An assembled buckling-restrained damping wall structure and its construction method

Abstract

The present invention discloses an assembled buckling-restrained energy dissipation wall structure and its construction method, belonging to the technical field of structural engineering; it includes a damping wall body, an edge frame and a first connecting bolt; the damping wall body includes an inner core steel plate, a T-shaped fish tail plate, a buckling-restrained component, a rubber layer and a second connecting bolt; a rubber layer is arranged between the inner core steel plate and the buckling-restrained component, and between the edge frame and the buckling-restrained component, which plays a multi-functional role of providing stiffness in the elastic stage of minor earthquakes, dissipating energy in the elastoplastic stage of moderate earthquakes, and further providing stiffness in the plastic stage of major earthquakes; at the same time, by setting the buckling-restrained component, it can avoid bearing excessive shear force and failure, and can also play a sufficient anchoring role; the present invention combines the lateral force resistance function of a common shear wall, and can be used as a damping wall in the structural system to play an energy dissipation and shock absorption role. The proposed damping wall has a high degree of prefabrication, is convenient for transportation and installation, and the component performance is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of structural engineering, and particularly to a prefabricated buckling-restrained damper wall structure and a construction method thereof. Background Art

[0002] China is a country with frequent earthquakes. According to statistics, earthquakes above magnitude 7 in China account for 1 / 3 of the earthquakes above magnitude 7 on the global continent, and the number of earthquake deaths accounts for 1 / 2 of the global total; 41% of China's territory and more than half of its cities are located in areas with a basic seismic intensity of 7 degrees or above. The "Regulations on the Administration of Earthquake Resistance of Construction Projects" promulgated by the State Council in 2021 stipulates that: "Newly built schools, kindergartens, hospitals, nursing homes, children's welfare institutions, emergency command centers, emergency shelters, radio and television and other buildings located in high-intensity seismic fortification areas and key earthquake monitoring and defense areas shall adopt seismic isolation and damping and other technologies in accordance with relevant national regulations to ensure that they can meet the normal use requirements when an earthquake of the fortification intensity of this region occurs." Therefore, damping components have been promoted and applied to a certain extent in structures to improve the seismic performance of the structural system. As a high-performance energy-dissipating component, buckling-restrained braces have been promoted and applied to a certain extent in engineering. By using a restraint component to restrain the out-of-plane buckling deformation of the intermediate steel core component, stable and full hysteretic performance can be obtained. However, due to the relatively small core area of the steel component in the traditional buckling-restrained brace, its lateral stiffness is limited. When applied in high-rise buildings, it will significantly increase the cross-sectional area of the buckling-restrained brace. The excessive cross-sectional area of the brace will cause the brace to be exposed or require a relatively thick wall to decorate the brace, thereby reducing the usable area of the structure; at the same time, the brace is usually connected to the beam-column joints. At this time, the presence of the brace will limit the opening of doors, windows and openings in the structure, thereby affecting the use function of the structure. In addition, the existing buckling-restrained braces are usually designed in two stages. The elastic stage is used to improve the lateral stiffness of the structure, and the brace yields in the elastoplastic stage for energy dissipation, thereby improving the energy-dissipating capacity of the structure, increasing the structural damping, and reducing the response of the structure under medium and large earthquakes. At the same time, some mild steel dampers are also used in engineering, but usually the components of mild steel dampers are relatively small, so the lateral stiffness provided in the elastic stage is very small, and the steel plates used in mild steel dampers are usually relatively thick, which is uneconomical.

[0003] Therefore, there is an urgent need for a prefabricated buckling-restrained damper wall structure and a construction method thereof to overcome the deficiencies of the prior art. Summary of the Invention

[0004] The purpose of the present invention is to provide a prefabricated buckling-restrained damper wall structure and a construction method thereof to solve the problems existing in the above prior art.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The present invention provides a prefabricated buckling-restrained damper wall structure, which includes an edge frame. A damper wall body is arranged inside the edge frame. The damper wall body includes an inner core steel plate. T-shaped fish-tail plates are welded to the edges of the inner core steel plate. The T-shaped fish-tail plates are fixed to the edge frame through first connecting bolts. Buckling-restrained members are fixed to both sides of the inner core steel plate through second connecting bolts. A rubber layer is arranged between the buckling-restrained members and the inner core steel plate.

[0007] Preferably, the edge frame includes an upper frame beam, a lower frame beam, a left frame column and a right frame column, and the upper frame beam, the lower frame beam, the left frame column and the right frame column are enclosed and connected.

[0008] Preferably, the inner core steel plate is made of structural steel or low-yield-point mild steel.

[0009] Preferably, the T-shaped fish-tail plate includes a web and a flange vertically fixed thereto. The web is fixed to the inner core steel plate through fillet welds, and the flange is fixed to the edge frame through the first connecting bolts.

[0010] Preferably, the buckling-restrained member includes two vertically arranged square steel tubes. Transverse square steel tubes are vertically fixed to both ends of the vertically arranged square steel tubes. Stiffening ribs are arranged between the transverse square steel tubes and the vertically arranged square steel tubes. Multiple pairs of batten plates are arranged between the vertically arranged square steel tubes. The second connecting bolts pass through the gaps between the batten plates and are fixed to the inner core steel plate.

[0011] Preferably, the length of the vertically arranged square steel tube is less than the distance between the T-shaped fish-tail plates on the upper and lower sides.

[0012] Preferably, the cross-section of the vertically arranged square steel tube is the same as that of the transverse square steel tube.

[0013] Preferably, the bottom of the batten plate is flush with the bottom of the vertically arranged square steel tube, and its thickness is less than the sectional height of the vertically arranged square steel tube.

[0014] Preferably, the length of the second connecting bolt is not greater than twice the sectional height of the vertically arranged square steel tube.

[0015] The present invention also provides a construction method for a prefabricated buckling-restrained damper wall structure, which includes the following steps:

[0016] Step 1: Determine the overall dimensions. Determine the dimensions of the inner core steel plate and the buckling-restrained members according to the design requirements.

[0017] Step 2: Determine the dimensions of the components. Determine the number of hole arrangements and the diameter of the connecting bolts according to the overall dimensions determined in Step 1.

[0018] Step 3: Preparation of components. According to the determined dimensions, prefabricate and process the inner core steel plates, T-shaped fish tail plates, and buckling-restrained components in the factory.

[0019] Step 4: Assembly of components. Weld the inner core steel plates and T-shaped fish tail plates in the factory, paste a rubber layer on the surface of the buckling-restrained component, and complete the bolt connection between the buckling-restrained component, the inner core steel plate, and the fish tail plate.

[0020] Step 5: Overall quality inspection. Complete the construction of the prefabricated buckling-restrained damping wall structure.

[0021] The present invention has achieved the following beneficial technical effects compared with the prior art:

[0022] 1. The steel plates used in the damping wall are relatively thin, which can significantly reduce the steel consumption of the structure. At the same time, the steel plates of the damping wall can be arranged in a large range in one span, significantly improving the lateral stiffness of the structural system.

[0023] 2. By using the rubber layer provided between the buckling-restrained component and the inner core steel plate, the damping and energy dissipation capacity of the structure can be effectively increased. At the same time, taking advantage of the good deformation ability of the rubber layer, the buckling-restrained component can better limit the out-of-plane deformation of the inner core steel plate.

[0024] 3. The rubber layer provided at the end beam of the buckling-restrained component does not participate in the force in the elastic stage. After the structure enters the elastoplastic stage, the rubber layer dissipates energy through friction. In the plastic stage, the rubber layer enters the large deformation stage and can bear a certain load, thus making up for the problem of excessive reduction in stiffness when the structure enters the plastic stage. By utilizing the large deformation characteristics of the rubber layer, a certain self-centering function is achieved, thus giving full play to the three-stage mechanical properties of the damping wall.

[0025] The present invention is applicable to high-rise buildings and seismic fortification buildings in earthquake-prone areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic diagram of the prefabricated buckling-restrained damping wall structure provided by the present invention;

[0028] Figure 2 It is an exploded view of the prefabricated buckling-restrained damping wall structure provided by the present invention;

[0029] Figure 3Schematic diagram of the damping wall body structure in the assembled buckling-restrained damping wall structure provided by the present invention;

[0030] Figure 4 Schematic diagram of the buckling-restrained member structure in the assembled buckling-restrained damping wall structure provided by the present invention;

[0031] In the figure: 1 - damping wall body, 2 - edge frame, 3 - first connecting bolt, 1.1 - inner core steel plate, 1.2 - T-shaped fish tail plate, 1.3 - buckling-restrained member, 1.4 - rubber interlayer, 1.5 - second connecting bolt, 1.3.1 - vertical square steel pipe, 1.3.2 - lacing block, 1.3.3 - horizontal square steel pipe, 1.3.4 - stiffening rib. Specific implementation manner

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] The purpose of the present invention is to provide an assembled buckling-restrained damping wall structure and its construction method to solve the problems existing in the prior art.

[0034] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0035] Embodiment 1:

[0036] This embodiment provides an assembled buckling-restrained damping wall structure, as Figures 1 - 3As shown, it includes an edge frame 2, and the edge frame 2 includes an upper frame beam, a lower frame beam, a left frame column and a right frame column, and the upper frame beam, the lower frame beam, the left frame column and the right frame column are surrounded and welded together; a damping wall body 1 is arranged inside the edge frame 2, and the damping wall body 1 includes a core steel plate 1.1. The core steel plate 1.1 can be a single layer or multiple layers of thin steel plates. When it is multiple layers of steel plates, adhesive materials such as rubber can be arranged between the steel plates. On the one hand, it can fill the gaps, and on the other hand, it can dissipate energy through friction. The core steel plate is made of structural steel or low-yield-point mild steel; a T-shaped fishplate 1.2 is welded to the edge of the core steel plate 1.1. As its name implies, the T-shaped fishplate 1.2 has a T-shaped cross-section structure and is composed of a web and a flange vertically fixed thereto. The T-shaped fishplate 1.2 can be obtained by cutting an I-beam along the center line of the web, or by welding two vertically overlapping long strip steel plates. The thickness of the flange and the web of the T-shaped fishplate 1.2 should be significantly greater than the thickness of the core steel plate 1.1 to ensure that the T-shaped fishplate 1.2 does not undergo obvious deformation and damage during the force-bearing process of the damping wall. The width of the flange of the T-shaped fishplate 1.2 should be less than the width of the beam of the edge frame 2, and the length should be less than the lengths of the upper frame beam and the lower frame beam in the edge frame 2 and greater than the width of the core steel plate 1.1. The web is fixed to the core steel plate 1.1 through fillet welds. Specifically, the upper and lower sides of the core steel plate 1.1 overlap with the web of the T-shaped fishplate 1.2 for a certain length and are connected by two fillet welds on the front and back. The welds can be continuous welds or intermittent welds considering the design requirements of the wall and the thickness of the core steel plate. The flange is fixed to the edge frame 2 through the first connecting bolts 3; the web of the T-shaped fishplate 1.2 should have a certain height, and at least one row of bolt holes can be arranged for connecting with the buckling restraint member 1.3; buckling restraint members 1.3 are fixed to both sides of the core steel plate 1.1 through the second connecting bolts 1.5, and the buckling restraint members 1.3 on both sides are symmetrically arranged. A rubber layer 1.4 is arranged between the buckling restraint member 1.3 and the core steel plate 1.1. The rubber interlayer 1.4 covers the contact planes of the buckling restraint member 1.4 with the core steel plate 1.1 and the edge frame 2 to ensure that the buckling restraint member 1.2 is always in contact with the rubber interlayer and does not directly contact the core steel plate 1.1 and the edge frame 2 under the designed inter-story drift angle. The setting of the rubber layer 1.4 can, on the one hand, eliminate the gap between the buckling restraint member and the core steel plate caused by the unevenness of the steel plate, and on the other hand, generate friction between the rubber layer and the steel plate during the force-bearing process of the damping wall, thereby further increasing the structural damping and dissipating energy. In some embodiments, the rubber layer 1.4 can be made of other adhesive materials.

[0037] By adopting the above technical solution, under the action of minor earthquakes, the relative deformation of the edge frame 2 will compress the rubber layer 1.4. At this time, the buckling restraint member 1.3 on the outside basically does not participate in the force. Under the action of moderate earthquakes, the inner core steel plate 1.1 enters the yield energy dissipation, and at the same time, the rubber layer 1.4 generates a large compression deformation, and the edge frame 2 generates pressure, dissipating energy through the rubber layer 1.4 and further increasing the damping of the structure; under the action of major earthquakes, the damping wall enters the plastic stage. At this time, the structural stiffness is significantly reduced. By using the close contact action of the edge frame 2 and the buckling restraint member 1.3 on the outside, the buckling restraint member 1.3 on the outside undertakes a certain lateral load, thereby making up for the problem that the structural stiffness decreases too much when entering the plastic stage.

[0038] Specifically, as Figure 4 shown, the buckling restraint member 1.3 includes two vertically arranged square steel pipes 1.3.1. At both ends of the vertically arranged square steel pipes 1.3.1, horizontal square steel pipes 1.3.3 are perpendicularly fixed. The horizontal square steel pipes increase the contact area between the buckling restraint member and the edge frame. Between the horizontal square steel pipes 1.3.3 and the vertically arranged square steel pipes 1.3.1, stiffening ribs 1.3.4 are provided. Between the vertically arranged square steel pipes 1.3.1, multiple pairs of gusset plates 1.3.2 are provided. The second connecting bolt 1.5 passes through the gap between the gusset plates 1.3.2 and is fixed to the inner core steel plate 1.1. The gap between the gusset plates 1.3.2 is larger than the diameter of the second connecting bolt 1.5 to allow relative sliding between the buckling restraint member and the inner core steel plate.

[0039] Among them, the vertically arranged square steel pipes 1.3.1, the gusset plates 1.3.2, the horizontal square steel pipes 1.3.3 and the stiffening ribs 1.3.4 are fixed by welding.

[0040] Furthermore, the length of the vertically arranged square steel pipe is less than the distance between the T-shaped fish tail plates on the upper and lower sides, so as to leave a gap for pasting the rubber layer 1.4.

[0041] Furthermore, the cross-section of the vertically arranged square steel pipe 1.3.1 is the same as that of the horizontal square steel pipe 1.3.3.

[0042] Furthermore, the bottom of the gusset plate 1.3.2 is flush with the bottom of the vertically arranged square steel pipe 1.3.1, and its thickness is less than the cross-sectional height of the vertically arranged square steel pipe 1.3.1.

[0043] Furthermore, the length of the second connecting bolt 1.5 is not greater than twice the cross-sectional height of the vertically arranged square steel pipe 1.3.1. The length of the second connecting bolt 1.5 is adapted to the wall thickness to ensure that both ends of the connecting bolt do not protrude from the wall after the buckling restraint member 1.3 is connected to the inner core steel plate 1.1. The diameter of the connecting bolt 1.5 is determined according to the calculation to ensure that it does not fail under the design story drift angle of the damping wall.

[0044] This embodiment also provides a construction method for an assembled buckling-restrained damper wall structure, which includes the following steps:

[0045] Step 1: Preparation work. Determine the dimensions of the edge frame according to the design requirements.

[0046] Step 2: Determine the dimensions of the damper wall. According to the dimensions of the edge frame determined in Step 1 and the energy dissipation requirements provided by the structure for the damper wall, determine the overall dimensions of the inner core steel plate 1.1, the stiffness requirements and the arrangement quantity of the buckling-restrained members 1.3.

[0047] Step 3: Determine the dimensions of the components. Determine the dimensions of the T-shaped fish tail plate 1.2 and the number of bolt holes on the flange plate, the number of bolt holes on the beam of the edge frame 2, and the diameter of the connecting bolt 3 according to the dimensions of the inner core steel plate 1.1 determined in Step 2; determine the dimensions of the vertical square steel pipe 1.3.1 in the buckling-restrained member, the number of pairs of the gusset plates 1.3.2, the number and diameter of the second connecting bolts 1.5, and the number of bolt holes on the webs of the inner core steel plate 1.1 and the fish tail plate 1.2 according to the stiffness requirements and the arrangement quantity of the buckling-restrained members 1.3 determined in Step 2.

[0048] Step 4: Fabricate the inner core steel plate and the buckling-restrained members. According to the determined dimensions, prefabricate and process the inner core steel plate 1.1, the fish tail plate 1.2 and the buckling-restrained members 1.3 in the factory, complete the welding of the inner core steel plate 1.1 and the fish tail plate 1.2, paste the rubber layer 1.4 on the designed friction surface of the buckling-restrained member 1.3, and connect the buckling-restrained member 1.3 with the inner core steel plate 1.1 and the fish tail plate 1.2 by the second connecting bolts 1.5.

[0049] Step 5: On-site installation of the damper wall. Hoist the damper wall 1 into the inner space of the edge frame 2, finely adjust the position of the damper wall until the bolt holes on the flange of the fish tail plate 1.2 are aligned with the hole positions on the edge frame 2, and connect the damper wall 1 with the edge frame 2 by the first connecting bolts 3.

[0050] Step 6: Overall quality inspection. Complete the construction of the assembled buckling-restrained damper wall structure.

[0051] The present invention expounds the principle and implementation mode of the present invention by applying specific examples. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An assembled buckling-restrained damper wall structure, characterized in that: It includes an edge frame, a damper wall body is arranged inside the edge frame, the damper wall body includes a core steel plate, T-shaped fish tail plates are welded to the edges of the core steel plate, the T-shaped fish tail plates are fixed to the edge frame through first connecting bolts, buckling-restrained members are fixed to both sides of the core steel plate through second connecting bolts, and a rubber layer is arranged between the buckling-restrained members and the core steel plate; The core steel plate is made of structural steel or low-yield-point mild steel; The buckling-restrained member includes two vertically arranged square steel pipes, horizontal square steel pipes are perpendicularly fixed to both ends of the vertically arranged square steel pipes, stiffening ribs are arranged between the horizontal square steel pipes and the vertically arranged square steel pipes, multiple pairs of lacing blocks are arranged between the vertically arranged square steel pipes, and the second connecting bolts pass through the gaps between the lacing blocks and are fixed to the core steel plate.

2. The assembled buckling-restrained damper wall structure according to claim 1, characterized in that: The edge frame includes an upper frame beam, a lower frame beam, a left frame column and a right frame column, and the upper frame beam, the lower frame beam, the left frame column and the right frame column are surrounded and connected.

3. The assembled buckling-restrained damper wall structure according to claim 1, characterized in that: The T-shaped fish tail plate includes a web and a flange perpendicularly fixed thereto, the web is fixed to the core steel plate through fillet welds, and the flange is fixed to the edge frame through the first connecting bolts.

4. The assembled buckling-restrained damper wall structure according to claim 1, characterized in that: The length of the vertically arranged square steel pipe is less than the distance between the T-shaped fish tail plates on the upper and lower sides.

5. The assembled buckling-restrained damper wall structure according to claim 1, characterized in that: The cross-section of the vertically arranged square steel pipe is the same as that of the horizontally arranged square steel pipe.

6. The assembled buckling-restrained damper wall structure according to claim 1, characterized in that: The bottom of the lacing block is flush with the bottom of the vertically arranged square steel pipe, and its thickness is less than the cross-section height of the vertically arranged square steel pipe.

7. The assembled buckling-restrained damper wall structure according to claim 1, characterized in that: The length of the second connecting bolt is not greater than twice the cross-section height of the vertically arranged square steel pipe.

8. A construction method of the assembled buckling-restrained damper wall structure according to any one of claims 1-7, characterized in that: It includes the following steps: Step 1, overall dimension determination, determine the dimensions of the core steel plate and the buckling-restrained members according to the design requirements; Step 2, component dimension determination, determine the number of hole arrangements and the diameter of the connecting bolts according to the overall dimensions determined in Step 1; Step 3, component preparation, prefabricate and process the core steel plate, T-shaped fish tail plates and buckling-restrained members in the factory according to the determined dimensions; Step 4, component assembly, complete the welding of the core steel plate and the T-shaped fish tail plates in the factory, paste a rubber layer on the surface of the buckling-restrained members, and complete the bolt connection of the buckling-restrained members, the core steel plate and the fish tail plates; Step 5, overall quality inspection, complete the construction of the assembled buckling-restrained damper wall structure.

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