CN108547392B - Four-steel-pipe-constrained sectional type buckling-restrained brace with replaceable cross-shaped inner core - Google Patents
Four-steel-pipe-constrained sectional type buckling-restrained brace with replaceable cross-shaped inner core Download PDFInfo
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- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
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- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
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Abstract
The invention relates to a four-steel-pipe constraint sectional type buckling-restrained brace with a replaceable cross-shaped inner core, and belongs to the field of structural engineering. The buckling-restrained brace is composed of 2 side-section cross core members, n middle-section cross core members, 2 side-section peripheral restraining devices with flanges, n-1 middle-section peripheral restraining devices with flanges, 4(n +1) core outer side connecting cover plates, a first high-strength bolt group and a second high-strength bolt group. Based on the component sectional assembly type design concept, the ultra-long and ultra-heavy type buckling restrained brace is divided into a plurality of sections, and a great deal of inconvenience in the processes of processing, transporting and installing is overcome. Through setting up the tight transmission axial force in kernel outside connection cover plate and the segmentation top of kernel component, realize plasticity damage control through set up the weakening zone on the kernel component, only need dismantle high strength bolt crowd and kernel outside connection cover plate can take out the kernel component from changing after the shake, overcome the drawback that the kernel component can't be changed after destroying to the support of wholly constraining type buckling restrained.
Description
Technical Field
The patent relates to a four steel pipe restraint sectional type buckling restrained brace of removable cross kernel belongs to structural engineering technical field.
Background
The buckling-restrained brace consists of an inner core component and a peripheral restraining component, wherein the inner core component bears axial pressure, and the peripheral component restrains the transverse displacement of the inner core component, so that the inner core component can generate full-section yielding under the action of axial pressure. Since the 90 s ' earthquake of Osaka and North Ridge in America in the past century, a great deal of engineering practice has been carried out in developed countries such as America and Japan, and the buckling restrained brace becomes one of the best energy dissipation and shock absorption members due to the combination of the ' support function in normal use state and small earthquake ' and the ' energy dissipation function under large earthquake ' and is rapidly popularized and applied in recent years.
At present, in an integrally constrained buckling-restrained brace adopted in engineering, an inner core component of the integrally constrained buckling-restrained brace generally adopts a linear component, a cross component or an I-shaped component, a peripheral constrained component adopts a concrete peripheral constrained component, a steel pipe concrete peripheral constrained component or an all-steel peripheral constrained component, and a certain gap is left between the surface of the inner core component and the surface of the peripheral constrained component to prevent the inner core component from being blocked due to transverse expansion when the inner core component is pressed. Under the normal use state and the action of small shock, the inner core component of the buckling-restrained brace is stressed to keep an elastic state and provides enough rigidity for the main body framework; when a large earthquake occurs, the inner core component firstly goes into yielding, a large amount of earthquake energy is consumed, and the main body frame is protected.
However, the ultra-long and ultra-heavy buckling restrained brace used in some large buildings has many inconveniences in the links of processing, transportation, installation and the like due to the long and heavy components, and a large part of capital is used for the aspect of heavy machinery transportation and hoisting; in addition, in case the installation is accomplished can't dismantle promptly, even take place local damage and also can only the whole change after the earthquake takes place, cause building material's serious waste, be not conform to the connotation of advocating green building now.
Based on the structure, the invention provides a four-steel-pipe constraint sectional type buckling restrained brace with a replaceable cross-shaped inner core, which overcomes the defects that the traditional overlong and overweight type buckling restrained brace is inconvenient in the processes of processing, transporting and installing and cannot be repaired after an earthquake. The buckling-restrained brace comprises 2 side-section cross core members, n middle-section cross core members, 2 side-section peripheral restraining devices with flanges, n-1 middle-section peripheral restraining devices with flanges, 4(n +1) core outer side connecting cover plates, a first high-strength bolt group and a second high-strength bolt group, wherein n is a positive integer. The buckling-restrained brace provided by the invention transmits axial tension through the connecting cover plate outside the inner core and the first high-strength bolt group, the plastic development area of each section of the cross-shaped inner core member is controlled by arranging dog bone weakening or slotting weakening on the cross-shaped inner core member, and the peripheral restraining device still plays a role in preventing buckling instability of the cross-shaped inner core member. After the earthquake, the damaged cross-shaped core component can be pulled out from the peripheral restraining device of the corresponding section and replaced only by disassembling the connecting cover plate outside the core, the first high-strength bolt group and the second high-strength bolt group, the repair work after the earthquake is simple and quick, the material waste caused by replacement of the buckling-restrained brace due to local damage of the core is avoided, the buckling-restrained brace after the replacement of the core component can still be continuously used, and the repair requirement after the earthquake is met.
In addition, the first high-strength bolt group used for connection has a force transmission effect and a limiting effect, when the cross-shaped inner core members are pulled, the first high-strength bolt group transmits the pulling force on each cross-shaped inner core member to the corresponding inner core outer side connecting cover plate, meanwhile, the first high-strength bolt group limits the sliding of the peripheral restraining device, and at the moment, the peripheral restraining device does not participate in the stress. When the cross-shaped inner core component is pressed, the first high-strength bolt group limits the peripheral restraining device to slide, the peripheral restraining device is in a bending state, and buckling instability of each section of the inner core component is restrained.
The invention can realize reasonable segmentation of the long and heavy integrally-restrained buckling restrained brace and replacement and repair of the inner core component by reasonably arranging the common plates, and a limiting device of a peripheral restraining component is not required to be additionally arranged; the invention has the advantages of exquisite integral structure and reasonable force transmission, is particularly suitable for large buildings in areas with higher earthquake fortification intensity, ensures the bearing and energy consumption of the lateral force resisting component of the heavy structure, solves the problems of high transportation cost, incapability of repairing after earthquake and the like, reduces the cost, and improves the efficiency and the time efficiency.
Disclosure of Invention
The invention provides a four-steel-pipe constraint sectional type buckling-restrained brace with a replaceable cross-shaped core, and aims to solve the problems that the existing ultralong and ultraheavy buckling-restrained brace is inconvenient in the processes of processing, transporting and installing and cannot be repaired after an earthquake, reduce the cost, improve the efficiency and the timeliness and provide more selection ranges for the form of the heavy buckling-restrained brace.
In order to achieve the purpose, the invention adopts the following technical means:
The utility model provides a four steel pipe restraint sectional type buckling restrained brace of removable cross kernel which characterized in that: the buckling-restrained brace consists of 2 side-section cross-shaped core members, n middle-section cross-shaped core members, 2 side-section peripheral restraining devices with flanges, n-1 middle-section peripheral restraining devices with flanges, 4(n +1) core outer side connecting cover plates, a first high-strength bolt group and a second high-strength bolt group, wherein n is a positive integer; the buckling restrained brace overcomes the defects that the traditional overlong and overweight buckling restrained brace is inconvenient in the processes of processing, transporting and installing and the core component of the whole restrained buckling restrained brace cannot be replaced after being damaged; based on a component sectional assembly type design concept, axial pressure is transmitted by mutually jacking each section of core components, axial tension is transmitted by connecting a cover plate and a first high-strength bolt group outside the core, the plastic development area of each section of core components is controlled by arranging dog bone weakening or slotting weakening on the core components, and the peripheral restraining device still achieves the purpose of preventing buckling instability of the core components; after the earthquake, the damaged core component can be pulled out from the peripheral restraining device of the corresponding section and replaced only by disassembling the connecting cover plate at the outer side of the core, the first high-strength bolt group and the second high-strength bolt group, so that the material waste caused by replacing the buckling-restrained brace due to the local damage of the core component is avoided, the buckling-restrained brace after replacing the core component can still be continuously used, and the function recovery requirement after the earthquake is met; the peripheral constraint device is formed by welding four steel pipe constraint members, a flange plate and a plurality of batten plates in a factory, and a 1-2mm gap is left between the steel pipe constraint members and the surface of the cross-shaped inner core member or is filled with rubber; the n + 2-section cross-shaped inner core component needs to penetrate through the peripheral restraining device of the corresponding section when being installed, the end part of the n + 2-section cross-shaped inner core component is tightly propped, and then the n + 2-section cross-shaped inner core component and the n + 1-section peripheral restraining device are connected into a whole through the connecting cover plate, the first high-strength bolt group and the second high-strength bolt group on the outer side of the inner core.
The side section cross-shaped inner core component is characterized in that the whole length of the single core component is divided into three areas: an end reinforcing area for avoiding the bending damage of the end part of the core component in the side section of the anti-bending support; the middle weakening area, namely the plastic development area of the inner core member, is controlled in a dog bone weakening or grooving weakening mode, the weakening width is more than twice of the diameter of the hole of the high-strength bolt, the weakening area is filled with rubber materials or is not filled with the rubber materials, the tensile bearing capacity of the section of the area is ensured to be weaker than that of the other two areas, and therefore the plastic damage is controlled in the area; and the end part is provided with an opening connecting area which is used for connecting the connecting cover plate and the peripheral restraining device on the outer side of the inner core, transmitting axial tension through the first high-strength bolt group and limiting the sliding of the peripheral restraining device.
The whole length of the middle section cross-shaped core component is respectively an end part perforated connection area, a middle weakening area and an end part perforated connection area, the arrangement mode of each area is the same as that of the corresponding area of the side section cross-shaped core component, and the end part reinforcing area is not arranged.
The periphery of the flange plate is provided with holes and is welded at the end parts of the four steel pipes in a factory; the outer side connecting cover plate of the inner core and the peripheral restraining devices of all the sections are provided with holes at positions corresponding to the hole connecting areas at the end parts of the cross-shaped inner core members of the corresponding sections, and the outer side connecting cover plate of the inner core, the peripheral restraining devices and the cross-shaped inner core members are connected into a whole by installing the first high-strength bolt group and the second high-strength bolt group.
The yield strength of the plate of the core outer side connecting cover plate is higher than that of the cross-shaped core component, and the total tensile bearing capacity of the 4 core outer side connecting cover plates is two times higher than that of a weakened area in the middle of the cross-shaped core component; the first high-strength bolt group has a force transmission function and a limiting function, when the cross-shaped inner core component is pulled, the first high-strength bolt group transmits the pulling force on the cross-shaped inner core component to the connecting cover plate on the outer side of the inner core, and simultaneously limits the sliding of the peripheral restraining device, and the peripheral restraining device does not participate in the stress; when the cross-shaped inner core component is pressed, the first high-strength bolt group limits the peripheral restraining device to slide, the peripheral restraining device is in a bending state, and buckling instability of each section of the cross-shaped inner core component is restrained.
The flange plate is a rectangular plate with holes or other forms of plate with holes.
The advantages of the patent are shown in the following aspects:
(1) And segmenting the ultra-long and ultra-heavy component. The buckling restrained brace is characterized in that the buckling restrained brace is composed of a plurality of buckling restrained braces, a plurality of buckling restrained.
(2) The core component can be replaced in sections after the earthquake. The inner core component is tightly propped to transmit axial pressure, the outer side of the inner core is connected with the cover plate and the first high-strength bolt group to transmit axial tension, and the dog bone weakening or slotting weakening is arranged on the inner core component to control the plasticity development area of the inner core component. The buckling-restrained brace can be divided into a plurality of sections after an earthquake only by disassembling the first high-strength bolt group, the second high-strength bolt group and the connecting cover plate outside the inner core while meeting basic bearing and energy consumption, the damaged inner core component can be pulled out from the peripheral restraining component of the corresponding section for replacement, material waste caused by replacement of the buckling-restrained brace due to local damage of the inner core component is avoided, and the buckling-restrained brace after replacement of the inner core component can still be continuously used. The invention overcomes the defect that a peripheral restraint device needs to be disassembled when the kernel of the traditional assembled buckling-restrained brace is replaced, meets the requirement of function recovery after an earthquake, and improves the efficiency and the time efficiency. In addition, the member segmentation assembly type concept is applied to the integral constraint type buckling restrained brace, so that the inner core member and the peripheral constraint member are both in segmentation assembly type, and the inner core member can be replaced and repaired after the earthquake, and the method is initiated in the field.
(3) The force transmission is reasonable and the stress is ingenious. When the inner core member is pulled, the first high-strength bolt group transmits the pulling force on the inner core member to the connecting cover plate on the outer side of the inner core, and simultaneously, the peripheral restraining member is limited from sliding, and at the moment, the peripheral restraining member does not participate in stress. When the inner core component is pressed, the first high-strength bolt group limits the peripheral restraining component to slide, the peripheral restraining component is in a bending state, and buckling instability of each section of the inner core component is restrained.
(4) The structure is exquisite, and a component is multipurpose. The invention has simple structure, all super-long and super-heavy components can be prefabricated in sections in a factory, and the assembly is implemented through bolts, so the processing precision is high, and no excessively complicated construction process is generated. The first high-strength bolt group used for connecting each component in the device also plays a role in force transmission and limiting, and a limiting device of a peripheral restraining component is not required to be additionally arranged.
Drawings
FIG. 1 is a three-dimensional view of a four-steel-pipe constraint sectional type buckling-restrained brace with a replaceable cross-shaped inner core;
FIG. 2 is a disassembled view of a four-steel-pipe-constrained sectional type buckling-restrained brace with a replaceable cross-shaped inner core;
FIG. 3 is a front view of a four-steel-pipe-constrained segmented buckling restrained brace with a replaceable cross-shaped inner core;
FIG. 4 is a side view of a four-steel-pipe-constrained segmented buckling restrained brace with a replaceable cross-shaped inner core;
FIG. 5 is a top view of a four-steel-pipe constraint segmented buckling restrained brace with a replaceable cross-shaped inner core;
FIG. 6 is a perspective view of a peripheral restraining device unit of a four-steel-tube restraining sectional type buckling restrained brace with a replaceable cross-shaped inner core;
FIG. 7 is a schematic view of inner core component regions of a four-steel-pipe-constrained segmented buckling-restrained brace with a replaceable cross-shaped inner core;
FIG. 8 is a schematic diagram of weakening type of an inner core component of a four-steel-tube-constrained segmented buckling restrained brace with a replaceable cross-shaped inner core: (a) is in dog bone weakened form and is not filled; (b) in the dog bone weakened form, and rubber filled; (c) in the form of a slotted weakening.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to fig. 1 to 8.
As shown in fig. 1 to 8, a four-steel-tube-constrained segmented buckling restrained brace with a replaceable cross-shaped inner core comprises the following components:
1-side section cross-shaped inner core component;
2-middle cross-shaped inner core component;
3-steel tube restraining member;
4-batten plate;
5-flange plate;
6, connecting a cover plate at the outer side of the inner core;
7-first high-strength bolt group;
8-a second high-strength bolt group;
9-edge section peripheral restraint device unit;
10-middle section peripheral restraining device unit;
11-end reinforcing area of the side section cross-shaped inner core component;
12-the middle weakening area of the cross-shaped core component at the edge section;
13-the end of the cross-shaped core component of the side section is provided with a hole connecting area;
14-a central weakened area of the cross-shaped core member at the middle section;
15-the end of the cross-shaped core member in the middle section is provided with a hole connection region;
16-dog bone weakening;
17-grooving weakening;
18-rubber material filling.
As shown in fig. 1-8, a four-steel-pipe-constrained segmented buckling-restrained brace with a replaceable cross-shaped core comprises 2 side-segment cross-shaped core members (1), n middle-segment cross-shaped core members (2), n +1 peripheral constraining device units (9, 10) consisting of steel pipe constraining members (3), batten plates (4) and flange plates (5), 4n +4 core outer side connecting cover plates (6), a first high-strength bolt group (7) and a second high-strength bolt group (8). During installation, every four steel pipe constraint members (3), a side section peripheral constraint device unit (9) is formed by a plurality of batten plates (4) and a flange plate (5), every four steel pipe constraint members (3), a middle section peripheral constraint device unit (10) is formed by a plurality of batten plates (4) and two flange plates (5), a plurality of units are formed according to actual requirements, then the cross-shaped core members (1 and 2) penetrate through the corresponding section peripheral constraint device units (9 and 10), the end portion is tightly pressed, finally, the cover plate (6) is connected through the outer side of the core, the first high-strength bolt group (7) and the second high-strength bolt group (8) connect the cross-shaped core members (1 and 2) and the peripheral constraint device units (9 and 10) into a whole, and the buckling-preventing support is formed.
The side-section cross-shaped core component (1) is divided into three areas, as shown in fig. 7, which are an end reinforcing area (11) of the side-section cross-shaped core component, a middle weakening area (12) of the side-section cross-shaped core component and an end hole connecting area (13) of the side-section cross-shaped core component. The end reinforcing area (11) of the side section cross-shaped inner core component can be reinforced by a conventional method and is formed by widening the inner core component; the middle weakening area (12) of the side-section cross-shaped core component is controlled in a dog-bone weakening (16) or grooving weakening (17) mode, the weakening width is larger than twice of the diameter of the hole of the high-strength bolt, the weakening area is filled with rubber materials (18) or is not filled, and the tensile bearing capacity of the section of the area is guaranteed to be weaker than that of the other two areas. The cross kernel component of interlude (2) divide into two regions, are the tip trompil union coupling region (15) of the cross kernel component of interlude respectively, the middle part of the cross kernel component of interlude cuts weak area (14) and the tip trompil union coupling region (15) of the cross kernel component of interlude, and each regional mode of setting is the same with the cross kernel component of limit section correspondence region, and does not establish the tip reinforcing area. The present example provides a central weakened area (12, 14) in the form of dog bone weakening (16), the weakened area not being filled; end part open hole connecting areas (13, 15) are used for connecting the inner core outer side connecting cover plate (6) and the peripheral restraining device units (9, 10) and ensuring the force transmission and limiting functions of the first high-strength bolt group (7).
During specific assembly, the steel pipe constraint component (3), the batten plate (4) and the flange plate (5) are welded into peripheral constraint device units (9 and 10), a plurality of units are formed according to actual requirements, then the cross-shaped core components (1 and 2) penetrate into the peripheral constraint device units (9 and 10) respectively, the end portions of the cross-shaped core components are tightly pressed, and finally the cross-shaped core components (1 and 2), the core outer side connecting cover plate (6) and the peripheral constraint device units (9 and 10) are connected into a whole through the first high-strength bolt group (7) and the second high-strength bolt group (8).
In the embodiment, n is 2 as an explanation, that is, the embodiment adopts 2 edge-section cross-shaped inner core members (1), 2 middle-section cross-shaped inner core members (2), 2 edge-section peripheral constraint device units (9) and 1 middle-section peripheral constraint device unit (10); in addition, the present invention is not limited to the examples, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (2)
1. The utility model provides a four steel pipe restraint sectional type buckling restrained brace of removable cross kernel which characterized in that: the buckling-restrained brace consists of 2 side-section cross-shaped core members, n middle-section cross-shaped core members, 2 side-section peripheral restraining devices with flanges, n-1 middle-section peripheral restraining devices with flanges, 4 (n + 1) core outer side connecting cover plates, a high-strength bolt group 1 and a high-strength bolt group 2, wherein n is a positive integer; the buckling restrained brace can effectively overcome the defects that the traditional overlong and overweight buckling restrained brace is inconvenient in the processes of processing, transporting and installing and the core component of the whole restrained buckling restrained brace cannot be replaced after being damaged; after the earthquake, the damaged core component can be pulled out from the peripheral restraining device of the corresponding section and replaced only by disassembling the connecting cover plate at the outer side of the core, the high-strength bolt group 1 and the high-strength bolt group 2, meanwhile, the material waste caused by replacing the buckling-restrained brace due to the local damage of the core component can be avoided, and the buckling-restrained brace after replacing the core component can still be continuously used, so that the function recovery requirement after the earthquake is met; the side section cross-shaped inner core component is characterized in that the whole length of the single core component is divided into three areas: an end reinforcing area for avoiding the bending damage of the end part of the core component in the side section of the anti-bending support; the middle weakening area, namely the plastic development area of the inner core member, is artificially controlled in a dog bone weakening or slotting weakening mode, the weakening width is more than twice of the diameter of the hole of the high-strength bolt, and the weakening area is filled with a hard rubber material or is not filled with the hard rubber material, so that the tensile bearing capacity of the section of the area is ensured to be weaker than that of the other two areas, and the plastic damage is controlled in the area; the end part is provided with a hole connecting area which is used for connecting the connecting cover plate and the peripheral restraining device on the outer side of the inner core, effectively transmitting axial tension through the high-strength bolt group 1 and limiting the sliding of the peripheral restraining device; the whole length of the middle section cross-shaped core component is respectively an end part perforated connection area, a middle weakening area and an end part perforated connection area, the arrangement mode of each area is the same as that of the corresponding area of the side section cross-shaped core component, and the end part reinforcing area is not arranged; the peripheral constraint device is formed by welding four steel pipe constraint members, a flange plate and a plurality of batten plates in a factory, and a 1-2mm gap is left between the steel pipe constraint members and the surface of the cross-shaped inner core member or is filled with rubber; the n + 2-section cross-shaped inner core component needs to penetrate through the peripheral constraint device of the corresponding section when being installed, the end part of the n + 2-section cross-shaped inner core component is tightly propped, and then the n + 2-section cross-shaped inner core component and the n + 1-section peripheral constraint device are connected into a whole through the cover plate, the high-strength bolt group 1 and the high-strength bolt group 2 which are connected to the outer side of the inner core; the periphery of the flange plate is provided with holes and is welded at the end parts of the four steel pipes in a factory; the outer side connecting cover plate of the inner core is arranged on the outer side of the peripheral restraint device, the plate is made of a material higher than that of the cross-shaped inner core component, and the total tensile bearing capacity of the outer side connecting cover plates of the 4 inner cores is two times higher than that of a weakened area in the middle of the cross-shaped inner core component; the high-strength bolt group 1 mainly has a force transmission function and a limiting function, when the cross-shaped inner core component is pulled, the high-strength bolt group 1 transmits the pulling force on the cross-shaped inner core component to the connecting cover plate on the outer side of the inner core, and simultaneously limits the sliding of the peripheral restraining device, and the peripheral restraining device does not participate in the stress; when the cross-shaped inner core component is pressed, the high-strength bolt group 1 limits the peripheral restraining device to slide, the peripheral restraining device is in a bending state, and buckling instability of each section of the cross-shaped inner core component is effectively restrained.
2. The four-steel-tube-constrained segmented buckling restrained brace with the replaceable cross-shaped inner core as claimed in claim 1, wherein: the flange plate is a rectangular plate with holes or other forms of plate with holes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499470.5A CN108547392B (en) | 2018-05-23 | 2018-05-23 | Four-steel-pipe-constrained sectional type buckling-restrained brace with replaceable cross-shaped inner core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499470.5A CN108547392B (en) | 2018-05-23 | 2018-05-23 | Four-steel-pipe-constrained sectional type buckling-restrained brace with replaceable cross-shaped inner core |
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| Publication Number | Publication Date |
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| CN108547392A CN108547392A (en) | 2018-09-18 |
| CN108547392B true CN108547392B (en) | 2020-07-17 |
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| CN201810499470.5A Active CN108547392B (en) | 2018-05-23 | 2018-05-23 | Four-steel-pipe-constrained sectional type buckling-restrained brace with replaceable cross-shaped inner core |
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| CN109505363B (en) * | 2018-11-21 | 2024-04-02 | 大连大学 | Assembled buckling restrained brace |
| CN111706141A (en) * | 2020-06-05 | 2020-09-25 | 重庆大学 | Full-assembly three-section type buckling-restrained energy-dissipation brace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6826874B2 (en) * | 1999-06-30 | 2004-12-07 | Nippon Steel Corporation | Buckling restrained braces and damping steel structures |
| CN201933637U (en) * | 2010-10-15 | 2011-08-17 | 清华大学 | Anti-flexure support member formed by binding four square torque tubes |
| CN202519808U (en) * | 2012-03-02 | 2012-11-07 | 北京工业大学 | Multi-segment connected overlong-scale anti-buckling supporter |
| CN103711224B (en) * | 2013-12-30 | 2016-07-27 | 北京工业大学 | A kind of four steel pipe external application batten plate formula cross variable-cross-sectisteel steel core displacement-limited with dissipation curvature-prevention support components |
| CN206309097U (en) * | 2016-12-15 | 2017-07-07 | 广州华森建筑与工程设计顾问有限公司 | The replaceable assembled buckling restrained brace of section is surrendered after one kind shake |
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