Multi-order buckling restrained brace device and anti-seismic building

Abstract

The utility model relates to the field of anti-seismic devices, in particular to a multi-order buckling restrained brace device and an anti-seismic building. The multi-order buckling restrained brace device comprises an outer restrained component, a filler and an energy-consuming inner core. The outer restraining component is arranged outside the energy dissipation inner core in a sleeving mode, and the two ends of the energy dissipation inner core extend out of the outer restraining component. The space between the outer constraint component and the energy consumption inner core is filled with the filler. The energy consumption inner core comprises a first inner core plate and a second inner core plate, and the first inner core plate is connected with the second inner core plate; the first inner core plate has first yield strength, and the second inner core plate has second yield strength. According to the multi-order buckling restrained brace device, the multi-order buckling restrained brace energy dissipation and shock absorption design is adopted, multiple times of yielding can be achieved, and therefore the staged energy dissipation effect of small earthquakes, medium earthquakes and large earthquakes can be achieved, a main body structure can be well protected, the main body structure can be prevented from being seriously damaged in the small earthquakes, the medium earthquakes and the large earthquakes, and the service life of the main body structure is prolonged. And convenience is brought to post-earthquake repair.

Description

Technical Field

[0001] This application relates to the field of seismic devices, and in particular to a multi-stage buckling restraint brace and a seismic-resistant building. Background Technology

[0002] Buckling-restrained braces (BRBs) offer good seismic performance and are widely used in building engineering. However, traditional BRBs have a single core material and a simple construction. For example... Figure 1 As shown in the figure, the force-displacement relationship curve of a traditional buckling-restrained brace is illustrated. Buckling-restrained braces can only achieve yielding once, with a single yield point. Although yielding can dissipate the energy input from the earthquake, the structural displacement increases rapidly, causing severe damage to the main structure it supports and complicating post-earthquake repair. Utility Model Content

[0003] The purpose of this application is to provide a multi-stage buckling restraint brace and seismic-resistant building to solve the problem that existing buckling restraint braces can only achieve yielding once.

[0004] This application provides a multi-stage buckling restraint support device, including an outer restraint member, a filler material, and an energy-dissipating inner core;

[0005] The outer constraint member is sleeved on the outside of the energy-dissipating inner core, and both ends of the energy-dissipating inner core extend out of the outer constraint member; the filler is filled between the outer constraint member and the energy-dissipating inner core;

[0006] The energy-consuming core includes a first inner core plate and a second inner core plate, and the first inner core plate is connected to the second inner core plate; the first inner core plate has a first yield strength, and the second inner core plate has a second yield strength.

[0007] In the above technical solution, the length direction of the first inner core plate is the length direction of the outer constraint member, and both ends of the first inner core plate extend out of the outer constraint member in the length direction.

[0008] The length direction of the second inner core plate is the length direction of the outer constraint member, and both ends of the second inner core plate extend out of the outer constraint member in the length direction;

[0009] The surface of the first inner core plate is perpendicular to the surface of the second inner core plate.

[0010] In the above technical solution, the second inner core plate further includes a first plate and / or a second plate;

[0011] In the width direction of the first inner core plate, the first plate is provided in the middle of the first inner core plate, and / or the second plate is provided at the end of the first inner core plate.

[0012] In the above technical solution, when the first plate is provided in the middle of the width direction of the first inner core plate, the first plate is connected to the middle of both sides of the first inner core plate in the thickness direction, and the two first plates are arranged opposite to each other so that the cross section of the energy-consuming inner core is cross-shaped.

[0013] In the above technical solution, when the second plate is provided at the end of the first inner core plate in the width direction, the second plate is connected to both ends of the first inner core plate so that the cross-section of the energy-consuming inner core is I-shaped.

[0014] In the above technical solution, when the first plate is provided in the middle of the width direction of the first inner core plate and the second plate is provided at the end of the width direction of the first inner core plate, the first plate is connected to the middle of both sides of the first inner core plate in the thickness direction, and the second plate is connected to both ends of the first inner core plate, so that the cross-section of the energy-consuming inner core is in the shape of a Chinese character.

[0015] In the above technical solution, when the second plate is not provided at both ends of the width direction of the first inner core plate, the first inner core plate includes a first energy-dissipating segment and a first connecting segment; the first energy-dissipating segment is located inside the outer constraint member, and the first connecting segment is provided at both ends of the length direction of the first energy-dissipating segment, and the first connecting segment is located outside the outer constraint member; the width of the first connecting segment is greater than the width of the first energy-dissipating segment, and a transition portion with a gradually changing width is provided between the first energy-dissipating segment and the first connecting segment;

[0016] When the second plate is provided at both ends of the width direction of the first inner core plate, the first inner core plate is a rectangular plate;

[0017] The first plate includes a second energy-dissipating segment and a second connecting segment; the second energy-dissipating segment is located inside the external constraint member, and the second connecting segment is provided at both ends of the length direction of the second energy-dissipating segment, and the second connecting segment is located outside the external constraint member; the width of the second connecting segment is greater than the width of the second energy-dissipating segment, and a transition portion with a gradually changing width is provided between the second energy-dissipating segment and the second connecting segment.

[0018] In the above technical solution, the first inner core plate further includes a first transition section located between the first energy-consuming section and the first connecting section; the first transition section is provided between each end of the first energy-consuming section and the corresponding first connecting section, the portion of the first transition section near the first energy-consuming section is located inside the external constraint member, and the portion of the first transition section near the first connecting section is located outside the external constraint member; the widths of the first energy-consuming section, the first transition section, and the first connecting section increase sequentially, and a gradually changing transition portion is provided between the first energy-consuming section and the first transition section, and between the first transition section and the first connecting section;

[0019] The first plate also includes a second transition section located between the second energy-consuming section and the second connecting section; a second transition section is provided between each end of the second energy-consuming section and the corresponding second connecting section, the portion of the second transition section near the second energy-consuming section is located inside the external constraint member, and the portion of the second transition section near the first connecting section is located outside the external constraint member; the widths of the second energy-consuming section, the second transition section and the second connecting section increase sequentially, and a transition portion with gradually changing width is provided between the second energy-consuming section and the second transition section, and between the second transition section and the second connecting section.

[0020] In the above technical solution, the second plate includes a third energy-consuming segment and a third connecting segment; the third connecting segment is provided at both ends of the length direction of the third energy-consuming segment, and the third connecting segment is located outside the external constraint member; the width of the third connecting segment is greater than the width of the third energy-consuming segment, and a transition portion with a gradually changing width is provided between the third energy-consuming segment and the third connecting segment.

[0021] This application also provides a seismic-resistant building, including the multi-stage buckling restraint brace described in the above-described scheme.

[0022] Compared with the prior art, the beneficial effects of this application are as follows:

[0023] The multi-stage buckling restraint brace provided in the application adopts a multi-stage buckling restraint brace energy dissipation and vibration reduction design, which can achieve multiple yielding. Therefore, it can realize the energy dissipation function in stages during small, moderate and large earthquakes, and can better protect the main structure, so that the main structure can be spared from serious damage in small, moderate and large earthquakes, and facilitate post-earthquake repair.

[0024] This application also provides earthquake-resistant buildings, including the multi-stage buckling-restrained bracing device described in the above scheme. Based on the above analysis, it is clear that earthquake-resistant buildings also possess the aforementioned beneficial effects, which will not be elaborated upon further here. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 The force-displacement curve represents a traditional buckling-restrained brace.

[0027] Figure 2 Force-displacement curves for the multi-stage buckling restraint brace provided in this application;

[0028] Figure 3 A schematic diagram of the multi-stage buckling restraint support device with a cross-shaped energy-dissipating inner core provided in this application;

[0029] Figure 4 for Figure 3 Schematic diagram of the cross section at point AA;

[0030] Figure 5 A schematic diagram of the multi-stage buckling restraint support device with an I-shaped energy-dissipating inner core provided in this application;

[0031] Figure 6 for Figure 5 Schematic diagram of the cross section at point BB;

[0032] Figure 7 A schematic diagram of the multi-stage buckling restraint support device with a king-shaped energy-dissipating inner core provided in this application;

[0033] Figure 8 for Figure 7 Schematic diagram of the cross section at point C;

[0034] Figure 9 This is a first structural schematic diagram of the first inner core plate provided in this application;

[0035] Figure 10 This is a schematic diagram of the second structure of the first inner core plate provided in this application;

[0036] Figure 11 A first structural schematic diagram of the first plate provided in this application;

[0037] Figure 12 A structural schematic diagram of the second plate provided in this application;

[0038] Figure 13 A second structural schematic diagram of the first plate provided in this application.

[0039] In the diagram: 101 - External constraint component; 102 - Filler material; 103 - Energy-dissipating inner core; 104 - First inner core plate; 105 - First plate; 106 - Second plate; 107 - First energy-dissipating section; 108 - First connecting section; 109 - Second energy-dissipating section; 110 - Second connecting section; 111 - Third energy-dissipating section; 112 - Third connecting section; 113 - First transition section; 114 - Second transition section. Detailed Implementation

[0040] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "third," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Example 1

[0044] The multi-stage buckling-restrained brace device provided in this application employs a multi-stage buckling-restrained brace energy dissipation and vibration reduction design, enabling multiple yielding events. Therefore, it can achieve staged energy dissipation during minor, moderate, and major earthquakes. Figure 2 As shown in the figure, the force-displacement relationship curve of the multi-stage buckling restraint support device provided in this application is illustrated.

[0045] The multi-stage buckling-restrained brace (MSB) provided in this application can be applied to the fields of building structure vibration reduction, infrastructure vibration reduction, and cultural relic vibration reduction. In engineering applications, the MSB is installed in buildings without affecting the structural functionality or the building's aesthetics, and can further improve the building's reliability and safety. The MSB not only solves the problem of ordinary braces buckling under compression during major earthquakes, but also plays a role in damage control. This structure transforms the original energy dissipation method, which involved forming plastic hinges at the beam ends of the main structure, into energy dissipation concentrated only on the MSB, while the main structure largely remains elastic. This effectively protects the main structure (beams and columns), preventing severe damage during minor, moderate, and major earthquakes, and facilitating post-earthquake repair.

[0046] Furthermore, under conditions of significant stress variation, multi-stage buckling-restrained bracing (MSB) devices and connection node devices used in engineering can improve the bearing capacity of node connections and solve problems such as poor out-of-plane stability of gusset plates. MSB devices have clearly defined multi-stage yield points and can act as a "fuse" under minor, moderate, and major earthquakes, protecting the main structure from yielding or severe damage under these conditions, and facilitating the replacement of damaged supports after the earthquake.

[0047] See Figures 3 to 13 As shown, specifically, the multi-stage buckling restraint brace provided in this application includes an outer restraint member 101, a filler material 102, and an energy-dissipating inner core 103. The outer restraint member 101 is fitted over the energy-dissipating inner core 103, and both ends of the energy-dissipating inner core 103 extend beyond the outer restraint member 101 for welding or bolting to nodes in the main structure. The filler material 102 fills the space between the outer restraint member 101 and the energy-dissipating inner core 103, thus connecting the three components into a single unit. The filler material 102 is generally concrete, and the outer restraint member 101 is filled with concrete, which encloses the energy-dissipating inner core 103 to form a columnar support structure.

[0048] Furthermore, the energy-dissipating core 103 includes a first core plate 104 and a second core plate, with the first core plate 104 and the second core plate welded together to form the skeleton of the multi-stage buckling restraint brace. The first core plate 104 has a first yield strength, and the second core plate has a second yield strength. The first yield strength and the second yield strength are not equal, and either the first core plate 104 or the second core plate can have a higher yield strength. When the multi-stage buckling restraint brace encounters an earthquake, the core material with the lower yield point in the first core plate 104 and the second core plate yields first. As the earthquake intensity increases, the core material with the higher yield point in the first core plate 104 and the second core plate can undergo secondary yielding and energy dissipation, thus achieving a staged energy dissipation effect.

[0049] In this optional embodiment, the length direction of the first inner core plate 104 is the same as the length direction of the outer constraint member 101, and both ends of the first inner core plate 104 extend beyond the outer constraint member 101 in the length direction; the length direction of the second inner core plate is the same as the length direction of the outer constraint member 101, and both ends of the second inner core plate extend beyond the outer constraint member 101 in the length direction. Specifically, the length of the first inner core plate 104 is equal to the length of the second inner core plate, and the two are connected and extend to the outside of the outer constraint member 101, and the surface of the first inner core plate 104 is perpendicular to the surface of the second inner core plate, thereby forming a relatively stable skeleton.

[0050] In an optional embodiment, the second inner core plate includes a first plate 105 and / or a second plate 106. In the width direction of the first inner core plate 104, the first plate 105 is disposed at the middle of the first inner core plate 104, and / or the second plate 106 is disposed at the end of the first inner core plate 104. Specifically, the structure of the second inner core plate can be configured according to the application scenario of the multi-stage buckling restraint brace. The greater the support force that the multi-stage buckling restraint brace needs to withstand, the more plates are required to form the energy-dissipating inner core 103, and the larger the size of the plates.

[0051] The following describes the structures of three types of energy-consuming core 103:

[0052] (1) As Figure 3 and Figure 4 As shown in the figure, the cross-section of the energy-dissipating inner core 103 is cross-shaped. This type of energy-dissipating inner core 103 is generally used in working conditions where the supporting force is relatively small. In this case, a first plate 105 is provided in the middle of the width direction of the first inner core plate 104, and in the thickness direction of the first inner core plate 104, the middle of both sides of the first inner core plate 104 are connected to the first plate 105, and the two first plates 105 are arranged opposite to each other, thus forming a stable cross-shaped structure. The cross-shaped energy-dissipating inner core 103 is composed of three plates: the first inner core plate 104 and the two first plates 105. The width of the first inner core plate 104 is relatively wide, but the width of the two first plates 105 on the left and right sides of the first inner core plate 104 is relatively narrow, and their supporting force is relatively small.

[0053] (2) Figure 5 and Figure 6As shown in the figure, the cross-section of the energy-dissipating inner core 103 shown is I-shaped. Compared with the energy-dissipating inner core 103 with the above-mentioned cross-shaped structure, the energy-dissipating inner core 103 with the I-shaped structure generally has relatively large supporting force. At this time, both ends in the width direction of the first inner core plate 104 are connected with second plate members 106, thereby forming a structurally stable I-shaped structure. The energy-dissipating inner core 103 with the I-shaped structure is composed of three plates including the first inner core plate 104 and two second plate members 106. However, the width of the first inner core plate 104 is relatively close to the width of the second plate member 106, and their width dimensions are relatively large, so it has greater supporting force.

[0054] (3) As Figure 7 and Figure 8 As shown in the figure, the cross-section of the energy-dissipating inner core 103 shown is king-shaped. Compared with the energy-dissipating inner core 103 with the above-mentioned cross-shaped structure and the energy-dissipating inner core 103 with the I-shaped structure, the energy-dissipating inner core 103 with the king-shaped structure has the greatest supporting force. At this time, a first plate member 105 is arranged in the middle of the width direction of the first inner core plate 104. In the thickness direction of the first inner core plate 104, the middle parts on both sides of the first inner core plate 104 are correspondingly connected with the first plate member 105; and both ends in the width direction of the first inner core plate 104 are connected with second plate members 106, thereby forming the most stable king-shaped structure. The energy-dissipating inner core 103 with the king-shaped structure is composed of five plates including the first inner core plate 104, two first plate members 105, and two second plate members 106. The number of plates forming the energy-dissipating inner core 103 is large and the structural stability is high, so it has the greatest supporting force.

[0055] Embodiment Two

[0056] The multi-stage buckling-restrained brace device in this Embodiment Two is an improvement based on the above-mentioned embodiment. The technical content disclosed in the above-mentioned embodiment will not be described repeatedly, and the content disclosed in the above-mentioned embodiment also belongs to the content disclosed in this Embodiment Two.

[0057] In an optional solution of this embodiment, for Figure 4 the cross-shaped energy-dissipating inner core 103 shown, only two relatively narrow first plate members 105 are arranged in the middle of the width direction of the first inner core plate 104, and no second plate member 106 is arranged at both ends in the width direction of the first inner core plate 104. The width of the first inner core plate 104 is not affected by other plates, and its structure can be set according to the functions to be achieved.

[0058] Specifically, as Figure 9The first inner core plate 104 shown includes a first energy dissipation section 107 and a first connection section 108. The first energy dissipation section 107 is located within the outer restraint member 101. The width of the first energy dissipation section 107 is relatively narrow, and during an earthquake, the first energy dissipation section 107 is more likely to deform to dissipate energy and reduce vibration. At both ends in the length direction of the first energy dissipation section 107, there are provided first connection sections 108. The first connection sections 108 are located outside the outer restraint member 101 and are used to connect to the main structure. The width of the first connection section 108 is greater than the width of the first energy dissipation section 107. The first connection section 108 has a larger size and higher strength so that the connection with the main structure is not easily deformed, thus ensuring stable connection. Moreover, a transition section with a gradually changing width is provided between the first energy dissipation section 107 and the first connection section 108 to enable the smooth transfer of structural internal forces and avoid stress concentration. The first inner core plate 104 is always in an elastic state during the working process, and it is ensured that the core unit, the first energy dissipation section 107, can generate sufficient plastic deformation to dissipate energy.

[0059] For Figure 6 the energy dissipation inner core 103 of the I-shaped structure shown and Figure 8 the energy dissipation inner core 103 of the king-shaped structure shown, at both ends in the width direction of the first inner core plate 104, there are provided second plate members 106. Since the distance between the two second plate members 106 remains unchanged, the first inner core plate 104 has a constant width, and the first inner core plate 104 is set as Figure 10 the rectangular plate shown. The widths of the first plate member 105 and the second plate member 106 are not affected by other plates, and their structures can be set according to the functions to be achieved.

[0060] Specifically, as Figure 11 shown, the first plate member 105 includes a second energy dissipation section 109 and a second connection section 110. The second energy dissipation section 109 is located within the outer restraint member 101. The width of the second energy dissipation section 109 is relatively narrow, and during an earthquake, the second energy dissipation section 109 is more likely to deform to dissipate energy and reduce vibration. At both ends in the length direction of the second energy dissipation section 109, there are provided second connection sections 110. The second connection sections 110 are located outside the outer restraint member 101 and are used to connect to the main structure. The width of the second connection section 110 is greater than the width of the second energy dissipation section 109. The second connection section 110 has a larger size and higher strength so that the connection with the main structure is not easily deformed, thus ensuring stable connection. Moreover, a transition section with a gradually changing width is provided between the second energy dissipation section 109 and the second connection section 110 to enable the smooth transfer of structural internal forces and avoid stress concentration. The first plate member 105 is always in an elastic state during the working process, and it is ensured that the core unit, the second energy dissipation section 109, can generate sufficient plastic deformation to dissipate energy.

[0061] Similarly, as Figure 12As shown, the second plate 106 includes a third energy-dissipating section 111 and a third connecting section 112. The third energy-dissipating section 111 is located inside the outer constraint member 101. The third energy-dissipating section 111 is narrower, making it easier to deform during an earthquake to dissipate energy and reduce vibration. Third connecting sections 112 are provided at both ends of the length of the third energy-dissipating section 111. The third connecting sections 112 are located outside the outer constraint member 101 and are used to connect to the main structure. The width of the third connecting section 112 is greater than that of the third energy-dissipating section 111. The third connecting section 112 is larger and stronger, making its connection with the main structure less prone to deformation, thus ensuring connection stability. Furthermore, a gradually changing width transition section is provided between the third energy-dissipating section 111 and the third connecting section 112 to ensure smooth transmission of internal forces and avoid stress concentration. The second plate 106 remains in an elastic state during operation, ensuring that the core unit, the third energy-dissipating section 111, can generate sufficient plastic deformation to dissipate energy.

[0062] In the optional scheme of this embodiment, for Figure 4 As shown in the cross-shaped energy-dissipating inner core 103, since it is applied to working conditions requiring low support force, the width of the first energy-dissipating section 107 is generally narrow, making it more susceptible to deformation and energy dissipation under stress. This results in a large width difference between the first energy-dissipating section 107 and the first connecting section 108, which makes it easy for the two ends of the first energy-dissipating section 107 and the positions corresponding to the two ends of the external constraint member 101 to break.

[0063] To solve the above problems, such as Figure 9 As shown, the first inner core plate 104 is further provided with a first transition section 113 between the first energy dissipation section 107 and the first connecting section 108. The portion of the first transition section 113 near the first energy dissipation section 107 is located inside the outer constraint member 101, and the portion of the first transition section 113 near the first connecting section 108 is located outside the outer constraint member 101. The widths of the first energy dissipation section 107, the first transition section 113, and the first connecting section 108 increase sequentially, thereby increasing the strength of the first inner core plate 104 at positions corresponding to both ends of the outer constraint member 101 to prevent fracture at these locations. Furthermore, gradually changing transition portions are provided between the first energy dissipation section 107 and the first transition section 113, and between the first transition section 113 and the first connecting section 108, to ensure smooth transmission of internal forces and avoid stress concentration.

[0064] like Figure 13As shown, similar to the structure of the first inner core plate 104, the first plate 105 has a second transition section 114 between the second energy-dissipating section 109 and the second connecting section 110. The portion of the second transition section 114 near the second energy-dissipating section 109 is located inside the outer constraint member 101, while the portion near the first connecting section 108 is located outside the outer constraint member 101. The widths of the second energy-dissipating section 109, the second transition section 114, and the second connecting section 110 increase sequentially, thereby increasing the strength of the first plate 105 at positions corresponding to both ends of the outer constraint member 101 to prevent breakage at these locations. Furthermore, gradually changing transition portions are provided between the second energy-dissipating section 109 and the second transition section 114, and between the second transition section 114 and the second connecting section 110, to ensure smooth transmission of internal forces and prevent stress concentration.

[0065] Example 3

[0066] Embodiment 3 of this application provides an earthquake-resistant building, including the multi-stage buckling restraint brace of any of the above embodiments. Therefore, it has all the beneficial technical effects of the multi-stage buckling restraint brace of any of the above embodiments, which will not be repeated here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application. In addition, those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

Claims

1. A multi-stage buckling-restrained brace device, characterized by, The energy dissipation inner core comprises a first inner core plate and a second inner core plate, and the first inner core plate is connected with the second inner core plate; the first inner core plate has a first yield strength, and the second inner core plate has a second yield strength. The length direction of the first inner core plate is the length direction of the outer constraint member, and both ends of the length direction of the first inner core plate extend out of the outer constraint member. The length direction of the second inner core plate is the length direction of the outer constraint member, and both ends of the length direction of the second inner core plate extend out of the outer constraint member.

2. The multi-story buckling-restrained bracing apparatus according to claim 1, characterized by, The plate surface of the first inner core plate is perpendicular to the plate surface of the second inner core plate. The second inner core plate comprises a first plate piece and / or a second plate piece. In the width direction of the first inner core plate, the middle part of the first inner core plate is provided with the first plate piece, and / or the end part of the first inner core plate is provided with the second plate piece.

3. The multi-story buckling-restrained bracing apparatus according to claim 2, characterized by, When the middle part of the first inner core plate in the width direction is provided with the first plate piece, in the thickness direction of the first inner core plate, the middle parts of both sides of the first inner core plate are connected with the first plate piece, and the two first plate pieces are oppositely arranged, so that the cross section of the energy dissipation inner core is cross-shaped. When the end part of the first inner core plate in the width direction is provided with the second plate piece, both ends of the first inner core plate are connected with the second plate piece, so that the cross section of the energy dissipation inner core is H-shaped.

4. The multi-story buckling-restrained bracing apparatus according to claim 3, characterized by, When the middle part of the first inner core plate in the width direction is provided with the first plate piece, and the end part of the first inner core plate in the width direction is provided with the second plate piece, in the thickness direction of the first inner core plate, the middle parts of both sides of the first inner core plate are correspondingly connected with the first plate piece, and both ends of the first inner core plate are connected with the second plate piece, so that the cross section of the energy dissipation inner core is king-shaped.

5. The multi-story buckling-restrained bracing apparatus according to claim 3, characterized by, When both ends of the first inner core plate in the width direction are not provided with the second plate piece, the first inner core plate comprises a first energy dissipation section and a first connecting section; the first energy dissipation section is located in the outer constraint member, both ends of the length direction of the first energy dissipation section are provided with the first connecting section, and the first connecting section is located outside the outer constraint member; the width of the first connecting section is greater than the width of the first energy dissipation section, and a transition part with gradually changing width is arranged between the first energy dissipation section and the first connecting section; 6. The multi-story buckling-restrained bracing device according to claim 3, wherein When both ends of the first inner core plate in the width direction are provided with the second plate piece, the first inner core plate is a rectangular plate; 7. The multi-story buckling-restrained bracing apparatus according to claim 3, characterized by, The first plate piece comprises a second energy dissipation section and a second connecting section; the second energy dissipation section is located in the outer constraint member, both ends of the length direction of the second energy dissipation section are provided with the second connecting section, and the second connecting section is located outside the outer constraint member; the width of the second connecting section is greater than the width of the second energy dissipation section, and a transition part with gradually changing width is arranged between the second energy dissipation section and the second connecting section. ​ ​ 8. The multi-story buckling-restrained bracing apparatus according to claim 7, characterized by, The first inner core plate further comprises a first transition section between the first energy dissipation section and the first connecting section; the first transition section is arranged between the two ends of the first energy dissipation section and the corresponding first connecting section, the part of the first transition section close to the first energy dissipation section is located in the outer constraint member, and the part of the first transition section close to the first connecting section is located outside the outer constraint member; the widths of the first energy dissipation section, the first transition section and the first connecting section gradually increase in sequence, and the transition part with gradually changing width is arranged between the first energy dissipation section and the first transition section and between the first transition section and the first connecting section; The first plate member further comprises a second transition section between the second energy dissipation section and the second connecting section; the second transition section is arranged between the two ends of the second energy dissipation section and the corresponding second connecting section, the part of the second transition section close to the second energy dissipation section is located in the outer constraint member, and the part of the second transition section close to the first connecting section is located outside the outer constraint member; the widths of the second energy dissipation section, the second transition section and the second connecting section gradually increase in sequence, and the transition part with gradually changing width is arranged between the second energy dissipation section and the second transition section and between the second transition section and the second connecting section.

9. The multi-story buckling-restrained bracing apparatus according to claim 3, characterized by, The second plate member comprises a third energy dissipation section and a third connecting section; the two ends of the third energy dissipation section in the length direction are both provided with the third connecting section, and the third connecting section is located outside the outer constraint member; the width of the third connecting section is greater than the width of the third energy dissipation section, and the transition part with gradually changing width is arranged between the third energy dissipation section and the third connecting section.

10. A seismic building, characterized by The multi-stage buckling-restrained brace device comprises the multi-stage buckling-restrained brace device according to any one of claims 1 to 9.

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