CN112196141A - Bolt rib mixed drawknot steel plate concrete combined shear wall and construction method - Google Patents
Bolt rib mixed drawknot steel plate concrete combined shear wall and construction method Download PDFInfo
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- CN112196141A CN112196141A CN202011125404.5A CN202011125404A CN112196141A CN 112196141 A CN112196141 A CN 112196141A CN 202011125404 A CN202011125404 A CN 202011125404A CN 112196141 A CN112196141 A CN 112196141A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/56—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
- E04B2/58—Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members with elongated members of metal
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Abstract
The invention relates to a bolt rib mixed drawknot steel plate concrete combined shear wall which comprises a plurality of U-shaped channel steels arranged in a row, side columns fixed on two sides of the U-shaped channel steels and concrete. The invention also provides a construction method of the shear wall.
Description
Technical Field
The technical field of building structure engineering, in particular to a section form of an assembled double-steel-plate concrete combined shear wall formed by hybrid pulling of studs and rib plates and a manufacturing method thereof.
Background
The double-steel-plate concrete combined shear wall is one of the most important load-bearing structures in a shear wall structure, a steel frame-shear wall structure or a steel frame-core tube structure, and the load-bearing capacity and the seismic performance of the double-steel-plate concrete combined shear wall directly influence the overall safety performance of a structural system. Theoretically, the steel plates in the double-steel-plate concrete combined shear wall have good constraint effect on the concrete, so that the bearing capacity of the concrete is effectively improved; meanwhile, the concrete filling also enables the surface steel plate not to be bent towards the inside of the wall body, so that the bearing capacity and the ductility of the shear wall are improved, but based on the previous experimental research, the side walls of the shear wall are all subjected to a phenomenon of hollowing and have a tendency of bulging outwards when the double-steel-plate concrete combined shear wall bears a certain load, so that it can be inferred that the concrete and the steel plate in a partial area are separated at the moment, and the mutual constraint between the concrete and the steel plate disappears, as shown in fig. 1, so that the working performance of the shear wall is greatly influenced.
At present, there are two steel plate concrete composite shear walls connected by studs (as shown in fig. 2), and experimental studies show that, when the composite shear wall only provided with studs bears pressure, no tension exists between two steel plates, although the studs can enhance the interaction between the steel plates and the concrete, the local buckling performance of the steel plates depends on the pulling strength of the studs, which determines that the stress performance of the composite shear wall is influenced too much by the thickness ratio of the stud pitch, and the connection quality of the studs is not easy to control. Meanwhile, the steel plate and concrete combined shear wall applied to the house has the advantages that the thickness of the steel plate is small (generally about 6 mm), the thickness of the shear wall is small, the stud welding quality is not easy to control, and the reliability of the stud is poor when the stud is tightly pulled. Under the condition of larger displacement, after the concrete cracks, the stud is pulled out, the shear wall is quickly damaged, and the bearing capacity is lost. Therefore, this form is not generally adopted in thin-walled shear walls of homes.
In addition, Hangzhou Xiao steel structure member limited company develops a steel tube bundle combined shear wall (as shown in figure 3) of U-shaped section bar, which has the advantages of high bearing capacity, good earthquake resistance and the like. However, experimental studies show that the stress performance of the steel pipe bundle unit is greatly influenced by the length of the steel pipe bundle unit, when a single steel pipe bundle unit is small, the interval of rib plates formed by splicing is small, the number of the rib plates is obviously increased, the bearing capacity is high, and the problems of overlarge welding amount, high difficulty in concrete pouring and the like can be caused; if single steel-pipe bundle unit is great, the floor interval is great, and the middle part steel sheet of part steel-pipe bundle is outwards buckled easily under the vertical heavy load condition, will appear the condition that steel sheet and concrete are thrown away, influences whole working property.
Therefore, the novel assembled double-steel-plate concrete combined shear wall which is formed by further optimizing the existing double-steel-plate concrete combined shear wall and provided with the bolt rib mixed pulling structure with more excellent mechanical property has important engineering significance and practical value. In the innovation process, the problems of mechanical safety performance, construction convenience, overall economy and the like should be considered.
Disclosure of Invention
The invention aims to provide a bolt rib mixed pulling fabricated double-steel-plate concrete combined shear wall form and a construction method thereof on the basis of research on the existing section form of a double-steel-plate concrete combined shear wall aiming at the defects in the prior art. The technical scheme is as follows:
the utility model provides a tie rib mixes drawknot steel sheet concrete combination shear wall, include the U type channel-section steel of a plurality of lines cloth and fix side column and the concrete in both sides, its characterized in that, U type channel-section steel includes the L type cold-formed steel sheet of the looks isostructure that two symmetries splice into, be provided with the peg along the direction of height on L type cold-formed steel sheet inner wall, the web fixed connection of two L type cold-formed steel sheets forms the floor, be provided with the hole along the direction of height on the floor for U type channel-section steel becomes the U type channel-section steel that has the hole.
The invention also provides a construction method of the shear wall, which comprises the following steps:
1) firstly, bending a steel plate into an L shape, and then cutting a semi-elliptical hole which is convenient for concrete to flow along the edge of the symmetrical splicing part to form an L-shaped cold-bending steel plate;
2) the method comprises the following steps that two L-shaped cold-bent steel plates of a welding stud are symmetrically spliced into a complete U-shaped channel steel with a hole, the splicing edges are welded, at the moment, web parts of the two L-shaped cold-bent steel plates are welded to form a rib plate of the whole shear wall, and then the U-shaped channel steel with the corresponding specification and an edge column are welded side by side into a straight line according to a design scheme of the shear wall to form a double-steel-plate cavity;
3) during on-site construction, after the upper layer and the lower layer of the double-steel-plate cavity are spliced, concrete is poured between the double steel plates, and the double steel plates are maintained and formed.
Compare with two steel sheet concrete composite shear walls of tradition, this novel composite shear wall does not have unnecessary process, and the elliptical hole of only steel plate can adopt crib crimper, numerical control to bore or numerical control cutting shaping with the shaping of buckling, and welding operation can adopt welding machine, processes at the mill.
The invention has the following beneficial effects:
1. compared with the common double-steel-plate concrete combined shear wall, the double-steel-plate concrete combined shear wall with the mixed tie ribs has the advantages that the ductility and the anti-seismic performance are greatly improved, and the construction aspect is greatly improved. Before the inner wall of the steel plate of the shear wall and the concrete are completely stripped, the connection between the inner wall of the steel plate of the shear wall and the concrete is ensured through the stud, so that the stud can play a role in drawknot reinforcement before the concrete is crushed and the steel plate is bent, the ductility and the energy consumption capability of a component under the action of an earthquake are enhanced, and the concrete and the steel plate can fully exert respective advantages. After the concrete is crushed, the stud can be pulled out, and the stiffening ribs tie the steel plates on the two sides at the moment, so that the important effect of maintaining the integrity of the shear wall is achieved, and the ductility of the structure is ensured.
2. In the aspect of stress, the constraint effect of the steel plate on the concrete is strengthened by the stud and the rib plate welded and formed in the middle, the strength and the ductility of the concrete are improved, meanwhile, the steel plate is prevented from buckling inwards, and the overall strength is improved. Under the normal use state, the bolt and the ribbed slab also further ensure the combined action of the steel plate surface and the concrete.
3. The welding stud not only improves the integrity of the combined shear wall, but also can properly widen the distance between rib plates, and reduces the number of U-shaped channel steel units in the same length, so that the welding amount can be greatly reduced under the condition of meeting the design requirement, and part of steel is also saved. Moreover, because the space between the rib plates is enlarged, the inner part of the rib plate has a relatively larger space, so that the concrete is more convenient to pour, easy to vibrate and easy to compact.
4. The size can be confirmed to the influence of structure and concrete kind (through experimental research, the holistic performance of shear force wall can not be influenced to the size of adjusting the elliptical aperture in certain extent) to the oval perforating hole of reserving on the fashioned rib face of concatenation, and the existence of elliptical aperture can guarantee concrete pouring for a whole rather than be independent of the concrete column in each U type channel steel unit, and such setting does benefit to and guarantees concrete, peg and floor combined action.
5. All the components and the assembling process of the shear wall can be prefabricated in a factory, and concrete pouring work is only carried out on site, so that the complexity of the process is not increased, the difficulty of site construction is not increased, and the uncertainty of the influence of most site welding work on the structure is avoided.
Drawings
FIG. 1 is a schematic diagram of steel plate and concrete failure constraint;
FIG. 2 is a stud-connected double steel plate concrete composite shear wall;
FIG. 3 is a steel tube bundle composite shear wall;
FIG. 4: detailed drawings of L-shaped cold-formed steel plates with studs;
FIG. 5: splicing detailed drawings of U-shaped channel steels;
FIG. 6: a detailed view of a rectangular steel pipe side column;
FIG. 7 is a perspective view of a double steel plate concrete composite shear wall;
fig. 8 is a detailed view of a double steel plate concrete combined shear wall.
Detailed Description
Particularly, through design and factory processing, reach the effect that stud and stiffening rib drawed the both sides steel sheet simultaneously, after forming the cavity of overall stability, the cast in situ concrete construction. And welding the studs on the inner wall of the L-shaped cold-bent steel plate, and then symmetrically splicing the two L-shaped cold-bent steel plates with the welded studs into a U-shaped channel steel. At this time, the web of the U-shaped channel steel forms a rib plate inside the combined shear wall, so that the combined shear wall basic unit with the bolt rib mixed pulling connection can be formed. Furthermore, a plurality of U-shaped channel steel splicing units are welded to form a shear wall cavity. And finally, pouring concrete into the double-steel-plate cavity to form the double-steel-plate concrete combined shear wall with the bolt rib mixed pulling structure. Considering the mobility and the continuity problem of the post-cast concrete, elliptical holes are reserved on the rib plates formed by splicing and welding, so that the compactness of the cast concrete is enhanced.
The rib plate formed by splicing the welding stud and the U-shaped channel steel can effectively improve the connection between the steel plate wall surface and the concrete, prevent the steel plate and the concrete in the combined shear wall from being prematurely peeled off under the action of load or earthquake, and further enhance the ductility and the energy consumption capability of the member under the action of earthquake. Due to the constraint effect of the studs and the rib plates on the concrete and the steel plates, the axial bearing capacity of the shear wall is partially improved. Adopt the stud drawknot, can suitably increase U-shaped channel-section steel concatenation unit size (stiffening rib interval), consequently effectively reduced the vertical welding volume of steel sheet. In addition, the U-shaped channel steel unit is formed by symmetrically splicing the L-shaped cold-bending steel plates, so that the problem of difficulty in stud welding construction inside the double-steel-plate concrete combined shear wall is effectively solved, and the industrial production of the combined shear wall is greatly promoted. Has good mechanical property, convenient construction and economic cost.
The invention relates to a bolt rib mixed pulling double-steel-plate concrete combined shear wall, which consists of the following parts: rectangular steel pipe concrete side post 1, L type clod wash steel sheet 2, peg 3, concrete 4, floor 5. Wherein the rib plate 5 is a part of the L-shaped cold-formed steel plate 2.
The specific implementation method comprises the following steps:
the steel plate is bent into an L shape, and then semi-elliptical holes convenient for concrete circulation are cut along the edges of the symmetrical splicing positions to form an L-shaped cold-bending steel plate unit (2) in the figure 4. Then, a stud (3) is welded on the inner wall of the L-shaped cold-bent steel plate along the height direction.
And in the figure 5, the L-shaped cold-bent steel plates of the welding studs are symmetrically spliced into a complete U-shaped channel steel, and the splicing edges are welded. At the moment, the two L-shaped web parts are welded to form a rib plate (5) of the whole shear wall. And then, according to the design scheme of the shear wall, the U-shaped channel steel with different specifications and the concrete filled steel tube side column (1) are welded side by side to form a straight line, all welding processes adopt equal-strength penetration welding, and the grade of a welding line is not less than two grades.
The above processes can all realize industrial production. The height H of the welding studs is less than 1/2H (the inside clear thickness of the section of the shear wall ensures that the L-shaped steel plate units can be symmetrically spliced without being influenced by the length of the studs.
And 3, during on-site construction, after the upper layer and the lower layer of the cavity of the double steel plates are spliced, pouring concrete (4) in the middle of the double steel plates, and curing and forming.
Compare with two steel sheet concrete composite shear walls of tradition, this novel composite shear wall does not have unnecessary process, and the elliptical hole of only steel plate can adopt crib crimper, numerical control to bore or numerical control cutting shaping with the shaping of buckling, and welding operation can adopt welding machine, processes at the mill. The size of the elliptical hole is not suitable to be too large, otherwise the mechanical property of the component is greatly reduced; the size of the stud is also selected properly, so that the welding quality of the stud and the inner wall of the shear wall steel plate is guaranteed, and the tensile strength of the stud and the concrete is guaranteed.
Claims (2)
1. The utility model provides a tie rib mixes drawknot steel sheet concrete combination shear wall, include the U type channel-section steel of a plurality of lines cloth and fix side column and the concrete in both sides, its characterized in that, U type channel-section steel includes the L type cold-formed steel sheet of the looks isostructure that two symmetries splice into, be provided with the peg along the direction of height on L type cold-formed steel sheet inner wall, the web fixed connection of two L type cold-formed steel sheets forms the floor, be provided with the hole along the direction of height on the floor for U type channel-section steel becomes the U type channel-section steel that has the hole.
2. A method of constructing a shear wall according to claim 1, comprising the steps of:
1) firstly, bending a steel plate into an L shape, and then cutting a semi-elliptical hole which is convenient for concrete to flow along the edge of the symmetrical splicing part to form an L-shaped cold-bending steel plate;
2) the method comprises the following steps that two L-shaped cold-bent steel plates of a welding stud are symmetrically spliced into a complete U-shaped channel steel with a hole, the splicing edges are welded, at the moment, web parts of the two L-shaped cold-bent steel plates are welded to form a rib plate of the whole shear wall, and then the U-shaped channel steel with the corresponding specification and an edge column are welded side by side into a straight line according to a design scheme of the shear wall to form a double-steel-plate cavity;
3) during on-site construction, after the upper layer and the lower layer of the double-steel-plate cavity are spliced, concrete is poured between the double steel plates, and the double steel plates are maintained and formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011125404.5A CN112196141A (en) | 2020-10-20 | 2020-10-20 | Bolt rib mixed drawknot steel plate concrete combined shear wall and construction method |
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| CN202011125404.5A CN112196141A (en) | 2020-10-20 | 2020-10-20 | Bolt rib mixed drawknot steel plate concrete combined shear wall and construction method |
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| CN112196141A true CN112196141A (en) | 2021-01-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497976A (en) * | 2023-06-28 | 2023-07-28 | 华侨大学 | Double-steel-plate-concrete combined shear wall connection node structure and connection construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497976A (en) * | 2023-06-28 | 2023-07-28 | 华侨大学 | Double-steel-plate-concrete combined shear wall connection node structure and connection construction method |
| CN116497976B (en) * | 2023-06-28 | 2023-09-26 | 华侨大学 | Double-steel-plate-concrete combined shear wall connection node structure and connection construction method |
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