Arc-shaped opening steel plate concrete sandwich shear wall and construction method

Abstract

The invention relates to an arc-opening steel plate concrete sandwich shear wall and a construction method, and belongs to the technical field of shear wall reinforcement. Comprising an arc-shaped opening steel plate, a concrete plate, an H-shaped steel frame in the horizontal direction, an H-shaped steel frame in the vertical direction and studs. The studs are welded on the arc-shaped opening steel plate; the number of the concrete slabs is two, the concrete slabs are hung on the arc-shaped opening steel plate through the front sides and the rear sides of the studs, the arc-shaped opening steel plate is clamped between the two concrete slabs, and a sandwich shear wall structure is formed. The arc-shaped opening in the arc-shaped opening steel plate is formed in the middle of the four edges of the arc-shaped opening steel plate and is half of the length of the corresponding edge, a diagonal tension belt is formed on the arc-shaped opening steel plate, and the boundary line of the diagonal tension belt is tangent to the arc-shaped opening at the end point. The shear wall has the advantages of being simple and rapid in construction, high in anti-seismic capacity and provided with three anti-seismic defense lines, green, low-carbon, assembled and energy-saving of the wall body are achieved, and meanwhile the anti-seismic capacity of the shear wall is improved.

Description

Technical Field

[0001] The invention relates to a shear wall, in particular to an arc-shaped opening steel plate concrete sandwich shear wall and a construction method, belonging to the technical field of shear wall reinforcement. Background Art

[0002] As the main component in a building that bears horizontal earthquake shear force, shear walls play an important role in ensuring the safety and reliability of the overall structure. Traditional shear wall components are mainly cast-in-place reinforced concrete, which requires a lot of wet work on site and has a heavy structure. The shear resistance of the shear wall can only be improved by increasing the cross-sectional size of the component.

[0003] In order to ensure earthquake resistance, traditional steel plate concrete composite shear walls generally do not have openings in the steel plates, resulting in large amounts of material consumption and complex construction. Summary of the invention

[0004] In view of the above-mentioned defects of the above-mentioned prior art, the present invention proposes an arc-shaped opening steel plate concrete sandwich shear wall and a construction method, which solves the problem of multiple seismic fortifications and has the distinctive characteristics of simple and fast construction, high seismic resistance, and three seismic defense lines, and realizes the green, low-carbon, assembled, and energy-saving nature of the wall, while improving the seismic resistance of the shear wall.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: The curved opening steel plate concrete sandwich shear wall comprises a curved opening steel plate, a concrete plate, a horizontal H-shaped steel frame, a vertical H-shaped steel frame and studs; The upper and lower sides of the arc-shaped opening steel plate are welded with horizontal H-shaped steel frames, and the left and right sides are welded with vertical H-shaped steel frames; the bolts are welded on the arc-shaped opening steel plate; The concrete slabs are two pieces, which are hung on the arc-shaped open steel plate through the front and rear sides of the bolts, and the arc-shaped open steel plate is sandwiched between the two concrete slabs to form a sandwich shear wall structure; in: The arc-shaped opening in the arc-shaped opening steel plate is arranged in the middle of the four sides of the arc-shaped opening steel plate, which is half the length of the corresponding side, so as to reduce the stress concentration phenomenon of the arc-shaped opening steel plate; The arc-shaped opening steel plate is formed with a diagonal tension band, and the boundary line of the diagonal tension band is a line formed by opposite endpoints at the distal ends of adjacent arc-shaped openings; the boundary line of the diagonal tension band is tangent to the arc-shaped opening at the endpoint, that is, the angle between the boundary line and the arc radius R of the arc-shaped opening is 90°. In addition, the height h of the arc-shaped opening is its maximum opening height, and the maximum opening height should meet the following conditions:

[0006]

[0007] in, H is the height of the steel plate; L is the span of the steel plate; h 上下 It is the maximum height of the upper and lower arc openings of the embedded steel plate; h 左右 It is the maximum height of the two arc openings on the left and right of the embedded steel plate.

[0008] Furthermore, the horizontal H-shaped steel frame and the vertical H-shaped steel frame form a rectangular steel frame.

[0009] Furthermore, bolt holes for setting bolts are reserved on the concrete slab; the diameter of the bolt holes is larger than the diameter of the bolts on the arc-shaped opening steel plate.

[0010] Furthermore, the arc-shaped opening steel plate has a thickness of 3 to 6 mm.

[0011] Furthermore, the concrete slab is a precast concrete slab, and a gap of 10 to 20 mm is reserved between the concrete slab and the horizontal H-shaped steel frame and the vertical H-shaped steel frame according to the height of the shear wall to prevent the concrete slab from being damaged by premature contact and extrusion with the surrounding frame.

[0012] Furthermore, the diameter of the bolt hole on the concrete slab is 1-2 mm larger than the diameter of the bolt head.

[0013] Furthermore, the length of the bolt inserted into the bolt hole of the concrete slab is greater than 1 / 2 of the thickness of the concrete slab, and a double-cap bolt is used, one side of which is welded to the arc-shaped opening steel plate, and the other side is buckled on the bolt hole of the concrete slab.

[0014] Furthermore, the positions of the reinforcement in the concrete slab are staggered with the bolt holes and the arc-shaped openings, so as to ensure that the bolt holes and bolt positions of the concrete slab are installed in place.

[0015] Furthermore, the concrete slab is the first line of defense against earthquakes: since the tensile strength of concrete is lower than its compressive strength, oblique cracks first appear in the concrete, and as the load increases, the cracks gradually develop until the concrete stops working; The arc-shaped opening steel plate is the second anti-seismic line: the arc-shaped opening steel plate forms an oblique tension belt in the middle and corner areas, and the arc-shaped opening can reduce the additional bending moment of the oblique tension belt on the horizontal H-shaped steel frame and the vertical H-shaped steel frame; at the same time, the arch effect formed by the arc-shaped opening makes part of the internal force exist in the form of pressure, weakening part of the oblique tension effect; in addition, the arc-shaped opening can save material consumption and meet the requirements for laying pipeline holes on the shear wall; The rectangular steel frame formed by the horizontal H-shaped steel frame and the vertical H-shaped steel frame constitutes the third earthquake-resistant defense line.

[0016] The construction method of the arc-shaped opening steel plate concrete sandwich shear wall adopts the following steps: Step 1: Position and mark, use a steel ruler and ink fountain to mark according to the drawing to determine the position of the arc opening on the steel plate; Step 2: Open the steel plate in an arc shape to form an arc-shaped opening steel plate, and grind the section of the arc-shaped opening position to make it smooth after opening; Step 3: Remove rust and dust from the surface of the curved opening steel plate; Step 4: Weld the nail cap on one side of the bolt to the arc-shaped opening steel plate; Step 5: Hang the concrete slab on the curved opening steel plate by means of bolts; Step 6: Weld a horizontal H-shaped steel frame in the horizontal direction of the arc-shaped opening steel plate, and weld a vertical H-shaped steel frame in the vertical direction to form an arc-shaped opening steel plate concrete sandwich shear wall.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The arc-shaped opening steel plate concrete sandwich shear wall of the present invention has three anti-seismic lines, namely concrete, steel plate and H-shaped steel frame, with clear force transmission path, strong anti-seismic ability and easy recovery after earthquake. The steel plate of the arc-shaped opening steel plate concrete sandwich shear wall of the present invention adopts an arc-shaped opening form. The arc-shaped curve transition of the edge of the steel plate is smooth, which can effectively avoid stress concentration. The connection between the steel plate and the frame is weakened by the arc-shaped opening, and the additional bending moment effect of the steel plate on the steel frame is reduced. The arc-shaped opening form has a reasonable arch axis shape, so that the steel plate can play an arch effect, that is, part of the internal force exists in the form of pressure, reducing the tensile stress of the steel plate. The arc-shaped opening form saves material consumption and meets the requirements of opening holes for laying pipelines on the shear wall while ensuring the structural strength.

[0018] The arc-shaped opening steel plate concrete sandwich shear wall of the present invention is an assembled steel plate concrete composite shear wall, which is simple and convenient to construct. It can be directly transported to the construction site for assembly after being produced in a prefabricated component factory, has high construction efficiency, and reduces construction wet operations.

[0019] Compared with the traditional steel plate concrete composite shear wall, the present invention adds a steel frame. On the basis of ensuring that the four corners of the steel plate are connected to the steel frame, parts of the steel plate are cut off on the four sides to form an arc-shaped opening. The arc-shaped opening sandwich shear wall has the characteristics of simple and fast construction and high earthquake resistance, and can realize the green, low-carbon, assembled, energy-saving and easy recovery of the wall after the earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the arc-shaped opening steel plate concrete sandwich shear wall of the present invention; Figure 2 It is a structural schematic diagram of different bolt arrangements of the arc-shaped opening steel plate concrete sandwich shear wall of the present invention; Figure 3 for Figure 2 AA section view; Figure 4 for Figure 2 BB cross-section diagram; Figure 5 It is a schematic diagram of the diagonal tension belt of the arc-shaped opening steel plate of the present invention. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1-5 The present invention is further described in detail with specific implementations to facilitate a clear understanding of the present invention, but they do not constitute a limitation on the present invention.

[0022] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Example 1 As attached Figure 1-5 As shown, the arc-shaped opening steel plate concrete sandwich shear wall of this embodiment includes an arc-shaped opening steel plate 1, a concrete plate 2, a horizontal H-shaped steel frame 3, a vertical H-shaped steel frame 4 and studs 5. The horizontal H-shaped steel frame 3 and the vertical H-shaped steel frame 4 form a rectangular steel frame.

[0025] like Figure 1As shown, the upper and lower sides of the arc-shaped open steel plate 1 are welded with horizontal H-shaped steel frames 3, and the left and right sides are welded with vertical H-shaped steel frames 4. Bolts 5 are welded on the arc-shaped open steel plate 1. There are two concrete slabs 2, which are hung on the arc-shaped open steel plate 1 through the front and rear sides of the bolts 5. The arc-shaped open steel plate 1 is sandwiched between the two concrete slabs 2 to form a sandwich shear wall structure. Bolt holes 8 for setting bolts 5 are reserved on the concrete slab 2. The diameter of the bolt hole 8 is larger than the diameter of the bolt 5 on the arc-shaped open steel plate 1. The bolts 5 are evenly arranged and welded on the arc-shaped open steel plate 1.

[0026] Among them, Figure 5 As shown, the arc-shaped opening 6 in the arc-shaped opening steel plate 1 is arranged in the middle of the four sides of the arc-shaped opening steel plate 1 and is half of the length of the corresponding side, so as to reduce the stress concentration phenomenon of the arc-shaped opening steel plate 1.

[0027] like Figure 5 As shown, two diagonal tension bands 7 are formed on the arc-shaped opening steel plate 1, and the boundary line of the diagonal tension band 7 is a line formed by the opposite end points of the distal ends of the adjacent arc-shaped openings 6. The boundary line of the diagonal tension band 7 is tangent to the arc-shaped opening 6 at the end point, that is, the angle between the boundary line and the arc radius R of the arc-shaped opening 6 is 90°. In addition, the height h of the arc-shaped opening 6 is its maximum opening height, and the maximum opening height should meet the following conditions:

[0028]

[0029] in, H is the height of the steel plate. L is the span of the steel plate. h 上下 It is the maximum height of the upper and lower arc openings of the embedded steel plate and should be less than this maximum height. h 左右 It is the maximum height of the two arc openings on the left and right of the embedded steel plate and should be smaller than this maximum height.

[0030] In this embodiment, Figure 3-4As shown, the arc-shaped opening steel plate 1 is 5 mm thick. The concrete slab 2 is a precast concrete slab, and a 15 mm gap is reserved between it and the horizontal H-shaped steel frame 3 and the vertical H-shaped steel frame 4 according to the height of the shear wall to prevent the concrete slab 2 from being damaged by premature contact and extrusion with the surrounding frames. In addition, the diameter of the bolt hole 8 on the concrete slab 2 is 1 mm larger than the diameter of the bolt head of the bolt 5. The length of the bolt 5 extending into the bolt hole 8 of the concrete slab 2 is greater than 1 / 2 of the thickness of the concrete slab 2, and a double-head bolt is used, one side of which is welded to the arc-shaped opening steel plate 1, and the other side is buckled on the bolt hole 8 of the concrete slab 2. The reinforcement position in the concrete slab 2 is staggered with the bolt hole 8 and the arc-shaped opening 6 to ensure that the bolt hole 8 and the bolt 5 position of the concrete slab 2 are installed in place.

[0031] In this embodiment, the concrete slab 2 is the first line of defense against earthquakes: since the tensile strength of concrete is lower than its compressive strength, oblique cracks first appear in the concrete, and the cracks gradually develop as the load increases until the concrete stops working. The arc-shaped opening steel plate 1 is the second line of defense against earthquakes: the arc-shaped opening steel plate 1 forms an oblique tension belt in the middle and corner areas, and the arc-shaped opening 6 can reduce the additional bending moment of the oblique tension belt on the horizontal H-shaped steel frame 3 and the vertical H-shaped steel frame 4. At the same time, the arch effect formed by the arc-shaped opening 6 makes part of the internal force exist in the form of pressure, weakening part of the oblique tension effect. In addition, the arc-shaped opening 6 can save material usage and meet the requirements for laying pipeline holes on the shear wall. The rectangular steel frame formed by the horizontal H-shaped steel frame 3 and the vertical H-shaped steel frame 4 constitutes the third line of defense against earthquakes.

[0032] Example 2 In this embodiment, a construction method of a curved opening steel plate concrete sandwich shear wall of the above embodiment 1 adopts the following steps: Step 1: Position and mark, use a steel ruler and ink fountain to mark according to the drawing to determine the position of the arc opening 6 on the steel plate.

[0033] Step 2: Open an arc-shaped opening 6 in the steel plate to form an arc-shaped opening steel plate 1, and grind the section of the arc-shaped opening 6 to make it smooth after opening.

[0034] Step 3: Remove rust and dust from the surface of the arc-shaped opening steel plate 1.

[0035] Step 4: Weld the nail cap on one side of the bolt 5 to the arc-shaped opening steel plate 1.

[0036] Step 5: Hang the concrete slab 2 on the arc-shaped opening steel plate 1 through the bolts 5.

[0037] Step 6: Weld a horizontal H-shaped steel frame 3 in the horizontal direction of the arc-shaped opening steel plate 1, and weld a vertical H-shaped steel frame 4 in the vertical direction, so as to form an arc-shaped opening steel plate concrete sandwich shear wall.

[0038] The above is only a preferred embodiment of the present invention, and does not impose any formal limitation on the structure of the present invention. The layout type and the number of uses of the present invention are not limited to this example, and can be optimized and selected according to the actual project. Any modification, equivalent change and decoration of the above embodiment based on the technical principle of the present invention that does not deviate from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Arc-shaped opening steel plate concrete sandwich shear wall, characterized by: It comprises an arc-shaped opening steel plate (1), a concrete plate (2), a horizontal H-shaped steel frame (3), a vertical H-shaped steel frame (4), and bolts (5); Horizontal H-shaped steel frames (3) are welded to the upper and lower sides of the arc-shaped open steel plate (1), and vertical H-shaped steel frames (4) are welded to the left and right sides; the bolts (5) are welded to the arc-shaped open steel plate (1); The concrete slabs (2) are two pieces, which are hung on the arc-shaped open steel plate (1) at the front and rear sides through the bolts (5), and the arc-shaped open steel plate (1) is sandwiched between the two concrete slabs (2) to form a sandwich shear wall structure; in: The arc-shaped opening (6) in the arc-shaped opening steel plate (1) is arranged in the middle of the four sides of the arc-shaped opening steel plate (1) and is half the length of the corresponding side, so as to reduce the stress concentration phenomenon of the arc-shaped opening steel plate (1); A diagonal tension band (7) is formed on the arc-shaped opening steel plate (1), and the boundary line of the diagonal tension band (7) is a line formed by the opposite end points of the adjacent arc-shaped openings (6); the boundary line of the diagonal tension band (7) is tangent to the arc-shaped opening (6) at the end point, that is, the angle between the boundary line and the arc radius R of the arc-shaped opening (6) is 90°. In addition, the height h of the arc-shaped opening (6) is its maximum opening height, and the maximum opening height should meet the following conditions: in, H is the height of the steel plate; L is the span of the steel plate; h 上下 It is the maximum height of the upper and lower arc openings of the embedded steel plate; h 左右 It is the maximum height of the two arc openings on the left and right of the embedded steel plate.

2. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The horizontal H-shaped steel frame (3) and the vertical H-shaped steel frame (4) form a rectangular steel frame.

3. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The concrete slab (2) is provided with a bolt hole (8) for arranging the bolt (5); the diameter of the bolt hole (8) is larger than the diameter of the bolt (5) on the arc-shaped opening steel plate (1).

4. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The arc-shaped opening steel plate (1) has a thickness of 3 to 6 mm.

5. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The concrete slab (2) is a prefabricated concrete slab, and a gap of 10 to 20 mm is reserved between the concrete slab and the horizontal H-shaped steel frame (3) and the vertical H-shaped steel frame (4) according to the height of the shear wall, so as to prevent the concrete slab (2) from being damaged by premature contact and compression with the surrounding frames.

6. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The diameter of the bolt hole (8) on the concrete slab (2) is 1-2 mm larger than the diameter of the bolt head (5).

7. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The length of the bolt (5) inserted into the bolt hole (8) of the concrete slab (2) is greater than 1 / 2 of the thickness of the concrete slab (2), and a double-head bolt is used, one side of which is welded to the arc-shaped opening steel plate (1), and the other side is snap-fitted to the bolt hole (8) of the concrete slab (2).

8. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1 is characterized in that: The positions of the reinforcement in the concrete slab (2) are staggered with the positions of the bolt holes (8) and the arc-shaped openings (6), thereby ensuring that the bolt holes (8) and the bolts (5) of the concrete slab (2) are installed in place.

9. The arc-shaped opening steel plate concrete sandwich shear wall according to claim 1, characterized in that: The concrete slab (2) is the first line of defense against earthquakes: since the tensile strength of concrete is lower than its compressive strength, oblique cracks first appear in the concrete, and the cracks gradually develop as the load increases until the concrete stops working; The arc-shaped opening steel plate (1) is the second anti-seismic defense line: the arc-shaped opening steel plate (1) forms an oblique tension belt in the middle and corner areas, and the arc-shaped opening (6) can reduce the additional bending moment effect of the oblique tension belt on the horizontal H-shaped steel frame (3) and the vertical H-shaped steel frame (4); at the same time, the arch effect formed by the arc-shaped opening (6) makes part of the internal force exist in the form of pressure, thereby reducing part of the oblique tension effect; In addition, the arc-shaped opening (6) can save material usage and meet the requirements for laying pipeline holes on the shear wall; The rectangular steel frame formed by the horizontal H-shaped steel frame (3) and the vertical H-shaped steel frame (4) constitutes the third earthquake-resistant defense line.

10. A construction method of an arc-shaped opening steel plate concrete sandwich shear wall, which adopts the arc-shaped opening steel plate concrete sandwich shear wall according to any one of claims 1 to 9, characterized in that: Use the following steps: Step 1: Positioning and marking, using a steel ruler and ink fountain marking tool to mark out the lines according to the drawing, and determine the position of the arc opening (6) on the steel plate; Step 2: Opening an arc-shaped opening (6) on the steel plate to form an arc-shaped opening steel plate (1), and after opening, grinding the cross-section of the arc-shaped opening (6) to make it smooth; Step 3: performing surface rust and dust removal treatment on the curved opening steel plate (1); Step 4: Welding the nail cap on one side of the bolt (5) to the arc-shaped opening steel plate (1); Step 5: Hang the concrete slab (2) on the arc-shaped opening steel plate (1) by means of bolts (5); Step 6: Weld a horizontal H-shaped steel frame (3) in the horizontal direction of the arc-shaped opening steel plate (1), and weld a vertical H-shaped steel frame (4) in the vertical direction, thereby forming an arc-shaped opening steel plate concrete sandwich shear wall.

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