and shock-absorbing component with excellent performance. It has the axial stiffness of an ordinary brace and can absorb a large amount of energy input into the entire system. During tension, the mechanical properties of the buckling-restrained brace are basically the same as those of an ordinary brace. During compression, the buckling-restrained brace uses peripheral constraint units to constrain the buckling of the core material, causing the entire cross-section of the core material to yield under the action of repeated tension and compression loads, thereby utilizing the core material's excellent plastic deformation capacity to dissipate seismic energy.

[0003] According to the different material forms and manufacturing processes of the restraining components, buckling restrained braces can be divided into concrete-type buckling restrained braces, all-steel buckling restrained braces and new material buckling restrained braces. Traditional buckling restrained braces mostly use steel tube concrete or pure steel as external restraining components. Steel tube concrete external restraining components have disadvantages such as heavy weight and frequent wet operations, while pure steel restraining components are prone to corrosion and have high subsequent maintenance costs. Summary of the Invention

[0004] In response to the technical problems existing in the prior art, the present invention provides a buckling restraint support device to solve the technical problems of traditional buckling restraint supports such as heavy weight, frequent wet operations, easy corrosion of components and high subsequent maintenance costs.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] The present invention provides a buckling restraint support device, comprising an outer restraint tube, an inner core energy dissipation tube, an inner restraint tube and end plates, wherein the end plates are vertically fixed to both ends of the inner core energy dissipation tube;

[0007] The outer constraint tube is concentrically sleeved on the outside of the inner core energy-absorbing tube, and the inner constraint tube is concentrically sleeved inside the inner core energy-absorbing tube; wherein, the outer constraint tube and the inner constraint tube are both circular GFRP tubes, and the inner core energy-absorbing tube is a circular aluminum alloy tube.

[0008] Furthermore, it also includes a blind rivet; a plurality of first limiting holes are evenly opened on the middle circumference of the outer constraint tube, a plurality of second limiting holes are evenly set on the middle circumference of the inner core energy-consuming tube, and a plurality of third limiting holes are evenly opened on the middle circumference of the inner constraint tube; wherein, the first limiting hole, the second limiting hole and the third limiting hole are arranged in one-to-one correspondence; the blind rivet is arranged to pass through the first limiting hole, the second limiting hole and the third limiting hole in sequence to fix the outer constraint tube, the inner core energy-consuming tube and the inner constraint tube together.

[0009] Furthermore, it also includes a first gasket and a second gasket; the first gasket is arranged between the outer constraint tube and the inner core energy-consuming tube, and is located between the first limiting hole and the second limiting hole; the second gasket is arranged between the inner core energy-consuming tube and the inner constraint tube, and is located corresponding to the second limiting hole and the third limiting hole; wherein, the first gasket and the second gasket are both annular flexible gasket structures, and the blind rivet is arranged through the first gasket and the second gasket.

[0010] Furthermore, a cross-shaped notch is respectively formed at both ends of the outer restraint tube; wherein the cross-shaped notch includes four opening slots, the four opening slots are distributed in a cross-shaped structure on the end circumference of the outer restraint tube, and the intersection of the four opening slots is located on the longitudinal axis of the outer restraint tube;

[0011] Four stiffening ribs are evenly arranged on the outer circumferential surface of the end of the inner core energy-absorbing tube, and the four stiffening ribs are arranged in one-to-one correspondence with the four open grooves; wherein, one end of the stiffening rib is vertically fixed to the outer circumferential surface of the end of the inner core energy-absorbing tube, and the other end of the stiffening rib extends away from the center direction of the inner core energy-absorbing tube.

[0012] Furthermore, the length of the open slot is equal to the distance between the end of the inner constraint tube and the end of the inner core energy dissipation tube;

[0013] The reinforcing rib is a rectangular aluminum sheet, the end of the reinforcing rib is flush with the end of the inner core energy-absorbing tube, and the length of the reinforcing rib is smaller than the length of the opening slot.

[0014] Furthermore, the inner core energy dissipation tube is provided with a plurality of deformation notch groups, and the plurality of deformation notch groups are evenly distributed along the longitudinal axis of the inner core energy dissipation tube;

[0015] Each of the deformed notch groups includes four rectangular notches, which are distributed in a cross-shaped structure on the circumference of the inner core energy-consuming tube, and the intersection of the four rectangular notches is located on the longitudinal axis of the inner core energy-consuming tube.

[0016] Furthermore, there are four deformation notch groups opened on the inner core energy dissipation tube; the four deformation notch groups are evenly distributed along the longitudinal axis of the inner core energy dissipation tube and are symmetrically arranged about the midpoint of the inner core energy dissipation tube.

[0017] Furthermore, the length dimension L1 of the outer constraint tube is smaller than the length dimension L3 of the inner constraint tube, and the length dimension L3 of the inner constraint tube is smaller than the length dimension L2 of the inner core energy-absorbing tube; wherein, the distance between the end of the inner constraint tube and the end of the inner core energy-absorbing tube is greater than the axial deformation length of the inner core energy-absorbing tube.

[0018] Furthermore, it also includes a connecting portion, which is arranged on the outside of the end plate; wherein one end of the connecting portion is fixedly connected to the end plate, and the other end of the connecting portion is used to be connected to the building structure.

[0019] Furthermore, the connection portion and the end plate are fixedly connected by bolts, and the end plate and the end of the inner core energy-absorbing tube are fixed by welding; wherein the bolts are steel bolts.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention provides a buckling restraint support device, in which an inner restraint tube and an outer restraint tube are respectively installed inside and outside an inner core energy-consuming tube. The inner core energy-consuming tube adopts a circular aluminum alloy tube, which is light in weight, corrosion-resistant, easy to manufacture, and has relatively low energy consumption. It has strong green and environmental protection effects, can be recycled, and has good economic and environmental benefits. The outer restraint tube and the inner restraint tube both adopt circular GFRP tubes, that is, glass fiber reinforced plastics, which have the advantages of light weight, high tensile strength, corrosion resistance, aging resistance and good insulation. In the present invention, aluminum alloy is used as the core material, and glass fiber composite materials are used to construct the external restraint, fully exploring the performance advantages of the two materials, so that it has the characteristics of light weight, high efficiency, green and environmental protection, cold resistance and corrosion resistance, and reduces the disadvantages of traditional buckling restraint supports such as heavy weight, frequent wet operations and high subsequent maintenance costs.

[0022] Furthermore, blind rivets are used to connect and fix the inner core energy-absorbing tube, inner constraint tube and outer constraint tube in the middle of the support, which ensures that the inner and outer constraint tubes do not fall off when the support is vertical, and also ensures that the outer constraint tube does not twist when the support is working, which causes alignment problems between the slot and the stiffening rib.

[0023] Furthermore, a first gasket is set between the outer constraint tube and the inner core energy-absorbing tube, a second gasket is set between the inner core energy-absorbing tube and the inner constraint tube, and blind rivets are used for anchoring to prevent the inner core energy-absorbing tube from deviating from its position due to unilateral anchoring, thereby affecting the energy-absorbing capacity of the support.

[0024] Furthermore, cross-shaped notches are respectively opened at both ends of the outer constraint tube, and stiffening ribs are set at the ends of the inner core energy-absorbing tube to leave space for the stiffening ribs to follow the axial displacement of the inner core energy-absorbing tube during operation, rather than directly cutting and weakening the constraint stiffness; at the same time, it plays a role in extending the inner constraint tube longer than the outer constraint tube to ensure the full range constraint of the inner core energy-absorbing tube and improve the stability of the support; secondly, stiffening ribs are welded at the ends of the inner core energy-absorbing tube for external reinforcement to avoid the plastic deformation of the inner core energy-absorbing tube mainly occurring at the two ends, and failing to fully utilize the energy-absorbing characteristics of the aluminum alloy tube.

[0025] Furthermore, the length of the open slot is equal to the distance between the end of the inner restraint tube and the end of the inner core energy dissipation tube, effectively avoiding direct contact between the stiffening rib and the open slot and between the end plate and the inner restraint tube.

[0026] Furthermore, by opening a deformation notch group on the inner core energy dissipation tube and controlling the position of its plastic deformation by changing the cross-sectional form of the inner core energy dissipation tube, the purpose of fixed-point yielding is achieved, so as to give full play to the energy dissipation characteristics of the aluminum alloy tube.

[0027] Furthermore, by providing a connecting portion and connecting the connecting portion to the end plate with bolts, the installation of the support and subsequent maintenance and replacement are facilitated, thereby greatly improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the three-dimensional structure of the buckling restraint support device according to the embodiment;

[0029] Figure 2 is a front view of the buckling restrained support device according to an embodiment;

[0030] Figure 3 An exploded view of the buckling restrained support device according to an embodiment;

[0031] Figure 4 This is a front structural schematic diagram of the buckling restraint support device according to the embodiment;

[0032] Figure 5 for Figure 4 Cross-sectional view along AA;

[0033] Figure 6 for Figure 4 Cross-sectional view along BB.

[0034] Among them, 1 is an outer restraint tube, 2 is an inner core energy-absorbing tube, 3 is an inner restraint tube, 4 is a blind rivet, 5 is a first gasket, 6 is a stiffening rib, 7 is an end plate, 8 is a bolt, 9 is a connecting part, 10 is a second gasket; 11 is a cross-shaped notch, 12 is a first limiting hole; 21 is a rectangular notch, 22 is a second limiting hole; 31 is a third limiting hole; 91 is a square steel plate, and 92 is a steel connecting part. DETAILED DESCRIPTION

[0035] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail in the following specific 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.

[0036] The present invention provides a buckling restraint support device, comprising an outer restraint tube 1, an inner core energy dissipation tube 2, an inner restraint tube 3, a blind rivet 4, a first gasket 5, a stiffening rib 6, an end plate 7, a bolt 8, a connecting portion 9 and a second gasket 10.

[0037] The outer constraint tube 1 is concentrically sleeved on the outside of the inner core energy-absorbing tube 2, and the inner constraint tube 3 is concentrically sleeved inside the inner core energy-absorbing tube 2; wherein, the outer constraint tube 1 and the inner constraint tube 3 are both circular GFRP tubes, and the inner core energy-absorbing tube 2 is a circular aluminum alloy tube; the length dimension L1 of the outer constraint tube 1 is smaller than the length dimension L3 of the inner constraint tube 3, and the length dimension L3 of the inner constraint tube 3 is smaller than the length dimension L2 of the inner core energy-absorbing tube 2; wherein, the distance between the end of the inner constraint tube 3 and the end of the inner core energy-absorbing tube 2 is greater than the axial deformation length of the inner core energy-absorbing tube 2.

[0038] A plurality of first limiting holes 12 are evenly provided on the central circumference of the outer constraint tube 1, a plurality of second limiting holes 22 are evenly provided on the central circumference of the inner core energy-consuming tube 2, and a plurality of third limiting holes 31 are evenly provided on the central circumference of the inner constraint tube 3; wherein, the first limiting holes 12, the second limiting holes 22 and the third limiting holes 31 are arranged in a one-to-one correspondence; the blind rivet 4 is sequentially passed through the first limiting hole 12, the second limiting hole 22 and the third limiting hole 31 to fix the outer constraint tube 1, the inner core energy-consuming tube 2 and the The inner constraint tube 3 is fixedly connected together; the first gasket 5 is arranged between the outer constraint tube 1 and the inner core energy-consuming tube 2, and is located between the first limiting hole 12 and the second limiting hole 22; the second gasket 10 is arranged between the inner core energy-consuming tube 2 and the inner constraint tube 3, and is located in the corresponding arrangement of the second limiting hole 22 and the third limiting hole 31; wherein, the first gasket 5 and the second gasket 10 are both annular flexible cushion layer structures, and the blind rivet 4 is arranged through the first gasket 5 and the second gasket 10.

[0039] A cross-shaped slot 11 is provided at both ends of the outer constraint tube 1; wherein, the cross-shaped slot 11 includes four open slots, and the four open slots are distributed in a cross-shaped structure on the end circumference of the outer constraint tube 1, and the intersection of the four open slots is located on the longitudinal axis of the outer constraint tube 1; preferably, the length dimension of the open slot is equal to the distance dimension between the end of the inner constraint tube 3 and the end of the inner core energy-absorbing tube 2; four stiffening ribs 6 are evenly arranged on the outer circumferential surface of the end of the inner core energy-absorbing tube 2, and the four stiffening ribs 6 are arranged in a one-to-one correspondence with the four open slots; wherein, one end of the stiffening rib 6 is vertically fixed to the outer circumferential surface of the end of the inner core energy-absorbing tube 2, and the other end of the stiffening rib 6 extends away from the center direction of the inner core energy-absorbing tube 2; preferably, the stiffening rib 6 is a rectangular aluminum sheet, the end of the stiffening rib 6 is flush with the end of the inner core energy-absorbing tube 2, and the length dimension of the stiffening rib 6 is smaller than the length dimension of the open slot.

[0040] The inner core energy-consuming tube 2 is provided with a plurality of deformation slot groups, and the plurality of deformation slot groups are evenly arranged along the longitudinal axis of the inner core energy-consuming tube 2; wherein, each of the deformation slot groups includes four rectangular slots 21, and the four rectangular slots 21 are distributed in a cross-shaped structure on the circumference of the inner core energy-consuming tube 2, and the intersection of the four rectangular slots 21 is located on the longitudinal axis of the inner core energy-consuming tube 2; preferably, there are four deformation slot groups provided on the inner core energy-consuming tube 2; the four deformation slot groups are evenly arranged along the longitudinal axis of the inner core energy-consuming tube 2, and are symmetrically arranged about the midpoint of the inner core energy-consuming tube 2.

[0041] The end plates 7 are vertically fixed to the two ends of the inner core energy-consuming tube 2, and the connecting portion 9 is arranged on the outside of the end plates 7; wherein, one end of the connecting portion 9 is fixedly connected to the end plates 7, and the other end of the connecting portion 9 is used to be connected to the building structure; the connecting portion 9 and the end plates 7 are fixedly connected by bolts 8, and the end plates 7 and the ends of the inner core energy-consuming tube 2 are fixed by welding; wherein, the bolts 8 are steel bolts.

[0042] Assembly process:

[0043] When assembling the buckling restraint support device described in the present invention, the outer restraint tube 1 and the inner restraint tube 3 are respectively inserted into the outer side and the inner side of the inner core energy-absorbing tube 2; a first gasket 5 is placed between the outer restraint tube 1 and the inner core energy-absorbing tube 2, and a second gasket 10 is placed between the inner core energy-absorbing tube 2 and the inner restraint tube 3, and a blind rivet 4 is used to pass through the outer restraint tube 1, the first gasket 5, the inner core energy-absorbing tube 2, the second gasket 10 and the inner restraint tube 3 for connection; then, stiffening ribs 6 are welded in a cross shape on the outer sides of both ends of the inner core energy-absorbing tube 2; finally, the inner core energy-absorbing tube 2 is fixedly connected to the end plates 7 at both ends, and the end plates 7 are connected to the connecting part 9 by bolts 8. At this point, the buckling restraint support device is assembled.

[0044] Working principle:

[0045] The buckling restraint support device shown in the present invention can achieve the effect of "yielding without buckling" when subjected to tension or compression; among them, when subjected to axial tension, only the inner core energy-absorbing tube 2 of the buckling restraint support is tensilely deformed, which is the same as the ordinary support; when subjected to axial pressure, its force situation becomes very complicated. As the axial pressure increases, the inner core energy-absorbing tube 2 will come into contact with the outer constraint tube 1 and the inner constraint tube 3, and the contact mode gradually develops from point contact to surface contact. The inner core energy-absorbing tube 2 gradually changes from a first-order buckling mode to a high-order buckling mode, and the compressive bearing capacity of the inner core energy-absorbing tube 2 continues to increase until it exceeds the yield axial force of the support.

[0046] Example

[0047] As attached Figure 1-6 As shown, this embodiment provides a buckling restraint support device, including an outer restraint tube 1, an inner core energy-absorbing tube 2, an inner restraint tube 3, four blind rivets 4, four first gaskets 5, eight stiffening ribs 6, two end plates 7, two connecting parts 9 and four second gaskets 10.

[0048] The outer constraint tube 1 is a circular GFRP tube, and a cross-shaped slot 11 is respectively provided at both ends of the outer constraint tube 1; wherein, the cross-shaped slot 11 includes four open slots, and the four open slots are distributed in a cross shape on the end circumference of the outer constraint tube 1, and the intersection of the four open slots is located on the longitudinal axis of the outer constraint tube 1; preferably, the length dimension of the open slot is 1.2 to 1.5 times the axial deformation design value of the flexure constraint support; four first limiting holes 12 are evenly arranged on the middle circumference of the outer constraint tube 1, and the adjacent first limiting holes 12 are spaced 90° apart.

[0049] The inner core energy-absorbing tube 2 is a circular aluminum alloy tube, and four deformation notch groups are provided on the inner core energy-absorbing tube 2. The four deformation notch groups are evenly distributed along the longitudinal axis of the inner core energy-absorbing tube 2 and are located in the middle part of the inner core energy-absorbing tube 2; each of the deformation notch groups includes four rectangular notches 21, and the four rectangular notches 21 are distributed in a cross-shaped structure on the circumference of the inner core energy-absorbing tube 2, and the intersection of the four rectangular notches 21 is located on the longitudinal axis of the inner core energy-absorbing tube 2; specifically, 16 rectangular notches 21 are provided in the middle part of the inner core energy-absorbing tube 2 along the longitudinal direction, and the 16 rectangular notches are divided into four groups, namely four deformation notch groups; four second limiting holes 22 are evenly provided on the middle circumference of the inner core energy-absorbing tube 2, and the adjacent second limiting holes 22 are spaced 90° apart.

[0050] The inner restraining tube 3 is a circular GFRP tube. Four third limiting holes 31 are evenly arranged on the central circumference of the inner restraining tube 3 , and the intervals between adjacent third limiting holes 31 are 90°.

[0051] The blind rivet 4 is an aluminum alloy blind rivet; the first gasket 5 and the second gasket 10 are both annular flexible gasket structures, and the centers of the first gasket 5 and the second gasket 10 are both provided with limited through holes; the stiffening rib 6 is a rectangular saw blade; the end plate 7 is a square aluminum plate, and four first bolt holes are symmetrically provided at the four corners of the end plate 7; the bolt 8 is a steel bolt; the connecting part 9 includes a square steel plate 91 and a steel connecting part 92, and the square steel plate 91 is vertically fixed to the steel connecting part 92; four second bolt holes are symmetrically provided at the four corners of the square steel plate 91, and the first bolt holes and the second bolt holes are provided in a one-to-one correspondence.

[0052] In this embodiment, the outer constraint tube 1 and the inner constraint tube 3 are respectively sleeved on the outer side and the inner side of the inner core energy-consuming tube 2; the first gasket 5 is arranged between the outer constraint tube 1 and the inner core energy-consuming tube 2, and is arranged corresponding to the first limiting hole 12 and the second limiting hole 22; the second gasket 10 is arranged between the inner core energy-consuming tube 2 and the inner constraint tube 3, and is arranged corresponding to the second limiting hole 22 and the third limiting hole 31; the blind rivet 4 is used to sequentially penetrate the first limiting hole 12, the limiting through hole of the first gasket 5, the second limiting hole 22, the limiting through hole of the second gasket 10 and the third limiting hole 31 to fix the outer constraint tube 1, the first gasket 5, the inner core energy-consuming tube 2, the second gasket 10 and the inner constraint tube 3 together; wherein, the sizes of the first limiting hole 12, the limiting through hole of the first gasket 5, the second limiting hole 22, the limiting through hole of the second gasket 10 and the third limiting hole 31 are all equal.

[0053] Four stiffening ribs 6 are evenly arranged on the outer circumferential surface of the end of the inner core energy-absorbing tube 2, and the four stiffening ribs 6 are arranged in a one-to-one correspondence with the four open grooves; wherein, one end of the stiffening rib 6 is vertically fixed to the outer circumferential surface of the end of the inner core energy-absorbing tube 2, and the other end of the stiffening rib 6 extends in a direction away from the center of the inner core energy-absorbing tube 2; preferably, the end of the stiffening rib 6 is flush with the end of the inner core energy-absorbing tube 2; the end plate 7 is welded and fixed to the end of the inner core energy-absorbing tube 2, and the end plate 7 and the square steel plate 91 in the connecting portion 9 are fixedly connected together by the bolt 8; specifically, the bolt 8 passes through the first bolt hole and the second bolt in sequence to fix the end plate 7 and the square steel plate 91 together;

[0054] In this embodiment, the inner core energy-absorbing tube 2 is fixed to the end plate 7 by welding, and the end plate 7 is fixed to the connecting portion 9 by bolts 8, so as to facilitate the installation of the support and subsequent maintenance and replacement, thereby greatly improving the construction efficiency.

[0055] In this embodiment, the inner diameter of the outer constraint tube 1 is larger than the outer diameter of the inner core energy-absorbing tube 2, and the inner diameter of the inner core energy-absorbing tube 2 is larger than the outer diameter of the inner constraint tube 3; on the one hand, it is convenient for the assembly between the tubes, and on the other hand, space is reserved for the deformation of the inner core energy-absorbing tube 2; when assembling the buckling constraint support, the first gasket 5 should be set between the outer constraint tube 1 and the inner core energy-absorbing tube 2, and the second gasket 10 should be set between the inner core energy-absorbing tube 2 and the inner constraint tube 3; then, 4 blind rivets 4 are used for anchoring connection, which plays the role of torsional limitation and axial limitation to prevent the position deviation of the tube caused by unilateral anchoring, affecting the energy absorption capacity of the support.

[0056] In this embodiment, the plastic deformation of the inner core energy dissipation tube 2 is utilized to dissipate energy, and the rectangular notch 21 is provided to control the plastic deformation area to achieve the purpose of fixed-point yielding; when the support is subjected to seismic load, the inner core energy dissipation tube 2 first undergoes plastic buckling deformation at the position of the rectangular notch 21, and the outer constraint tube 1 and the inner constraint tube 3 improve the seismic performance of the support by limiting the lateral deformation of the inner core energy dissipation tube 2.

[0057] In this embodiment, the yield lengths of the outer constraint tube 1 and the inner constraint tube 3 are both greater than the yield length of the inner core energy-absorbing tube 2 to ensure that the inner core energy-absorbing tube 2 is fully constrained; at the same time, the length of the opening groove 11 of the outer constraint tube 1 is greater than the axial deformation length of the inner core energy-absorbing tube 2, the distance between the end of the inner constraint tube 3 and the end of the inner core energy-absorbing tube 2 is greater than the axial deformation length of the inner core energy-absorbing tube 2, and the length dimension of the stiffening rib 6 is smaller than the length dimension of the opening groove to avoid direct contact between the stiffening rib 6 and the opening groove and between the end plate 7 and the inner constraint tube 3.

[0058] Dimensional characteristics:

[0059] In this embodiment, the outer diameter of the outer constraint tube 1 is D1, the inner diameter of the outer constraint tube 1 is d1, the length of the outer constraint tube 1 is L1, and the length of the opening slot is l 11 , the width of the opening slot is w 11 The outer diameter of the core energy dissipation tube 2 is D2, the inner diameter of the core energy dissipation tube 2 is d2, and the length of the core energy dissipation tube is L2; ​​the outer diameter of the inner constraint tube 3 is D3, the inner diameter of the inner constraint tube 3 is d3, and the length of the inner constraint tube 3 is L3; the diameter of the blind rivet 4 is d4, and the length of the blind rivet 4 is l4; the length of the stiffening rib 6 is l6, the thickness of the stiffening rib 6 is t6, and the width of the stiffening rib 6 is w6; the side length of the end plate 7 is l7, and the thickness of the end plate 7 is t7; then: w 11 =t6+(2~4)mm; d1=D2+(2~3)mm; d2=D3+(2~3)mm; D1-d3<l4; D1-d3<l4; L1<L3<L2.

[0060] The present invention also provides a second implementation, which is as follows:

[0061] The second implementation method is basically the same as the structure and principle of the above-mentioned embodiment 1, except that: the adjacent rectangular slots 21 on both sides of the inner core energy-consuming tube 2 are connected to form 8 slots, and the rest are consistent with embodiment 1; in the second implementation method, the cross-section of the inner core energy-consuming tube 2 is adjusted by adjusting the number of slots, thereby adjusting the yield length of the inner core energy-consuming tube 2.

[0062] The present invention also provides a third implementation, which is as follows:

[0063] The third implementation method is basically the same as the structure and principle of the above-mentioned embodiment 1, except that the length of the open groove is equal to the distance between the end of the inner constraint tube 3 and the end of the inner core energy-consuming tube 2.

[0064] In the present invention, the inner constraint tube and the outer constraint tube are sequentially inserted into the inner and outer sides of the inner core energy-absorbing tube, and an open groove is provided at the end of the outer constraint tube to reserve space for the stiffening rib to follow the axial displacement of the inner core energy-absorbing tube during operation, rather than directly cutting the outer constraint tube to weaken the constraint stiffness; at the same time, the inner constraint tube is extended longer than the outer constraint tube to ensure full-range constraint of the inner core energy-absorbing tube as much as possible, thereby improving the stability of the support; the inner core energy-absorbing tube and the constraint tube are respectively made of aluminum alloy tube and glass fiber composite material tube, which can fully realize their characteristics of light weight, high efficiency, green environmental protection, cold resistance and corrosion resistance, and reduce the disadvantages of traditional flexural restraint support such as heavy weight, frequent wet operations and high subsequent maintenance costs.

[0065] In the present invention, rectangular notches are arranged in sections on the inner core energy-absorbing tube, and stiffening ribs are welded at the ends for external reinforcement. By changing the cross-sectional form of the inner core energy-absorbing tube, the position of its plastic deformation is controlled to achieve the purpose of fixed-point yielding, thereby avoiding the plastic deformation of the inner core energy-absorbing tube mainly occurring at the two ends, and failing to give full play to the energy-absorbing characteristics of the aluminum alloy tube; the inner core energy-absorbing tube, the inner constraint tube and the outer constraint tube are connected and fixed in the middle of the support by using blind rivets, which ensures that the inner and outer constraint tubes do not fall off when the support is vertical, and also ensures that the outer constraint tube does not twist when the support is working, which causes the alignment problem of the notch and the stiffening rib.

[0066] The buckling restraint support device described in the present invention adopts the method of respectively sleeveing ​​the inner restraint tube and the outer restraint tube on the inner side and the outer side of the inner core energy-absorbing tube, connecting and limiting them by means of blind rivets; welding stiffening ribs on the outer sides of both ends of the inner core energy-absorbing tube to strengthen the cross-section, and setting connecting parts on the left and right sides of the inner core energy-absorbing tube; wherein, the outer restraint tube and the inner restraint tube are both circular GFRP tubes, and the inner core energy-absorbing tube is made of circular aluminum alloy tube. Both the aluminum alloy tube and the GFRP tube have the characteristics of light weight and high strength, and the construction process does not require traditional buckling restraint support wet operation; the inner core energy-absorbing tube utilizes the outer restraint tube and the inner restraint tube for full-range restraint, thereby improving the support stability; the inner core energy-absorbing tube adopts internal grooving and end reinforcement cross-section to achieve the effect of fixed-point yielding, effectively avoid premature damage of the end, and has good energy-absorbing performance; the cross-section of the buckling restraint support device is circular, and the outer restraint tube is made of GFRP, which is smooth and bright, beautiful in appearance, and suitable for building structures with high requirements on appearance.

[0067] The above embodiment is only one of the implementation methods that can realize the technical solution of the present invention. The scope of protection claimed by the present invention is not limited only to this embodiment, but also includes changes, replacements and other implementation methods that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention.

Claims

1. A buckling restraint support device, characterized in that: It comprises an outer restraining tube (1), an inner core energy-dissipating tube (2), an inner restraining tube (3) and an end plate (7), wherein the end plate (7) is vertically fixed to both ends of the inner core energy-dissipating tube (2); The outer constraint tube (1) is concentrically sleeved on the outside of the inner core energy dissipation tube (2), and the inner constraint tube (3) is concentrically sleeved inside the inner core energy dissipation tube (2); wherein the outer constraint tube (1) and the inner constraint tube (3) are both circular GFRP tubes, and the inner core energy dissipation tube (2) is a circular aluminum alloy tube; Both ends of the outer constraint tube (1) are respectively provided with a cross-shaped notch (11); wherein the cross-shaped notch (11) includes four opening slots, the four opening slots are distributed on the end circumference of the outer constraint tube (1) in a cross-shaped structure, and the intersection of the four opening slots is located on the longitudinal axis of the outer constraint tube (1); Four stiffening ribs (6) are evenly arranged on the outer circumferential surface of the end of the inner core energy-absorbing tube (2), and the four stiffening ribs (6) are arranged in a one-to-one correspondence with the four opening grooves; wherein one end of the stiffening rib (6) is vertically fixed to the outer circumferential surface of the end of the inner core energy-absorbing tube (2), and the other end of the stiffening rib (6) extends in a direction away from the center of the inner core energy-absorbing tube (2); The length of the open slot is equal to the distance between the end of the inner constraint tube (3) and the end of the inner core energy dissipation tube (2); The stiffening rib (6) is a rectangular aluminum sheet, the end of the stiffening rib (6) is flush with the end of the inner core energy-absorbing tube (2), and the length of the stiffening rib (6) is smaller than the length of the opening slot; The length dimension L1 of the outer constraint tube (1) is smaller than the length dimension L3 of the inner constraint tube (3), and the length dimension L3 of the inner constraint tube (3) is smaller than the length dimension L2 of the inner core energy-consuming tube (2); wherein, the distance between the end of the inner constraint tube (3) and the end of the inner core energy-consuming tube (2) is greater than the axial deformation length of the inner core energy-consuming tube (2).

2. A buckling-restrained brace according to claim 1, characterized in that: It also includes a blind rivet (4); a plurality of first limiting holes (12) are evenly provided on the central circumference of the outer constraint tube (1), a plurality of second limiting holes (22) are evenly provided on the central circumference of the inner core energy-consuming tube (2), and a plurality of third limiting holes (31) are evenly provided on the central circumference of the inner constraint tube (3); wherein the first limiting hole (12), the second limiting hole (22) and the third limiting hole (31) are arranged in a one-to-one correspondence; the blind rivet (4) is sequentially passed through the first limiting hole (12), the second limiting hole (22) and the third limiting hole (31) to fix the outer constraint tube (1), the inner core energy-consuming tube (2) and the inner constraint tube (3) together.

3. A buckling-restrained support device according to claim 2, characterized in that: It also includes a first gasket (5) and a second gasket (10); the first gasket (5) is arranged between the outer constraint tube (1) and the inner core energy-consuming tube (2), and is located between the first limiting hole (12) and the second limiting hole (22); the second gasket (10) is arranged between the inner core energy-consuming tube (2) and the inner constraint tube (3), and is located corresponding to the second limiting hole (22) and the third limiting hole (31); wherein the first gasket (5) and the second gasket (10) are both annular flexible gasket structures, and the blind rivet (4) is arranged to pass through the first gasket (5) and the second gasket (10).

4. A buckling-restrained brace according to claim 1, characterized in that: The inner core energy dissipation tube (2) is provided with a plurality of deformation notch groups, and the plurality of deformation notch groups are evenly distributed along the longitudinal axis of the inner core energy dissipation tube (2); Each of the deformed notch groups comprises four rectangular notches (21), the four rectangular notches (21) being distributed on the circumference of the inner core energy dissipation tube (2) in a cross-shaped structure, and the intersection of the four rectangular notches (21) is located on the longitudinal axis of the inner core energy dissipation tube (2).

5. A buckling-restrained brace according to claim 4, characterized in that: There are four deformation notch groups on the inner core energy dissipation tube (2); the four deformation notch groups are evenly distributed along the longitudinal axis of the inner core energy dissipation tube (2) and are symmetrically arranged about the midpoint of the inner core energy dissipation tube (2).

6. The buckling-restrained brace according to claim 1, wherein: It also includes a connecting portion (9), which is arranged on the outside of the end plate (7); wherein one end of the connecting portion (9) is fixedly connected to the end plate (7), and the other end of the connecting portion (9) is used to be connected to a building structure.

7. A buckling-restrained brace according to claim 6, characterized in that: The connecting portion (9) and the end plate (7) are fixedly connected by bolts (8), and the end plate (7) and the end of the inner core energy-consuming tube (2) are fixed by welding; wherein the bolts (8) are steel bolts.

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