CN116335313A - A prefabricated buckling restrained damping wall structure and its construction method - Google Patents

Abstract

The invention discloses an assembled buckling restrained damping wall structure and a construction method thereof, belonging to the technical field of structural engineering; the damping wall comprises a damping wall body, an edge frame and a first connecting bolt; the damping wall body comprises an inner core steel plate, a T-shaped fishplate, a buckling restrained member, a rubber layer and a second connecting bolt; a rubber layer is arranged between the inner core steel plate and the buckling restrained member and between the edge frame and the buckling restrained member, so that the multifunctional functions of providing rigidity in the small-vibration elastic stage, dissipating energy in the medium-vibration elastoplastic stage and further providing rigidity in the large-vibration plastic stage are exerted; meanwhile, the buckling restrained member is arranged, so that the buckling restrained member is prevented from bearing excessive shear damage, and an enough anchoring effect can be achieved; the invention has the side force resisting function of the common shear wall, can be used as a damping wall for a structural system to play a role in energy consumption and shock absorption, and has the advantages of high assembly degree, convenience in transportation and installation and stable component performance.

Description

A prefabricated buckling restrained damping wall structure and its construction method

technical field

The invention relates to the technical field of structural engineering, in particular to an assembled buckling-constrained damping wall structure and a construction method thereof.

Background technique

my country is an earthquake-prone country. According to statistics, earthquakes of magnitude 7 or above in my country account for 1/3 of the earthquakes of magnitude 7 or above in the world's continents, and the death toll due to earthquakes accounts for 1/2 of the world; 41% of my country's land, more than half of the cities located in the earthquake Areas with a basic intensity of 7 degrees and above. In 2021, the State Council promulgated the "Regulations on the Management of Earthquake Resistance of Construction Projects", which stipulates: "Newly built schools, kindergartens, hospitals, elderly care institutions, child welfare institutions, emergency command centers, emergency shelters, and broadcasting facilities located in high-intensity fortification areas and key earthquake monitoring and defense areas Buildings such as televisions should adopt shock isolation and shock absorption technologies in accordance with relevant national regulations to ensure that they can meet normal use requirements when fortified earthquakes occur in this area.” Therefore, shock absorbing components have been popularized and applied in structures to improve the strength of structural systems. Anti-seismic performance. Buckling-resistant braces have been popularized and applied in engineering as an energy-dissipating component with superior performance. The restraint component is used to restrain the out-of-plane buckling deformation of the intermediate steel core component, so as to obtain stable and full hysteretic performance. However, due to the relatively small core area of the traditional buckling-resistant braces, the lateral stiffness is limited. When applied in high-rise buildings, the cross-sectional area of the buckling-resistant braces will be significantly increased. Excessively large brace cross-sectional areas will lead to exposed braces or require more Thick walls are decorated with supports to reduce the usable area of the structure; at the same time, the supports are usually connected to the beam-column joints. At this time, the existence of supports will limit the opening of doors, windows and openings in the structure, thereby affecting the use of the structure. In addition, the setting of the existing anti-buckling braces is usually a two-stage design. The elastic stage is used to improve the lateral stiffness of the structure, and the elastic-plastic stage is used to dissipate energy, thereby improving the energy dissipation capacity of the structure, increasing structural damping, and reducing Response of structures under moderate and large earthquakes. At the same time, some mild steel dampers are also used in engineering, but usually the size of the components of mild steel dampers is small, so the lateral stiffness provided in the elastic stage is very small, and the steel plates usually used in mild steel dampers are relatively thick, which is not economical.

Therefore, there is an urgent need for a prefabricated buckling-constrained damping wall structure and its construction method to overcome the deficiencies of the prior art.

Contents of the invention

The purpose of the present invention is to provide an assembled buckling-constrained damping wall structure and its construction method, so as to solve the above-mentioned problems in the prior art.

To achieve the above object, the present invention provides the following scheme:

The invention provides an assembled buckling-constrained damping wall structure, which includes an edge frame, and a damping wall body is arranged inside the edge frame, and the damping wall body includes an inner core steel plate, and T-shaped fishplates are welded on the edge of the inner core steel plate , the T-shaped fish plate is fixed to the edge frame by first connecting bolts, buckling restraint members are fixed on both sides of the inner core steel plate by second connecting bolts, the buckling restraint member and the inner core steel plate are fixed There is a rubber layer in between.

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.

Preferably, the core steel plate is made of structural steel or mild steel with a low yield point.

Preferably, the T-row fishplate includes a web and a flange vertically fixed thereto, the web is fixed to the inner core steel plate through a fillet weld, and the flange is connected to the inner core plate through the first connecting bolt. The edge frame is fixed.

Preferably, the buckling restraining member includes two vertical square steel pipes arranged in parallel, horizontal square steel pipes are vertically fixed at both ends of the vertical square steel pipes, and the gap between the horizontal square steel pipes and the vertical square steel pipes is Stiffening ribs are provided, multiple pairs of patch blocks are arranged between the vertical square steel pipes, and the second connecting bolts pass through the gaps between the blocks and are fixed to the inner core steel plate.

Preferably, the length of the vertical square steel pipe is less than the distance between the upper and lower sides of the T-shaped fish plate.

Preferably, the cross section of the vertical square steel pipe is the same as that of the horizontal square steel pipe.

Preferably, the bottom of the block is flush with the bottom of the vertical square steel pipe, and its thickness is smaller than the cross-sectional height of the vertical square steel pipe.

Preferably, the length of the second connecting bolt is not greater than twice the cross-sectional height of the vertical square steel pipe.

The present invention also provides a construction method for an assembled buckling restrained damping wall structure, which includes the following steps:

Step 1. The overall size is determined, and the size of the core steel plate and the buckling restraint member are determined according to the design requirements;

Step 2, determine the size of the component, and determine the number of openings and the diameter of the connecting bolts according to the overall size determined in step 1;

Step 3, the preparation of components, according to the determined size, the prefabrication processing of core steel plates, T-shaped fishplates and buckling restraint components is carried out in the factory;

Step 4, component assembly, complete the welding of the inner core steel plate and the T-shaped fishplate in the factory, paste the rubber layer on the surface of the buckling restraint member, and complete the bolt connection of the buckling restraint member, inner core steel plate and fishplate;

Step 5: Overall quality inspection, and the construction of the assembled buckling-constrained damping wall structure is completed.

Compared with the prior art, the present invention has achieved the following beneficial technical effects:

1. Thinner steel plates used in the damping wall can significantly reduce the amount of steel used in the structure. At the same time, the steel plates of the damping wall can be arranged in a large range in a span, which significantly improves the lateral stiffness of the structural system;

2. Using the rubber layer set between the buckling constrained member and the inner core steel plate can effectively increase the damping and energy dissipation capacity of the structure, and at the same time take advantage of the good deformation ability of the rubber layer, so that the buckling constrained member can better limit the out-of-plane of the inner core steel plate deformation;

3. The rubber layer set on the beam at the end of the buckling constrained member does not participate in the force in the elastic stage. After the structure enters the elastic-plastic stage, the friction of the rubber layer is used to dissipate energy. In the plastic stage, the rubber layer enters the large deformation stage and can withstand a certain Load, so as to make up for the problem of excessive reduction in stiffness when the structure enters the plastic stage, and use the large deformation characteristics of the rubber layer to play a certain self-resetting function, so as to give full play to the three-stage mechanical performance of the damping wall.

The invention is suitable for high-rise buildings and anti-seismic fortified buildings in earthquake-prone areas.

Description of drawings

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 accompanying drawings required in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is a structural schematic diagram of an assembled buckling-constrained damping wall provided by the present invention;

Figure 2 is an exploded view of the assembled buckling restrained damping wall structure provided by the present invention;

Fig. 3 is a schematic diagram of the structure of the damping wall body in the assembled buckling-constrained damping wall structure provided by the present invention;

Fig. 4 is a structural schematic diagram of buckling constrained components in the assembled buckling constrained damping wall structure provided by the present invention;

In the figure: 1-damping wall body, 2-edge frame, 3-first connecting bolt, 1.1-core steel plate, 1.2-T-shaped fishplate, 1.3-buckling restraint member, 1.4-rubber interlayer, 1.5-second connection Bolt, 1.3.1-vertical square steel pipe, 1.3.2-block, 1.3.3-transverse square steel pipe, 1.3.4-stiffener.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The object of the present invention is to provide an assembled buckling-constrained damping wall structure and its construction method, so as to solve the problems existing in the prior art.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

This embodiment provides an assembled buckling-constrained damping wall structure, as shown in Figure 1-3, including an edge frame 2, 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 enclosed and welded; the edge frame 2 is provided with a damping wall body 1, and the damping wall body 1 includes a core steel plate 1.1, which can be a single-layer or multi-layer thin steel plate, as For multi-layer steel plates, adhesive materials such as rubber can be placed between the steel plates. On the one hand, it can fill the gap, and on the other hand, it can dissipate energy through friction. The inner core steel plate adopts structural steel or low yield point mild steel; T-shaped fishplate 1.2, T-row fishplate 1.2, as the name suggests, its cross-section is a T-shaped structure, which is composed of a web and a flange fixed vertically to it. T-shaped fishplate 1.2 can be obtained by cutting I-shaped steel along the midline of the web , can also be obtained by welding two vertically lapped strip-shaped steel plates. The thickness of the flange and 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 fishtail plate is under stress during the damping wall. Plate 1.2 does not undergo obvious deformation and damage, and the width of the flange of T-shaped fishplate 1.2 should be smaller than the width of the edge frame 2 beam, and the length should be less than the length of the upper frame beam and lower frame beam in the edge frame 2, and greater than that of the inner core steel plate 1.1 Width, 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 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 sides. The welds are considered The design requirements of the wall and the thickness of the core steel plate can be welded through the length or intermittent welding, the flange is fixed with the edge frame 2 by the first connecting bolt 3, the web of the T-shaped fishplate 1.2 should have a certain height, and at least one row can be arranged The bolt holes are used to connect with the buckling constrained member 1.3; both sides of the inner core plate 1.1 are fixed with the buckling constrained member 1.3 by the second connecting bolt 1.5, the buckling constrained members 1.3 on both sides are arranged symmetrically, and the buckling constrained member 1.3 is connected to the inner core plate 1.1 There is a rubber layer 1.4 between them, and the rubber interlayer 1.4 covers the contact plane between the buckling restraint member 1.4, the inner core steel plate 1.1, and the edge frame 2, so as to ensure that the buckling restraint member 1.2 is always in contact with the rubber interlayer and not with the inner core steel plate under the design interlayer displacement angle 1.1. The edge frame 2 is in direct contact. On the one hand, the setting of the rubber layer 1.4 can eliminate the gap between the buckling restraint member and the inner core steel plate caused by the unevenness of the steel plate. On the other hand, the rubber layer and the steel plate will Friction is generated between them, thereby further increasing structural damping and dissipating energy. In some embodiments, the rubber layer 1.4 can use other bonding materials.

By adopting the above technical solution, under the action of small 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, and the inner core steel plate 1.1 enters yield and consumes energy under the action of a moderate earthquake. , at the same time, the rubber layer 1.4 produces large compression deformation, and the edge frame 2 generates pressure, which dissipates energy through the rubber layer 1.4 and further improves the damping of the structure; The close contact between the edge frame 2 and the outer buckling-restraining member 1.3 makes the outer buckling-restraining member 1.3 bear a certain lateral load, thereby making up for the problem of excessive reduction in stiffness when the structure enters the plastic stage.

Specifically, as shown in Figure 4, the buckling restraint member 1.3 includes two vertical square steel pipes 1.3.1 arranged in parallel, the two ends of the vertical square steel pipes 1.3.1 are vertically fixed with horizontal square steel pipes 1.3.3, The steel pipe increases the contact area between the buckling constrained member and the edge frame, stiffeners 1.3.4 are provided between the horizontal square steel pipe 1.3.3 and the vertical square steel pipe 1.3.1, and multiple pairs of stiffeners are provided between the vertical square steel pipe 1.3.1. The patch 1.3.2, the second connecting bolt 1.5 is fixed to the core steel plate 1.1 through the gap between the patch 1.3.2, and the gap between the patch 1.3.2 is larger than the diameter of the second connecting bolt 1.5 to allow the buckling restraint member to be connected with Relative sliding of inner core steel plate occurs.

Among them, the vertical square steel pipe 1.3.1, the patch 1.3.2, the transverse square steel pipe 1.3.3 and the stiffener 1.3.4 are fixed by welding.

Further, the length of the vertical square steel pipe is smaller than the distance between the upper and lower T-shaped fishplates, so as to leave a gap for pasting the rubber layer 1.4.

Further, the section of the vertical square steel pipe 1.3.1 is the same as that of the horizontal square steel pipe 1.3.3.

Further, the bottom of the patch 1.3.2 is flush with the bottom of the vertical square steel pipe 1.3.1, and its thickness is smaller than the section height of the vertical square steel pipe 1.3.1.

Further, the length of the second connecting bolt 1.5 is not greater than twice the section height of the vertical square steel pipe 1.3.1, and the length of the second connecting bolt 1.5 is adapted to the thickness of the wall to ensure that the buckling restraint member 1.3 is connected to the inner core steel plate 1.1 The two ends of the connecting bolt do not protrude from the wall, and the diameter of the connecting bolt 1.5 is determined according to the calculation to ensure that it will not be damaged under the design interstory displacement angle of the damping wall.

This embodiment also provides a construction method for a prefabricated buckling-constrained damping wall structure, including the following steps:

Step 1, preparation work, determine the size of the edge frame according to the design requirements;

Step 2: Determine the size of the damping wall. According to the size of the edge frame determined in step 1 and the energy dissipation requirements provided by the structure for the damping wall, determine the overall size of the inner core steel plate 1.1, the stiffness requirements and layout quantity of the buckling restraint member 1.3;

Step 3. Determine the size of the component. According to the size of the core steel plate 1.1 determined in step 2, determine the size of the T-shaped fishplate 1.2, the number of bolt holes on the flange plate, the number of bolt holes on the edge frame 2 beams, and the connecting bolts 3; determine the size of the vertical square steel pipe 1.3.1 in the buckling constrained member, the logarithm of the patch 1.3.2, and the number of the second connecting bolt 1.5 according to the stiffness requirements and arrangement quantity of the buckling constrained member 1.3 determined in step 2 number and diameter, and number of bolt holes in the core plate 1.1 and fishplate 1.2 web;

Step 4: Prepare the core steel plate and the buckling restraint member. According to the determined size, prefabricate the core steel plate 1.1, the fishplate 1.2 and the buckling restraint member 1.3 in the factory, and complete the welding of the core steel plate 1.1 and the fishplate 1.2. The rubber layer 1.4 is pasted on the design friction surface of the constraint member 1.3, and the buckling constraint member 1.3 is connected with the inner core steel plate 1.1 and the fishplate 1.2 with the second connecting bolt 1.5;

Step 5. On-site installation of the damping wall, hoist the damping wall 1 to the inner space of the edge frame 2, fine-tune the position of the damping wall until the bolt holes on the flange of the fishplate 1.2 are aligned with the holes on the edge frame 2, and use the first connecting bolt 3 Connect the damping wall 1 with the edge frame 2;

Step six, the overall quality inspection, and the construction of the prefabricated buckling-constrained damping wall structure is completed.

The present invention uses specific examples to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; meanwhile, for those of ordinary skill in the art, according to the present invention Thoughts, there will be changes in specific implementation methods and application ranges. In summary, the content of this specification should not be construed as limiting the present invention.

Claims (10)

1. A prefabricated buckling restrained damping wall structure, characterized in that: comprise an edge frame, a damping wall body is provided in the edge frame, the damping wall body includes a core steel plate, and the edge of the core steel plate is welded with a T-shaped A fishplate, the T-shaped fishplate is fixed to the edge frame through a first connecting bolt, buckling constraining members are fixed on both sides of the core steel plate through a second connecting bolt, and the buckling constraining member is connected to the A rubber layer is provided between the core steel plates. 2. The fabricated buckling restrained damping wall structure according to claim 1, wherein the edge frame comprises an upper frame beam, a lower frame beam, a left frame column and a right frame column, the upper frame beam, the The lower frame beam, the left frame column and the right frame column are enclosed and connected. 3. The fabricated buckling restrained damping wall structure according to claim 1, characterized in that: the core steel plate is made of structural steel or mild steel with a low yield point. 4. The fabricated buckling-constrained damping wall structure according to claim 1, characterized in that: the T-row fishplates comprise webs and flanges fixed perpendicular thereto, and the webs are connected to the webs through fillet welds. The core steel plate is fixed, and the flange is fixed to the edge frame through the first connecting bolts. 5. The fabricated buckling-constrained damping wall structure according to claim 1, characterized in that: the buckling-constrained member comprises two vertical square steel pipes arranged in parallel, and both ends of the vertical square steel pipes are vertically fixed with Horizontal square steel pipes, stiffening ribs are provided between the horizontal square steel pipes and the vertical square steel pipes, multiple pairs of blocks are arranged between the vertical square steel pipes, and the second connecting bolts pass through the The gap between the blocks is fixed with the core steel plate. 6 . The fabricated buckling-constrained damping wall structure according to claim 5 , wherein the length of the vertical square steel pipe is smaller than the distance between the T-shaped fishplates on the upper and lower sides. 7 . 7. The fabricated buckling-constrained damping wall structure according to claim 5, wherein the section of the vertical square steel pipe is the same as that of the transverse square steel pipe. 8. The fabricated buckling-constrained damping wall structure according to claim 5, characterized in that: the bottom of the patch is flush with the bottom of the vertical square steel pipe, and its thickness is smaller than that of the vertical square steel pipe section height. 9. The fabricated buckling-constrained damping wall structure according to claim 5, wherein the length of the second connecting bolt is not greater than twice the cross-sectional height of the vertical square steel pipe. 10. A construction method for a prefabricated buckling restrained damping wall structure, characterized in that: comprising the following steps: Step 1. The overall size is determined, and the size of the core steel plate and the buckling restraint member are determined according to the design requirements; Step 2, determine the size of the component, and determine the number of openings and the diameter of the connecting bolts according to the overall size determined in step 1; Step 3, the preparation of components, according to the determined size, the prefabrication processing of core steel plates, T-shaped fishplates and buckling restraint components is carried out in the factory; Step 4, component assembly, complete the welding of the inner core steel plate and the T-shaped fishplate in the factory, paste the rubber layer on the surface of the buckling restraint member, and complete the bolt connection of the buckling restraint member, inner core steel plate and fishplate; Step 5: Overall quality inspection, and the construction of the assembled buckling-constrained damping wall structure is completed.

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