Adjustable segmented-multistage composite type buckling-restrained energy dissipation device

Abstract

The present application relates to a kind of adjustable segmented-multistage composite type buckling-restrained energy dissipation device, belong to civil engineering energy dissipation and shock absorption technical field.The buckling-restrained energy dissipation device is overall "Z" type, including hinged bracing, energy dissipation unit, limiting unit and connecting piece;Energy dissipation unit is oppositely arranged at the end of oblique hinged bracing, energy dissipation unit other end is provided with limiting unit, and hinged bracing and energy dissipation unit are connected with the inside of controlled structure beam by connecting piece;Limiting unit is vertically connected with the inside of controlled structure beam.The present application is simple in structure and can be assembled, has segmented-multistage buckling energy dissipation function, has the function of adjustable additional stiffness and using space and post-earthquake recoverable function.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of energy dissipation devices, in particular, a kind of adjustable segmented-multilevel composite buckling-restrained energy dissipation device, belongs to civil engineering energy dissipation and shock mitigation technical field. BACKGROUND

[0002] According to statistics, about 5 million earthquakes occur on earth every year, that is, tens of thousands of earthquakes occur every day. The damage, failure and collapse of building structures caused by earthquakes are one of the main disasters that threaten human life and property safety.

[0003] Unlike the "hard resistance" mode of seismic design, energy dissipation and shock mitigation technology improves the seismic safety of building structures by setting damping devices in the building structures. When the controlled structure absorbs seismic energy, the energy dissipation component or additional damping device can participate in the vibration of the structure and start the energy dissipation and shock mitigation mode, thereby dissipating the energy input into the controlled structure by the earthquake. In theory, energy dissipation and shock mitigation technology can achieve controllable damage of building structures, improve the seismic performance of building structures, and enhance the recoverable function of building structures.

[0004] At present, new energy dissipation and shock mitigation devices are emerging, and there are more in scientific research and engineering practice: metal damper, viscous damper, viscoelastic damper, tuned damper, buckling-restrained brace, etc. Among them, the viscous damper and the buckling-restrained brace are widely used, and the application and promotion of the buckling-restrained brace are more promising due to lower maintenance requirements. It should be pointed out that the traditional buckling-restrained brace generally has the problems of large local stiffness influence on the structure, single energy dissipation mode, harsh energy dissipation and shock mitigation conditions (only in large earthquakes can the energy dissipation and shock mitigation function be played), poor post-earthquake recoverable function (such as CN104246095A discloses a buckling-restrained brace and a load-bearing structure incorporating the buckling-restrained brace, and CN204919858U a buckling-restrained brace component). In recent years, with the requirement of the state for resilient cities and resilient structures, the recoverable function of building structures under the condition of earthquakes and other natural disasters is paid more and more attention, which requires the energy dissipation and shock mitigation technology such as buckling-restrained brace to develop towards multi-function, recoverable and assembly.

[0005] Therefore, the present application provides an adjustable segmented-multilevel composite buckling-restrained energy dissipation device, which can effectively control the inter-story relative displacement of the structure under multi-level seismic action and achieve segmented-multilevel energy dissipation and shock mitigation under small and large earthquakes. The energy dissipation unit, limiting unit and connecting piece in the device are all assembly components, which can realize fast post-earthquake function recovery of the device. SUMMARY

[0006] In view of the above defects of the prior art, the present application provides an adjustable segmented-multilevel composite buckling-restrained energy dissipation device, which can effectively control the relative displacement between layers of a structure under multilevel seismic action and achieve the segmented-multilevel energy dissipation and shock absorption under small and large earthquakes, and the energy dissipation unit, the limiting unit and the connecting piece in the device are all assembly components, so that the post-earthquake function of the device can be quickly restored.

[0007] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0008] The present application provides an adjustable segmented-multilevel composite buckling-restrained energy dissipation device, which is in the shape of a "Z" as a whole and comprises a hinged diagonal brace, an energy dissipation unit, a limiting unit and a connecting piece. The hinged diagonal brace comprises a first angle steel, a second angle steel, an outer cylinder, an inner cylinder and a core shaft.

[0009] Further, the hinged diagonal brace comprises a first angle steel, a second angle steel, an outer cylinder, an inner cylinder and a core shaft.

[0010] The first angle steel has a first horizontal segment steel plate at one end and is cut into a comb shape at the other end. The second angle steel has a second horizontal segment steel plate at one end and is not processed at the other end. The side surfaces of the first angle steel and the second angle steel are provided with protruding connecting plates of the same size for welding connection with the buckling strips of the energy dissipation unit. The second angle steel is welded to the outer cylinder, the inner cylinder is inserted into the outer cylinder, the end key teeth of the first angle steel are inserted into the outer cylinder and are welded to the inner cylinder, and the core shaft is welded to the inner cylinder, so as to finally form the hinged diagonal brace.

[0011] The top end of the first angle steel and the bottom end of the second angle steel are connected to the controlled structure beam through the connecting steel plate and the tensioning screw in the connecting piece, so as to form a support system.

[0012] Further, the protruding connecting plates on the side surfaces of the first angle steel and the second angle steel are in opposite directions.

[0013] Further, the outer cylinder is provided with rectangular holes of the same size at intervals, so that the comb teeth at one end of the first angle steel can pass through the rectangular holes and be welded to the inner cylinder.

[0014] Further, the inner cylinder is formed by welding three short cylinders through short steel sheets, and the positions of the short cylinders on the inner cylinder correspond to the positions of the rectangular holes of the outer cylinder. The cross-sectional shape of the core shaft is cross-shaped, and the core shaft functions to fix the positions of the outer cylinder and the inner cylinder, so that the two can rotate around themselves.

[0015] Further, the energy dissipation unit comprises buckling strips and connecting plates; the connecting plates are arranged outside the first horizontal section steel plates, and connecting steel plates are arranged outside the connecting plates; the buckling strips are divided into i layers (i=1, 2, 3, …, m) in the vertical direction and j columns (j=1, 2, 3, …, n) in the horizontal direction; one end of the buckling strips at the top and the bottom is welded to the side of the connecting plate, and the other end is connected to the limiting unit; one end of the buckling strips in the middle part is welded to the protruding connecting plate on the side of the first angle steel and the second angle steel, and the other end is connected to the limiting unit; in actual use, the energy dissipation device can be segmented and multi-stage energy dissipated by restraining and releasing any level of the limiting unit.

[0016] Further, the limiting unit comprises limiting blocks and limiting plates; the limiting blocks are welded to the buckling strips; the limiting plates comprise top plates and plate bodies, and the cross section of the limiting plate is T-shaped, the width is d, and the top plate at the end of the limiting plate is connected to the controlled structural beam through a high-strength friction type bolt, which is reserved in the controlled structural beam, and the plate body is connected to the limiting block through a high-strength friction type bolt.

[0017] Further, the limiting unit is divided into multiple rows along the length direction of the buckling strips and is discontinuously distributed at different positions of the buckling strips, so that different limiting requirements of different buckling strips in the buckling strips can be achieved, and the buckling strips after limiting are divided into buckling segments with different lengths l n , and the segmented and multi-stage buckling energy dissipation function is achieved; wherein the width of the limiting plate d should be 3 d ≤min l n ≤5 d .

[0018] Further, the connecting member comprises connecting steel plates and tensioning screws, and is used for connecting the energy dissipation unit, the hinged inclined brace and the controlled structural beam.

[0019] Further, the welding strength of the buckling strips and the connecting plates is not less than the bearing strength of the steel material of the connecting plates; the grade of the tensioning screw is not less than M16; and the high-strength friction type bolt connecting the limiting plate and the controlled structural beam is not less than M10.

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

[0021] The present application has the segmented and multi-stage buckling energy dissipation function, the adjustable space and additional stiffness function, simple structure and assembly, and post-earthquake recovery function. The adjustable segmented and multi-stage composite anti-buckling energy dissipation device provided by the present application can be applied to concrete frame structures, shear wall structures, steel structures and other building structures, and can also be applied to bridge piers, tie beams and other structures, and can realize the segmented and multi-stage buckling energy dissipation and rapid recovery function under the action of earthquakes. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Axonometric view of the adjustable segmented-multilevel composite buckling-restrained energy dissipation device of the present application;

[0023] Figure 2 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0024] Figure 3 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0025] Figure 4 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0026] Figure 5 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0027] Figure 6 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0028] Figure 7 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0029] Figure 8 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0030] Figure 9 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0031] Figure 10 Axonometric view of the intermediate hinged brace of the present application; Figure 1 Axonometric view of the intermediate hinged brace of the present application;

[0032] Figure 11 Axonometric view of the intermediate hinged brace of the present application; Figure 10 Axonometric view of the intermediate hinged brace of the present application;

[0033] In the figure, 1 - hinged bracing, 2 - energy dissipation unit, 3 - limiting unit, 4 - connecting piece, A - first angle steel, B - second angle steel, 1-1 - outer cylinder, 1-2 - inner cylinder, 1-3 - mandrel, 1-4 - protruding connecting plate, 1-5 - first horizontal section steel plate, 1-6 - second horizontal section steel plate, 1-7 - threaded hole, 2-1 - buckling strip, 2-2 - connecting plate, 3-1 - limiting block, 3-2 - limiting plate, 3-3 - M20 high-strength friction type bolt, 3-4 - M10 high-strength friction type bolt, 3-5 - top plate, 3-6 - plate body, 4-1 - connecting steel plate, 4-2 - opposite pulling screw, 5 - controlled structure beam, 6 - column; 3-1-a, 3-2-a, 3-3-a, 3-4-a, 3-5-a, 3-6-a are different constraint limiting units; 2-1-i-j (i = 1, 2, 3, 4, 5, 6; j = 1, 2, 3) is the buckling strip number. DETAILED DESCRIPTION

[0034] The present application will be further described in conjunction with the accompanying drawings Figures 1-11 and specific embodiments, which facilitate a clear understanding of the present application, but they do not constitute limitations on the present application.

[0035] Example 1

[0036] As shown in the accompanying drawings Figures 1-9 , the adjustable segmented-multilevel composite buckling-restrained energy dissipation device of the present embodiment is in the shape of a "Z" as a whole, which comprises a hinged bracing 1, an energy dissipation unit 2, a limiting unit 3 and a connecting piece 4. The hinged bracing 1 is arranged in a diagonal direction, and the energy dissipation unit 2 is arranged at the opposite ends of the hinged bracing 1. The limiting unit 3 is arranged at the other end of the energy dissipation unit 2. The hinged bracing 1 and the energy dissipation unit 2 are connected to the inner side of the controlled structure beam 5 through the connecting piece 4. The limiting unit 3 is vertically connected to the inner side of the controlled structure beam 5.

[0037] As Figures 2-4As shown, the hinged diagonal brace 1 includes a first angle steel A, a second angle steel B, an outer cylinder 1-1, an inner cylinder 1-2, and a mandrel 1-3. The first angle steel A has a first horizontal section steel plate 1-5 at one end and is cut into a comb shape at the other end. The second angle steel B has a second horizontal section steel plate 1-6 at one end and is not processed at the other end. The first angle steel A and the second angle steel B are both provided with two protruding connecting plates 1-4 of the same size on the side surfaces, which are used for welding connection with buckling strips 2-1 of the energy dissipation unit 2. The second angle steel B is welded to the outer cylinder 1-1, the inner cylinder 1-2 is inserted into the outer cylinder 1-1, the end key tooth of the first angle steel A is inserted into the outer cylinder 1-1, and the inner cylinder 1-2 is welded, and the mandrel 1-3 is welded in the inner cylinder 1-2, finally forming the hinged diagonal brace 1. The top end of the first angle steel A and the bottom end of the second angle steel B are connected to the controlled structural beam 5 through the connecting steel plate 4-1 and the tensioning screw 4-2 in the connecting piece 4, thereby forming a support system. The protruding connecting plates 1-4 on the side surfaces of the first angle steel A and the second angle steel B are in opposite directions.

[0038] In this embodiment, the outer cylinder 1-1 is cut into a rectangular hole of 1 / 5 longitudinal axis length along 1 / 4 circumference and along the longitudinal axis of the cylinder, so that the comb teeth at one end of the first angle steel A can pass through the rectangular hole and be welded to the inner cylinder 1-2. The inner cylinder 1-2 is welded by three short cylinders through short steel sheets, and the positions of the short cylinders on the inner cylinder 1-2 correspond to the positions of the rectangular holes of the outer cylinder 1-1. The comb teeth of the first angle steel A are welded to the three short cylinders respectively. The cross-sectional shape of the mandrel 1-3 is cross-shaped, and the mandrel 1-3 functions to fix the positions of the outer cylinder 1-1 and the inner cylinder 1-2, so that they can rotate around themselves. This structure can make the hinged diagonal brace 1 rotate around the mandrel 1-3 in one direction, and realize the function of selecting additional stiffness in two directions. The steel plate of the mandrel 1-3 is relatively thin, and screw holes 1-7 are reserved on the bottom 1-5 of the first angle steel A and the top 1-6 of the second angle steel B.

[0039] As shown in Figures 5-6 The energy dissipation unit 2 includes buckling strips 2-1 and connecting plates 2-2. The connecting plates 2-2 are arranged outside the first horizontal section steel plate 1-5, and the connecting steel plate 4-1 is arranged outside the connecting plates 2-2. The buckling strips 2-1 are divided into 6 layers in the vertical direction (i=1, 2, 3, …, 6) and 3 columns in the horizontal direction (j=1, 2, 3). The buckling strips are numbered as 2-1-i-j (i=1, 2, 3, 4, 5, 6; j=1, 2, 3). Specifically, one end of the top and bottom buckling strips 2-1 is welded to the side surface of the connecting plate 2-2, and the other end is connected to the limiting unit 3. One end of the middle part of the buckling strip 2-1 is welded to the protruding connecting plate 1-4 on the side surface of the first angle steel A and the second angle steel B, and the other end is connected to the limiting unit 3. In actual use, the energy dissipation device can be segmented and multi-stage energy dissipation by restraining and releasing any level of limiting unit.

[0040] As shown in Figures 7-9 The limiting unit 3 includes a limiting block 3-1 and a limiting plate 3-2. The limiting block 3-1 is welded to the buckling strip 2-1. The limiting plate 3-2 includes a top plate 3-5 and a plate body 3-6. The cross section of the limiting plate 3-2 is T-shaped, and the width is d. The top plate 3-5 at the end of the limiting plate 3-2 is connected to the controlled structural beam 5 through a high-strength friction bolt 3-3. The M20 high-strength friction bolt 3-3 is reserved in the controlled structural beam 5. The plate body 3-6 is connected to the limiting block 3-1 through an M10 high-strength friction bolt 3-4, and a nut is installed at the bottom of the top plate 3-5 of the limiting plate 3-2.

[0041] The connecting piece 4 includes a connecting steel plate 4-1 and a tension screw 4-2, which is used to connect the energy dissipation unit 2, the hinged diagonal brace 1 and the controlled structural beam 5. Specifically, the top of the first angle steel A, the bottom of the second angle steel B, the connecting plate 2-2 at one end of the energy dissipation unit 2, the connecting steel plate 4-1 is connected to the controlled structural beam 5 through the tension screw 4-2, and the tension screw 4-2 is embedded in the controlled structural beam 5. A nut is installed at the bottom of the first horizontal segment steel plate 1-5 of the first angle steel A and at the top of the second horizontal segment steel plate 1-6 of the second angle steel B.

[0042] In this embodiment, the weld strength of the buckling strip 2-1 and the connecting plate 2-2 is not less than the pressure strength of the steel material of the connecting plate 2-2. The grade of the tension screw 4-2 is not less than M16. The high-strength friction bolt for connecting the limiting plate 3-2 and the controlled structural beam 5 is M20. Specifically, the materials of the hinged diagonal brace 1, the connecting steel plate 4-1 and the connecting plate 2-2 are Q235 grade steel. The materials of the limiting block 3-1 and the limiting plate 3-2 are Q460 grade steel. The material of the buckling strip 2-1 is soft steel.

[0043] In this embodiment, the limiting unit 3 is divided into multiple rows along the length direction of the buckling strip 2-1 and is distributed discontinuously at different positions of the buckling strip 2-1, which can realize different limiting requirements of different buckling strips in the buckling strip 2-1. After limiting, the buckling strip 2-1 is divided into buckling segments with different lengths l n and sizes, thereby realizing the functions of segmented and multi-stage buckling energy dissipation. The width of the limiting plate 3-2 d should satisfy 3 d ≤min l n ≤5 d In this embodiment, the upper and lower limiting plates 3-2 are both 3 rows, of which 1 row is arranged at the middle position of the buckling strip 2-1, and the other 2 rows are arranged at the end of the buckling strip 2-1.

[0044] Embodiment 2

[0045] As shown in Figures 10-11As shown, it is a kind of energy dissipation combination mode of energy dissipation device, and the limiting plates 3-2 in upper and lower positions are all 3 rows, and are all arranged in alignment at the end of the buckling strip 2-1.The other structures are the same as those in example 1.

[0046] The constraint limiting units 3-1-a, 3-2-a, 3-3-a, 3-4-a, 3-5-a and 3-6-a realize multi-stage energy dissipation of the energy dissipation device through the following three steps under the action of earthquake:

[0047] Under the action of earthquake, the buckling strip 2-1-1 or the buckling strip 2-1-4 first occurs elastic-plastic deformation, at this time, it is the first stage energy dissipation, and the angular displacement Δμ1 at position r is less than .

[0048] The buckling strip 2-1-1 or the buckling strip 2-1-4 yields, the angular displacement Δμ1 is equal to , the buckling strip 2-1-2 or the buckling strip 2-1-5 occurs elastic-plastic deformation, enters the second stage energy dissipation, at this time, the angular displacement Δμ2 at position s is less than .

[0049] The buckling strip 2-1-2 or the buckling strip 2-1-5 yields, the angular displacement Δμ ２ = , the buckling strip 2-1-3 or the buckling strip 2-1-6 occurs elastic-plastic deformation, enters the third stage energy dissipation, at this time, the angular displacement Δμ ３ < , and < < .

[0050] The above is only the preferred embodiment of the present application, and does not limit the structure of the present application in any form. The arrangement type and the use quantity of the present application are not limited to the example, and can be optimized and selected according to the engineering practice. Any modification, equivalent change and decoration of the above embodiment according to the technical principle of the present application, which does not deviate from the technical scheme of the present application, is still within the scope of the technical scheme of the present application.

Claims

1. An adjustable segmented-multilevel composite buckling-restrained energy dissipation device, characterized in that: the buckling-restrained energy dissipation device is overall in a "Z" shape, comprising a hinged diagonal brace (1), an energy dissipation unit (2), a limiting unit (3), and a connecting piece (4); the hinged diagonal brace (1) is diagonally arranged, and the two ends of the hinged diagonal brace (1) are oppositely provided with the energy dissipation unit (2); the other end of the energy dissipation unit (2) is provided with the limiting unit (3); the hinged diagonal brace (1) and the energy dissipation unit (2) are connected to the inner side of a controlled structural beam (5) through the connecting piece (4); and the limiting unit (3) is vertically connected to the inner side of the controlled structural beam (5). The hinged diagonal brace (1) comprises a first angle steel (A), a second angle steel (B), an outer cylinder (1-1), an inner cylinder (1-2), and a core shaft (1-3). The first angle steel (A) has a first horizontal segment steel plate (1-5) at one end and is cut into a comb shape at the other end; the second angle steel (B) has a second horizontal segment steel plate (1-6) at one end and is not processed at the other end; the side surfaces of the first angle steel (A) and the second angle steel (B) are provided with protruding connecting plates (1-4) of the same size for welding connection with buckling strips (2-1) of the energy dissipation unit (2); the second angle steel (B) is welded to the outer cylinder (1-1); the inner cylinder (1-2) is inserted into the outer cylinder (1-1); the end key teeth of the first angle steel (A) are inserted into the outer cylinder (1-1) and welded to the inner cylinder (1-2); and the core shaft (1-3) is welded in the inner cylinder (1-2), thereby forming the hinged diagonal brace (1). The top end of the first angle steel (A) and the bottom end of the second angle steel (B) are connected to the controlled structural beam (5) through a connecting steel plate (4-1) and a tension rod (4-2) in the connecting piece (4), thereby forming a support system. The protruding connecting plates (1-4) on the side surfaces of the first angle steel (A) and the second angle steel (B) are in opposite directions.

2. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 1, characterized in that: The outer cylinder (1-1) is provided with rectangular holes of the same size at intervals, so that the comb teeth at one end of the first angle steel (A) can pass through the rectangular holes and be welded to the inner cylinder (1-2).

3. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 2, characterized in that: The inner cylinder (1-2) is welded by three short cylinders through short steel sheets, and the positions of the short cylinders on the inner cylinder (1-2) correspond to the positions of the rectangular holes of the outer cylinder (1-1); the core shaft (1-3) has a cross shape in cross section, and the core shaft (1-3) is used to fix the positions of the outer cylinder (1-1) and the inner cylinder (1-2) so that the two can rotate around themselves, thereby enabling the hinged diagonal brace (1) to rotate in one direction around the core shaft (1-3) and realizing the function of selectable additional stiffness in two directions.

4. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 3, characterized in that: ​ 5. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 4, characterized in that: The energy dissipation unit (2) comprises buckling strips (2-1) and connecting plates (2-2); the connecting plates (2-2) are arranged outside the first horizontal section steel plates (1-5), and connecting steel plates (4-1) are arranged outside the connecting plates (2-2); the buckling strips (2-1) are divided into i layers (i = 1, 2, 3, …, m) in the vertical direction and j columns (j = 1, 2, 3, …, n) in the horizontal direction; one end of the buckling strips (2-1) at the top and the bottom is welded to the side surface of the connecting plate (2-2), and the other end is connected to the limiting unit (3); one end of the buckling strips (2-1) in the middle part is welded to the protruding connecting plates (1-4) on the side surfaces of the first angle steel (A) and the second angle steel (B), and the other end is connected to the limiting unit (3); in actual use, the energy dissipation device can be segmented and multi-stage energy dissipated by restraining and releasing any level of limiting unit.

6. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 5, characterized in that: The limiting unit (3) comprises limiting blocks (3-1) and limiting plates (3-2); the limiting blocks (3-1) are welded to the buckling strips (2-1); the limiting plates (3-2) comprise top plates (3-5) and plate bodies (3-6), the cross section of the limiting plate (3-2) is T-shaped, the width is d, the top plate (3-5) at the end of the limiting plate (3-2) is connected to the controlled structural beam (5) through a high-strength friction type bolt, the high-strength friction type bolt is reserved in the controlled structural beam (5), and the plate body (3-6) is connected to the limiting block (3-1) through a high-strength friction type bolt.

7. The adjustable segmental-multiple-stage composite type buckling-restrained energy dissipation device according to claim 6, characterized in that: The limiting unit (3) is divided into multiple rows along the length direction of the buckling strip (2-1) and is discontinuously distributed at different positions of the buckling strip (2-1) in sequence, so that different limiting requirements of different buckling strips in the buckling strip (2-1) can be achieved, and the buckling strip (2-1) is divided into multiple segments with different lengths l n after being limited, and different buckling segments with different sizes are formed, so that the segmented and multi-stage buckling energy dissipation function is realized; wherein the width of the limiting plate (3-2) should satisfy d should be greater than or equal to 3 d and less than or equal to min l n and less than or equal to 5 d .

8. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 7, characterized in that: The connecting piece (4) comprises connecting steel plates (4-1) and tension rods (4-2) for connecting the energy dissipation unit (2), the hinged inclined brace (1) and the controlled structural beam (5).

9. The adjustable segmental-multi-stage composite type buckling-restrained energy dissipation device according to claim 8, characterized in that: The weld strength of the buckling strips (2-1) and the connecting plates (2-2) is not less than the pressure-bearing strength of the steel material of the connecting plates (2-2); the grade of the tension rod (4-2) is not less than M16; and the high-strength friction type bolt for connecting the limiting plate (3-2) and the controlled structural beam (5) is not less than M10.

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