Coated and constrained buckling-restrained brace structure

Abstract

The utility model provides an anti-buckling supporting structure with wrapping constraint, which belongs to the anti-seismic technology of building structures and comprises a middle elastic section and energy consumption deformation sections arranged at two opposite ends of the middle elastic section, and each energy consumption deformation section comprises an energy consumption core body and a wrapping structure wrapping the periphery of the energy consumption core body. The energy consumption core body and the wrapping structure extend to the middle elastic section and are connected with the middle elastic section. The wrapping structure is arranged on the periphery of the energy dissipation core body, buckling constraint of the energy dissipation deformation section is enhanced, it is ensured that local instability of the energy dissipation deformation section does not occur, and the whole wrapping constraint buckling-restrained supporting structure keeps elastic or yielding energy dissipation under the action of frequent earthquakes and is in an elastic or yielding energy dissipation state under the action of medium earthquakes; under the action of a large earthquake, plastic energy dissipation is achieved, and the good deformation energy dissipation capacity of steel is fully exerted.

Description

Technical Field

[0001] The utility model belongs to the earthquake-resistant technology of building structures, and relates to the buckling restraint technology of building structures in earthquakes, in particular to a buckling-resistance bracing structure with covering restraint. Background Art

[0002] According to the requirements of the Code for Seismic Design of Buildings GB50011-2010 (2016 edition), building structures need to be seismically fortified to reduce earthquake damage to the building structure, avoid casualties, and reduce economic losses. Therefore, a seismic absorption structure must be installed in the building structure.

[0003] The support frame structure has the characteristics of large seismic stiffness and excellent seismic performance, and is widely used in actual building structures. As a key component of the support frame structure, the support plays a key role in the performance of the seismic structure. Therefore, the support is also a hot spot for technical personnel to study at present. Referring to the patent application document with application number CN202320849047.X, it discloses a buckling-resistance brace structure that resists collapse, including support rods, the support rods are connected to each other in an X-shaped structure; a connector, the connector is used to connect the support rods, and the support rods are connected by the connector; a compression damping mechanism is arranged in the support rod, which is used to consume the energy borne by the support rod during an earthquake; and a connection reinforcement mechanism is arranged on the connector to reinforce the connector to increase the seismic resistance of the connector. This patent document changes the traditional mono-oblique buckling-resistance brace to an X-shaped arrangement. Compared with the traditional herringbone or V-shaped buckling-resistance brace, the X-shaped buckling-resistance brace has a smaller horizontal angle and has the advantages of high stiffness and high energy consumption efficiency. Although the technology described in the patent document can improve the stiffness of the support to a certain extent, the existing support will buckle under compression under horizontal loads, resulting in local instability, causing the support's compressive bearing capacity to be much lower than its tensile bearing capacity. Once the support buckles under compression, its stiffness and bearing capacity will drop sharply, which may cause the building structure to collapse. Utility Model Content

[0004] As described in the above background technology, the existing supports will buckle under horizontal loads, resulting in local instability, which causes the compressive bearing capacity of the supports to be much lower than its tensile bearing capacity. To address this technical problem, the utility model proposes a buckling-resistance support structure with a covering constraint.

[0005] The utility model adopts the idea of ​​segmented control to optimize the traditional support, and divides the entire wrapped and constrained anti-buckling support structure into an energy-absorbing deformation section and an intermediate elastic section. The intermediate elastic section ensures that the support has sufficient rigidity and can always maintain elasticity throughout the entire life cycle. A wrapping structure is set on the periphery of the energy-absorbing core of the energy-absorbing deformation section to enhance the buckling constraint of the energy-absorbing deformation section, ensure that the energy-absorbing deformation section will not be locally unstable, and make the entire wrapped and constrained anti-buckling support structure maintain elasticity or yield energy dissipation under multiple earthquakes, be in an elastic or yield energy dissipation state under medium earthquakes, and plastically dissipate energy under large earthquakes, giving full play to the good deformation energy dissipation capacity of steel. The utility model fully combines the advantages of high rigidity and easy processing of traditional steel supports, and can effectively enhance the deformation capacity and hysteresis performance of the support by combining the energy-absorbing deformation section and the intermediate elastic section, so as to improve the deformation energy dissipation capacity of the anti-buckling support structure.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model discloses a buckling-resistance support structure with sheathing constraint, comprising a middle elastic section and energy-absorbing deformation sections arranged at two opposite ends of the middle elastic section, wherein the energy-absorbing deformation section comprises an energy-absorbing core and a sheathing structure sheathed around the outer periphery of the energy-absorbing core, wherein the energy-absorbing core and the sheathing structure both extend to the middle elastic section and are connected to the middle elastic section.

[0008] It is further defined that, in the energy dissipation deformation section, the energy dissipation core is in contact with the covering structure; in the transition connection section, the energy dissipation core is fixedly connected with the covering structure, so that the energy dissipation deformation section can be freely deformed along the axial direction under the action of tension and compression.

[0009] It is further defined that the cross-sectional dimension of the middle elastic section is greater than the cross-sectional dimension of the energy-absorbing deformation section.

[0010] It is further defined that the encapsulated and constrained anti-buckling support structure also includes a transition connection section arranged between the energy-absorbing deformation section and the middle elastic section, and the transition connection section is formed in the process of extending the energy-absorbing core and the encapsulating structure to the middle elastic section.

[0011] It is further defined that in the transition connection section, the energy dissipation core and the cladding structure are both gradual transition structures, and the cross-sectional size of the energy dissipation core changes from being smaller than the cross-sectional size of the cladding structure, to being equal to the cross-sectional size of the cladding structure, and then to being larger than the cross-sectional size of the cladding structure;

[0012] The cross-sectional dimension of the coating structure changes from being larger than the cross-sectional dimension of the energy-absorbing core, to being equal to the cross-sectional dimension of the energy-absorbing core, and then to being smaller than the cross-sectional dimension of the energy-absorbing core; so that the energy-absorbing core and the coating structure are both variable cross-sectional structures.

[0013] It is further defined that the length of the transition connection section is 1 / 3 to 1 / 2 of the length of the energy-dissipating deformation section.

[0014] It is further defined that the contact refers to setting a deformation gap between the energy-dissipating core and the covering structure, or setting an elastic buffer layer between the energy-dissipating core and the covering structure; so as to reduce the friction resistance between the energy-dissipating core and the covering structure.

[0015] It is further defined that the encapsulated constrained anti-buckling support structure also includes an end connecting section connected to the energy dissipation deformation section, the end connecting section is formed by extending the energy dissipation core outward, and the end connecting section transition connecting section is arranged at two opposite ends of the energy dissipation deformation section.

[0016] It is further defined that, at the end connecting section, the energy-absorbing core comprises a connecting section, a deformation section and a first core transition section which are sequentially connected along the yielding direction, and the first core transition section extends to the energy-absorbing deformation section and partially overlaps with the energy-absorbing deformation section.

[0017] It is further defined that the energy-absorbing core is an I-beam, a cross-shaped steel or a straight-shaped steel; when the energy-absorbing core is an I-shaped steel, the covering structure is a covering channel steel arranged in the groove of the I-shaped steel and a first covering plate respectively arranged above the upper flange plate of the I-shaped steel and below the lower flange plate of the I-shaped steel; when the energy-absorbing core is a cross-shaped steel, the covering structure is an L-shaped covering channel steel arranged close to the web of the cross-shaped steel; when the energy-absorbing core is a straight-shaped steel, the covering structure is a second covering plate respectively arranged above the straight-shaped steel and below the straight-shaped steel.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model comprises a buckling-resistance bracing structure with encapsulation constraint, which comprises a middle elastic section and energy-dissipating deformation sections arranged at opposite ends of the middle elastic section, wherein the energy-dissipating deformation section comprises an energy-dissipating core and an encapsulating structure encapsulating the periphery of the energy-dissipating core. The utility model arranges an encapsulating structure on the periphery of the energy-dissipating core to enhance the buckling constraint of the energy-dissipating deformation section, ensure that the energy-dissipating deformation section will not be locally unstable, and make the entire buckling-resistance bracing structure with encapsulation constraint maintain elasticity or yield energy dissipation under multiple earthquakes, be in an elastic or yield energy dissipation state under medium earthquakes, and plastically dissipate energy under large earthquakes, giving full play to the good deformation energy dissipation capacity of steel.

[0020] 2. The utility model adopts the idea of ​​segmented control to optimize the traditional support, and divides the entire wrapped and constrained anti-buckling support structure into an energy-dissipating deformation section and an intermediate elastic section. The intermediate elastic section ensures that the support has sufficient rigidity and can always maintain elasticity throughout the entire life cycle. The utility model fully combines the advantages of traditional steel supports, which are high in rigidity and easy to process. The combination of the energy-dissipating deformation section and the intermediate elastic section can effectively enhance the deformation capacity and hysteresis performance of the support, so as to improve the rigidity and deformation energy dissipation capacity of the anti-buckling support structure.

[0021] 3. In the energy dissipation deformation section, the energy dissipation core and the covering structure are in contact, and in the middle elastic section, the energy dissipation core and the covering structure are fixedly connected to reduce the friction resistance between the energy dissipation core and the covering structure, so that the energy dissipation deformation section can be freely deformed along the axial direction under the action of tension and compression, so as to achieve the purpose of restraining the energy dissipation core in the energy dissipation deformation section from overall buckling.

[0022] 4. The cross-sectional dimension of the middle elastic section of the utility model is larger than that of the energy-absorbing deformation section. By limiting the cross-sectional dimension, it is ensured that the energy-absorbing deformation section can first dissipate plastic energy under the action of moderate and large earthquakes. By optimizing the structural measures of the energy-absorbing deformation sections at both ends, it is ensured that the buckling of the energy-absorbing deformation section does not occur before yielding. The energy-absorbing deformation sections at both ends are fully utilized to dissipate seismic energy by axial deformation, and have good deformation capacity and energy dissipation capacity.

[0023] 5. In the transition connection section, the utility model sets the energy-dissipating core and the covering structure as a gradual transition structure to avoid a sudden change in stiffness in the energy-dissipating deformation section.

[0024] 6. The energy-absorbing core and cladding structure used in the entire structure of the utility model and the box-shaped steel used in the middle elastic section can be prefabricated in the factory in advance and only need to be installed on site, which effectively reduces the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view of the three-section wrapped buckling restrained steel support (I-shaped steel) of the utility model;

[0026] Figure 2 for Figure 1 Cross-section along the AA plane;

[0027] Figure 3 for Figure 1 Cross-section along the BB plane;

[0028] Figure 4 for Figure 1 Cross-sectional view along CC plane;

[0029] Figure 5 for Figure 1Cross-section along the DD plane;

[0030] Figure 6 for Figure 1 The cross-section along the EE plane;

[0031] Figure 7 It is a top view of the three-section wrapped buckling restrained steel support (I-shaped steel) of the utility model;

[0032] Figure 8 It is a side view of the three-section wrapped buckling restrained steel support (cross-shaped steel) of the utility model;

[0033] Fig. 9 for Figure 8 Cross-section along the AA plane;

[0034] Fig.10 for Figure 8 Cross-section along the BB plane;

[0035] Fig.11 for Figure 8 Cross-sectional view along CC plane;

[0036] Fig.12 for Figure 8 Cross-section along the DD plane;

[0037] Fig.13 for Figure 8 The cross-section along the EE plane;

[0038] Fig.14 It is a top view of the three-section wrapped buckling restrained steel support of the utility model (cross-shaped steel);

[0039] Fig.15 It is a side view of the three-section wrapped buckling restrained steel support of the utility model (straight steel);

[0040] Fig.16 for Fig.15 Cross-section along the AA plane;

[0041] Fig.17 for Fig.15 Cross-section along the BB plane;

[0042] Fig.18 for Fig.15 Cross-sectional view along CC plane;

[0043] Fig.19 for Fig.15 Cross-section along the DD plane;

[0044] Fig. 20 for Fig.15 The cross-section along the EE plane;

[0045] Fig.21 It is a top view of the three-section wrapped anti-buckling restrained steel support of the utility model (straight steel);

[0046] Among them, 1-end connecting section, 101-connecting section, 102-deformation section, 103-first core transition section, 2-energy-absorbing deformation section, 201-energy-absorbing core, 202-cladding structure, 2021-first cladding plate, 2022-cladding channel steel, 203-connecting piece, 204-pretensioning piece, 205-L-shaped cladding channel steel, 206-second cladding plate, 3-transition connecting section, 301-cladding transition section, 302-second core transition section, 303-cladding connecting section, 304-core connecting section, 4-middle elastic section. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the implementation methods described below.

[0048] Example 1

[0049] See also Figure 1 and Figure 7 The buckling-resistance bracing structure with sheathing constraint in this embodiment comprises a middle elastic section 4 and energy dissipation deformation sections 2 arranged at opposite ends of the middle elastic section 4. The energy dissipation deformation section 2 comprises an energy dissipation core 201 and a sheathing structure 202 sheathed around the outer periphery of the energy dissipation core 201. Both the energy dissipation core 201 and the sheathing structure 202 extend to the middle elastic section 4 and are connected to the middle elastic section 4. For details, see Figure 2 In this embodiment, the energy dissipation core 201 is an I-shaped steel. Figure 3 and Figure 4 , the cladding structure 202 is a first cladding plate 2021 and a cladding channel steel 2022, wherein the cladding channel steel 2022 is arranged in the grooves on both sides formed by the upper flange plate, the web plate and the lower flange plate of the I-shaped steel, and the cladding channel steel 2022 matches the structure of the groove, and the first cladding plate 2021 is arranged above the upper flange plate of the I-shaped steel and below the lower flange plate of the I-shaped steel, and the outer periphery of the I-shaped steel is clad by the first cladding plate 2021 and the cladding channel steel 2022; see Figure 6, the middle elastic section 4 is a box-shaped steel, the first cladding plate 2021, the I-shaped steel and the cladding channel steel 2022 all extend into the cavity structure of the box-shaped steel and are connected to the box-shaped steel. In the energy dissipation deformation section 2, the cross-sectional dimension of the I-shaped steel is smaller than the cross-sectional dimension of the cladding structure 202 formed by the first cladding plate 2021 and the cladding channel steel 2022; in the middle elastic section 4, the cross-sectional dimension of the I-shaped steel is larger than the cross-sectional dimension of the cladding structure 202 formed by the first cladding plate 2021 and the cladding channel steel 2022, so that the segmented cladding anti-buckling restraint support forms a spatial restraint fulcrum in the middle elastic section 4.

[0050] In this embodiment, in the energy dissipation deformation section 2, the energy dissipation core 201 and the cladding structure 202 are in non-fixed contact; in the transition connection section 3, the energy dissipation core 201 and the cladding structure 202 are fixedly connected (fixedly connected by fillet welding); so that the energy dissipation deformation section 2 can be freely deformed in the axial direction under the action of tension and compression. Non-fixed contact refers to setting a deformation gap between the I-beam and the cladding channel steel 2022, and the size of the deformation gap can be any value of 3㎜, 4㎜ or 5㎜; or setting an elastic buffer layer between the I-beam and the cladding channel steel 2022; the elastic buffer layer is any one of a polytetrafluoroethylene plate, a plastic plate or a rubber plate. To reduce the friction resistance between the I-beam and the cladding channel steel 2022. Fixed connection refers to the welding of the I-beam and the box-shaped steel, and at the same time, the cladding channel steel 2022 and the first cladding plate 2021 are both welded to the I-beam.

[0051] In this embodiment, the cross-sectional dimension of the middle elastic section 4 is larger than the cross-sectional dimension of the energy dissipation deformation section 2. Specifically, the cross-sectional dimension of the box-shaped steel is larger than the cross-sectional dimension of the energy dissipation deformation section 2 formed by the first cladding plate 2021, the I-shaped steel and the cladding channel steel 2022.

[0052] The buckling-resistant support structure with sheathing constraint in this embodiment also includes a transition section 3 arranged between the energy-absorbing deformation section 2 and the middle elastic section 4. The transition section 3 is formed in the process of the energy-absorbing core 201 and the sheathing structure 202 extending toward the middle elastic section 4. In the transition section 3, both the energy-absorbing core 201 and the sheathing structure 202 are gradually transitioned structures, and the cross-sectional dimension of the energy-absorbing core 201 changes from being smaller than the cross-sectional dimension of the sheathing structure 202, to being equal to the cross-sectional dimension of the sheathing structure 202, and then to being larger than the cross-sectional dimension of the sheathing structure 202; the cross-sectional dimension of the sheathing structure 202 changes from being larger than the cross-sectional dimension of the energy-absorbing core 201, to being equal to the cross-sectional dimension of the energy-absorbing core 201, and then to being smaller than the cross-sectional dimension of the energy-absorbing core 201; so that both the energy-absorbing core 201 and the sheathing structure 202 are variable cross-sectional structures. For details, see Figure 5In the process of the energy dissipation core 201 and the covering structure 202 extending toward the middle elastic section 4, the cross-sectional dimension of the I-shaped steel changes from being smaller than the cross-sectional dimension of the covering structure 202 formed by the first covering plate 2021 and the covering channel steel 2022, to being equal to the cross-sectional dimension of the covering structure 202 formed by the first covering plate 2021 and the covering channel steel 2022, and then to being larger than the cross-sectional dimension of the covering structure 202 formed by the first covering plate 2021 and the covering channel steel 2022. The cross-sectional dimensions of the final I-shaped steel match the cross-sectional dimensions of the cavity structure of the box-shaped steel, and extend into the cavity structure of the box-shaped steel, so as to facilitate the welding of the I-shaped steel and the box-shaped steel; the cross-sectional dimensions of the first cladding plate 2021 and the cladding channel steel 2022 are changed from a cross-sectional dimension greater than the energy-absorbing core 201, to a cross-sectional dimension equal to the energy-absorbing core 201, and then to a cross-sectional dimension less than the energy-absorbing core 201, and finally extend into the cavity structure of the box-shaped steel with a cross-sectional dimension less than the I-shaped steel. In the transition connection section 3, the first cladding plate 2021 and the cladding channel steel 2022 are both gradual transition structures, so that the I-shaped steel, the first cladding plate 2021 and the cladding channel steel 2022 are all variable cross-sectional structures, so as to avoid a sudden change in stiffness of the I-shaped steel, the first cladding plate 2021 and the cladding channel steel 2022 in the transition connection section 3. Preferably, the gradual transition structure in this embodiment refers to a circular arc transition structure or a triangular transition structure, etc.

[0053] In this embodiment, in the transition connection section 3, the energy dissipation core 201 forms a second core transition section 302 and a core connection section 304 connected to the second core transition section 302, the cladding structure 202 forms a cladding transition section 301 and a cladding connection section 303 connected to the cladding transition section 301, and the core connection section 304 and the cladding connection section 303 both extend into the cavity structure of the middle elastic section 4. Preferably, in the cavity structure of the middle elastic section 4, the length of the core connection section 304 is greater than the length of the cladding connection section 303. Specifically, in this embodiment, the second core transition section 302 and the core connection section 304 are both formed by I-shaped steel, the cladding transition section 301 and the cladding connection section 303 are jointly formed by the first cladding plate 2021 and the cladding channel steel 2022, and in the cavity structure of the middle elastic section 4, the length of the I-shaped steel is greater than the length of the first cladding plate 2021 and the length of the cladding channel steel 2022. Preferably, in the cavity structure of the middle elastic section 4, the length of the first cladding plate 2021 and the length of the cladding channel steel 2022 are equal.

[0054] In this embodiment, the length of the energy dissipation deformation section 2 at one end portion corresponding to the middle elastic section 4 is 1.2 meters, and the length of the corresponding transition connection section 3 is 0.4 meters.

[0055] The buckling-restrained brace structure with enveloping constraint in this embodiment further includes an end connection section 1 connected to the energy dissipation deformation section 2. The end connection section 1 is formed by extending the energy dissipation core 201 outward. The end connection section 1 and the transition connection section 3 are arranged at two opposite ends of the energy dissipation deformation section 2. In the end connection section 1, the energy dissipation core 201 includes a connection section 101, a deformation section 102 and a first core transition section 103 which are sequentially connected along the yielding direction. The first core transition section 103 extends to the energy dissipation deformation section 2 and partially overlaps with the energy dissipation deformation section 2. Specifically, the end connecting section 1 is formed by extending the I-beam outward in a direction away from the middle elastic section 4, and in the end connecting section 1, the I-beam is divided into a connecting section 101, a deformation section 102 and a first core transition section 103 in the yield direction. The connecting section 101 is provided with a connecting hole for connecting with the main body of the building structure; the deformation section 102 is the part between the connecting section 101 and the first core transition section 103, and is used to reserve energy-consuming deformation space for the energy-consuming deformation section 2 to avoid collision between the encapsulation structure 202 and the connecting section 101; the first core transition section 103 is used to overlap and connect with the encapsulation structure 202.

[0056] In this embodiment, the segmented cladding type buckling restraint support also includes a connector 203 for connecting the cladding structure 202, and a pre-tightening member 204 is arranged between the connector 203 and the cladding structure 202, and the pre-tightening member 204 forms a pre-tightening force between the energy dissipation core 201 and the cladding structure 202. Specifically, the connector 203 is used to connect the first cladding plate 2021 above the upper flange plate of the I-shaped steel and the upper flange plate of the cladding channel steel 2022, and the connector 203 is also used to connect the first cladding plate 2021 below the lower flange plate of the I-shaped steel and the lower flange plate of the cladding channel steel 2022. The connector 203 can be a structure such as a bolt or a pin. Preferably, in this embodiment, the connector 203 is a bolt. The pre-tightening member 204 is arranged between the first cladding plate 2021 above the upper flange plate and the connector 203, and between the first cladding plate 2021 below the lower flange plate and the connector 203. The preload member 204 may be a spring, a gasket, a rubber sleeve or the like.

[0057] The buckling-restrained bracing structure with encapsulation constraint in this embodiment comprises a middle elastic section 4 and energy-absorbing deformation sections 2 arranged at opposite ends of the middle elastic section 4, wherein the energy-absorbing deformation section 2 comprises an I-shaped steel and an encapsulated channel steel 2022 and a first encapsulated plate 2021 encapsulated on the periphery of the energy-absorbing core. The utility model arranges the encapsulated channel steel 2022 and the first encapsulated plate 2021 on the periphery of the I-shaped steel to enhance the buckling constraint of the energy-absorbing deformation section 2, ensure that the energy-absorbing deformation section 2 will not be locally unstable, and make the entire buckling-restrained bracing structure with encapsulation constraint maintain elasticity or yield energy dissipation under multiple earthquakes, be in an elastic or yield energy dissipation state under medium earthquakes, and plastically dissipate energy under large earthquakes, giving full play to the good deformation energy dissipation capacity of steel.

[0058] Example 2

[0059] See also Figure 8 and Fig.14 The buckling-restrained bracing structure of this embodiment is different from that of Embodiment 1 in that Fig. 9 In this embodiment, the energy dissipation core 201 is a cross-shaped steel, see Fig.10 and Fig.11 The covering structure 202 is an L-shaped covering channel steel 205, and the L-shaped covering channel steel 205 is arranged in the four grooves formed by the web of the cross-shaped steel. Fig.13 The middle elastic section 4 is a box-shaped steel, and the cross-shaped steel and the L-shaped cladding channel steel 205 are extended into the cavity structure of the box-shaped steel and connected to the box-shaped steel. The cross-sectional size of the box-shaped steel is larger than the cross-sectional size of the energy dissipation deformation section 2 formed by the cross-shaped steel and the L-shaped cladding channel steel 205, so that the segmented cladding anti-buckling restraint support forms a spatial restraint fulcrum in the middle elastic section 4.

[0060] In this embodiment, non-fixed contact means setting a deformation gap between the cross-shaped steel and the L-shaped coated channel steel 205, and the size of the deformation gap can be any one of 3mm, 4mm or 5mm; or setting an elastic buffer layer between the cross-shaped steel and the L-shaped coated channel steel 205; the elastic buffer layer is any one of a polytetrafluoroethylene plate, a plastic plate or a rubber plate. In order to reduce the friction resistance between the cross-shaped steel and the L-shaped coated channel steel 205. Fixed connection means welding the cross-shaped steel to the box-shaped steel, and at the same time welding the cross-shaped steel to the L-shaped coated channel steel 205.

[0061] In this embodiment, the cross-sectional dimension of the box-shaped steel is larger than the cross-sectional dimension of the energy-absorbing deformation section 2 formed by the cross-shaped steel and the L-shaped cladding channel steel 205 .

[0062] See also Fig.12In this embodiment, during the extension of the energy-absorbing core 201 and the cladding structure 202 toward the middle elastic section 4, the cross-sectional dimension of the cross-shaped steel changes from a cross-sectional dimension smaller than that of the L-shaped cladding channel steel 205, to a cross-sectional dimension equal to that of the L-shaped cladding channel steel 205, and then to a cross-sectional dimension larger than that of the L-shaped cladding channel steel 205. Finally, the cross-sectional dimension of the cross-shaped steel matches the cross-sectional dimension of the cavity structure of the box-shaped steel and extends into the cavity structure of the box-shaped steel, so as to facilitate welding of the cross-shaped steel and the box-shaped steel. The cross-sectional dimension of the L-shaped cladding channel steel 205 changes from a cross-sectional dimension larger than that of the cross-shaped steel, to a cross-sectional dimension equal to that of the cross-shaped steel, and then to a cross-sectional dimension smaller than that of the cross-shaped steel. Finally, it extends into the cavity structure of the box-shaped steel with a cross-sectional dimension smaller than that of the cross-shaped steel. In the transition section 3, the cross-shaped steel and the L-shaped coated channel steel 205 are both in a gradual transition structure, so that the cross-shaped steel and the L-shaped coated channel steel 205 are both in a variable cross-section structure, so as to avoid a sudden change in stiffness of the cross-shaped steel and the L-shaped coated channel steel 205 in the transition section 3. Preferably, the gradual transition structure in this embodiment refers to an arc transition structure or a triangular transition structure.

[0063] In this embodiment, in the transition connecting section 3, the energy dissipation core 201 forms a second core transition section 302 and a core connecting section 304 connected to the second core transition section 302, the cladding structure 202 forms a cladding transition section 301 and a cladding connecting section 303 connected to the cladding transition section 301, and the core connecting section 304 and the cladding connecting section 303 both extend into the cavity structure of the middle elastic section 4. Preferably, in the cavity structure of the middle elastic section 4, the length of the core connecting section 304 is greater than the length of the cladding connecting section 303. Specifically, in this embodiment, the second core transition section 302 and the core connecting section 304 are both formed by cross-shaped steel, the cladding transition section 301 and the cladding connecting section 303 are both formed by L-shaped cladding channel steel 205, and in the cavity structure of the middle elastic section 4, the length of the cross-shaped steel is greater than the length of the L-shaped cladding channel steel 205. Preferably, in the cavity structure of the middle elastic section 4, the length of the cross-shaped steel and the length of the L-shaped covering channel steel 205 are equal.

[0064] In this embodiment, the length of the energy dissipation deformation section 2 at one end portion corresponding to the middle elastic section 4 is 1.2 meters, and the length of the corresponding transition connection section 3 is 0.6 meters.

[0065] In this embodiment, the end connecting section 1 is formed by a cross-shaped steel extending outward in a direction away from the middle elastic section 4, and in the end connecting section 1, the cross-shaped steel is divided into a connecting section 101, a deformation section 102 and a first core transition section 103 in sequence along the yield direction. A connecting hole is provided on the connecting section 101 for connecting to the main body of the building structure; the deformation section 102 is the part between the connecting section 101 and the first core transition section 103, and is used to reserve energy-consuming deformation space for the energy-consuming deformation section 2 to avoid collision between the encapsulation structure 202 and the connecting section 101; the first core transition section 103 is used to overlap and connect with the encapsulation structure 202.

[0066] In this embodiment, the connector 203 is used to connect two adjacent L-shaped coated channel steels 205, and a pre-tightening member 204 is provided at the connection between the L-shaped coated channel steel 205 and the cross-shaped steel. The connector 203 can be a structure such as a bolt or a pin. Preferably, in this embodiment, the connector 203 is a bolt. The pre-tightening member 204 can be a structure such as a spring, a gasket, or a rubber sleeve.

[0067] The buckling-resistance bracing structure with encapsulation constraint in this embodiment comprises a middle elastic section 4 and energy-dissipating deformation sections 2 arranged at opposite ends of the middle elastic section 4, wherein the energy-dissipating deformation section 2 comprises a cross-shaped steel and an L-shaped encapsulating channel steel 205. The utility model arranges the L-shaped encapsulating channel steel 205 on the periphery of the cross-shaped steel to enhance the buckling constraint of the energy-dissipating deformation section 2, ensure that the energy-dissipating deformation section 2 will not be locally unstable, and make the entire buckling-resistance bracing structure with encapsulation constraint maintain elasticity or yield energy dissipation under multiple earthquakes, be in an elastic or yield energy dissipation state under medium earthquakes, and plastically dissipate energy under large earthquakes, giving full play to the good deformation energy dissipation capacity of steel.

[0068] Example 3

[0069] See also Fig.15 and Fig.21 The buckling-restrained bracing structure of this embodiment is different from that of Embodiment 1 in that Fig.16 In this embodiment, the energy dissipation core 201 is a straight steel. Fig.17 and Fig.18 The covering structure 202 is a second covering plate 206, and the second covering plate 206 is disposed on the upper end surface and the lower end surface of the straight steel. Fig. 20 The middle elastic section 4 is a box-shaped steel, and the straight steel and the second cladding plate 206 both extend into the cavity structure of the box-shaped steel and are connected to the box-shaped steel. The cross-sectional dimension of the box-shaped steel is larger than the cross-sectional dimension of the energy dissipation deformation section 2 formed by the straight steel and the second cladding plate 206.

[0070] In this embodiment, non-fixed contact means that a deformation gap is set between the straight steel and the second cladding plate 206, and the size of the deformation gap can be any one of 3mm, 4mm or 5mm; or an elastic buffer layer is set between the straight steel and the second cladding plate 206; the elastic buffer layer is any one of a polytetrafluoroethylene plate, a plastic plate or a rubber plate. To reduce the friction resistance between the straight steel and the second cladding plate 206. Fixed connection means that the straight steel is welded to the box steel, and the straight steel is welded to the second cladding plate 206 at the same time.

[0071] In this embodiment, the cross-sectional dimension of the box-shaped steel is larger than the cross-sectional dimension of the energy-absorbing deformation section 2 formed by the straight steel and the second cladding plate 206 .

[0072] See also Fig.19 In this embodiment, during the transition from the energy dissipation deformation section 2 to the intermediate elastic section 4 through the transition connection section 3, the cross-sectional size of the straight steel changes from a cross-sectional size smaller than the second cladding plate 206, to a cross-sectional size equal to the second cladding plate 206, and then to a cross-sectional size larger than the second cladding plate 206. Finally, the cross-sectional size of the straight steel matches the cross-sectional size of the box-shaped steel cavity structure and extends into the cavity structure of the box-shaped steel, which is convenient for welding the straight steel and the box-shaped steel. The cross-sectional size of the second cladding plate 206 changes from a cross-sectional size larger than the straight steel, to a cross-sectional size equal to the straight steel, and then to a cross-sectional size smaller than the straight steel. Finally, it extends into the cavity structure of the box-shaped steel with a cross-sectional size smaller than the straight steel. In the transition connection section 3, the straight steel and the second cladding plate 206 both present a gradual transition structure, so that the straight steel and the second cladding plate 206 are both variable cross-sectional structures, so as to avoid a sudden change in stiffness of the straight steel and the second cladding plate 206 in the transition connection section 3. Preferably, the gradual transition structure in this embodiment refers to an arc transition structure or a triangular transition structure, etc.

[0073] In this embodiment, in the transition connecting section 3, the energy dissipation core 201 forms a second core transition section 302 and a core connecting section 304 connected to the second core transition section 302, the cladding structure 202 forms a cladding transition section 301 and a cladding connecting section 303 connected to the cladding transition section 301, and the core connecting section 304 and the cladding connecting section 303 both extend into the cavity structure of the middle elastic section 4. Preferably, in the cavity structure of the middle elastic section 4, the length of the core connecting section 304 is greater than the length of the cladding connecting section 303. Specifically, in this embodiment, the second core transition section 302 and the core connecting section 304 are both formed by straight steel, the cladding transition section 301 and the cladding connecting section 303 are both formed by the second cladding plate 206, and in the cavity structure of the middle elastic section 4, the length of the straight steel is greater than the length of the second cladding plate 206. Preferably, in the cavity structure of the middle elastic section 4 , the length of the straight steel section is equal to the length of the second cladding plate 206 .

[0074] In this embodiment, the length of the energy dissipation deformation section 2 at one end portion corresponding to the middle elastic section 4 is 1.2 meters, and the length of the corresponding transition connection section 3 is 0.5 meters.

[0075] In this embodiment, the end connecting section 1 is formed by extending the straight steel outward in the direction away from the middle elastic section 4, and in the end connecting section 1, the straight steel is divided into a connecting section 101, a deformation section 102 and a first core transition section 103 in the yield direction. The connecting section 101 is provided with a connecting hole for connecting to the main body of the building structure; the deformation section 102 is the part between the connecting section 101 and the first core transition section 103, and is used to reserve energy-consuming deformation space for the energy-consuming deformation section 2 to avoid collision between the encapsulation structure 202 and the connecting section 101; the first core transition section 103 is used to overlap and connect with the encapsulation structure 202.

[0076] In this embodiment, the connecting member 203 is used to connect the second cladding plate 206 above the straight steel and the second cladding plate 206 below the straight steel, and a pre-tightening member 204 is provided at the connection between the second cladding plate 206 and the straight steel. The connecting member 203 can be a structure such as a bolt or a pin. Preferably, in this embodiment, the connecting member 203 is a bolt. The pre-tightening member 204 can be a structure such as a spring, a gasket, or a rubber sleeve.

[0077] In this embodiment, the second cladding plate 206 can also be replaced by a cladding channel steel 2022. The cladding-constrained buckling-resistant support structure of this embodiment includes a middle elastic section 4 and energy-absorbing deformation sections 2 arranged at opposite ends of the middle elastic section 4, wherein the energy-absorbing deformation section 2 includes a straight steel section and a second cladding plate 206. The utility model arranges a second cladding plate 206 on the periphery of the straight steel section to enhance the buckling constraint of the energy-absorbing deformation section 2, ensure that the energy-absorbing deformation section 2 will not be locally unstable, and enable the entire cladding-constrained buckling-resistant support structure to maintain elasticity or yield energy dissipation under multiple earthquakes, be in an elastic or yield energy dissipation state under moderate earthquakes, and plastically dissipate energy under large earthquakes, giving full play to the good deformation energy dissipation capacity of steel.

[0078] In the above-mentioned Embodiments 1 to 3, the cross-section of the box-shaped steel may be rectangular, square or other shapes.

[0079] The non-fixed contact in the above-mentioned Embodiments 1 to 3 may also be a fixed connection type contact.

[0080] In the above-mentioned embodiments 1 to 3, when the energy-absorbing core 201 is made of straight steel, cross steel and I-steel respectively, the bearing capacity and stiffness of the anti-buckling support structure of the enveloping constraint increase successively, that is, when the energy-absorbing core is straight steel, the bearing capacity and stiffness of the anti-buckling support structure are the smallest, when the energy-absorbing core is I-steel, the bearing capacity and stiffness of the anti-buckling support structure are the largest, and when the energy-absorbing core is cross steel, the bearing capacity and stiffness of the anti-buckling support structure are in an intermediate state.

[0081] It should be noted that the cross-sectional dimensions in the present invention refer to the width and / or height of the cross-section.

[0082] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cladding-constrained buckling-resistance support structure, comprising a middle elastic section (4) and energy-absorbing deformation sections (2) arranged at opposite ends of the middle elastic section (4), characterized in that: The energy-absorbing deformation section (2) comprises an energy-absorbing core (201) and a coating structure (202) coating the outer periphery of the energy-absorbing core (201); the energy-absorbing core (201) and the coating structure (202) both extend to the middle elastic section (4) and are connected to the middle elastic section (4).

2. The cladding-constrained buckling-resistance brace structure according to claim 1, characterized in that: In the energy dissipation deformation section (2), the energy dissipation core (201) and the covering structure (202) are in contact with each other; in the transition connection section (3), the energy dissipation core (201) and the covering structure (202) are fixedly connected, so that the energy dissipation deformation section (2) can be freely deformed along the axial direction under the action of tension and compression.

3. The cladding-constrained buckling-resistance brace structure according to claim 2, characterized in that: The cross-sectional dimension of the middle elastic section (4) is greater than the cross-sectional dimension of the energy-dissipating deformation section (2).

4. The cladding-constrained buckling-resistance brace structure according to claim 2, characterized in that: The encapsulated and constrained anti-buckling support structure further comprises a transition connection section (3) arranged between the energy-absorbing deformation section (2) and the intermediate elastic section (4); the transition connection section (3) is formed in the process of the energy-absorbing core (201) and the encapsulating structure (202) extending toward the intermediate elastic section (4).

5. The cladding-constrained buckling-resistance brace structure according to claim 4, characterized in that: In the transition connection section (3), the energy dissipation core (201) and the coating structure (202) are both gradually transition structures, and the cross-sectional dimension of the energy dissipation core (201) changes from being smaller than the cross-sectional dimension of the coating structure (202), to being equal to the cross-sectional dimension of the coating structure (202), and then to being larger than the cross-sectional dimension of the coating structure (202); The cross-sectional dimension of the coating structure (202) changes from a cross-sectional dimension greater than that of the energy-consuming core (201), to a cross-sectional dimension equal to that of the energy-consuming core (201), and then to a cross-sectional dimension less than that of the energy-consuming core (201); so that the energy-consuming core (201) and the coating structure (202) are both variable cross-sectional structures.

6. The cladding-constrained buckling-resistance brace structure according to claim 4, characterized in that: The length of the transition connection section (3) is 1 / 3 to 1 / 2 of the length of the energy-dissipating deformation section (2).

7. The cladding-constrained buckling-resistance brace structure according to claim 2, characterized in that: The contact refers to setting a deformation gap between the energy-consuming core (201) and the covering structure (202), or setting an elastic buffer layer between the energy-consuming core (201) and the covering structure (202); so as to reduce the friction resistance between the energy-consuming core (201) and the covering structure (202).

8. The cladding-constrained buckling-resistance brace structure according to claim 4, characterized in that: The encapsulated and constrained anti-buckling support structure also includes an end connection section (1) connected to the energy dissipation deformation section (2); the end connection section (1) is formed by extending the energy dissipation core (201) outward; and the end connection section (1) and the transition connection section (3) are arranged at two opposite ends of the energy dissipation deformation section (2).

9. The cladding-constrained buckling-resistance brace structure according to claim 8, characterized in that: In the end connecting section (1), the energy-absorbing core (201) comprises a connecting section (101), a deformation section (102) and a first core transition section (103) which are sequentially connected along the yield direction; the first core transition section (103) extends to the energy-absorbing deformation section (2) and partially overlaps with the energy-absorbing deformation section (2).

10. The cladding-constrained buckling-resistance brace structure according to claim 1, characterized in that: The energy dissipation core (201) is an I-shaped steel, a cross-shaped steel or a straight-shaped steel; when the energy dissipation core (201) is an I-shaped steel, the cladding structure (202) is a cladding channel steel (2022) arranged in a groove of the I-shaped steel and a first cladding plate (2021) respectively arranged above an upper flange plate of the I-shaped steel and below a lower flange plate of the I-shaped steel; when the energy dissipation core (201) is a cross-shaped steel, the cladding structure (202) is an L-shaped cladding channel steel (205) arranged close to a web plate of the cross-shaped steel; when the energy dissipation core (201) is a straight-shaped steel, the cladding structure (202) is a second cladding plate (206) respectively arranged above and below the straight-shaped steel.

Images