CN102704596A - Combined shear wall with concrete wrapped steel plate dense beam embedded between profile steel overlapped columns and externally wrapping concrete and manufacturing method - Google Patents

Abstract

The invention provides a combined shear wall with steel plate dense beams embedded between profile steel overlapped columns and externally wrapping concrete and a manufacturing method, belonging to the field of steel-concrete combined shear walls. The combined shear wall comprises profile steel overlapped side frame columns, profile steel core columns, steel plate dense beams and a reinforced concrete shear wall body, wherein the cross section of the wall is I-shaped. Profile steel overlapped side frame columns are arranged at two ends of the reinforced concrete shear wall body; a plurality of profile steel core columns in parallel are arranged between the profile steel overlapped side frame columns; horizontal steel plate dense beams in parallel are arranged between the profile steel overlapped side frame columns and the profile steel core columns and between the profile steel core columns along the height direction of the reinforced concrete shear wall body; the steel plate dense beams, the profile steel overlapped side frame columns and the profile steel core columns are welded at the cross line; the shear wall reinforcing steel bars are strapped; and the concrete is cast so as to form the combined shear wall with steel plate dense beams embedded between the profile steel overlapped columns and externally wrapping concrete. According to the combined shear wall, the bearing ability is improved; with multiple defense lines, the ductility and the energy consumption property of the shear wall are improved and the quake resistance is superior; and the combined shear wall is convenient to construct and easy to operate and can be used in high-stored or large complex multilayered buildings.

Description

Composite Shear Wall with Steel Plate Dense Beam Wrapped with Concrete Outer Wall and Its Practice

technical field

The invention relates to a composite shear wall with steel plates embedded in dense beams and a concrete composite shear wall and its method in the invention, which belongs to a new type of steel-concrete composite shear wall and its method for an anti-seismic structure that consumes the energy input from the earthquake and improves the anti-seismic performance of the structure. The manufacturing method belongs to the field of steel-concrete composite shear walls.

Background technique

At present, with the development of social production and the needs of human activities, there are more and more modern high-rise and super high-rise buildings, and the requirements for the seismic performance of shear walls are also getting higher and higher. Shear walls and core tubes composed of shear walls are the most critical vertical system for high-rise buildings to resist earthquakes, and they bear most of the seismic action of the structure. The existing ordinary reinforced concrete shear walls have poor deformation capacity and ductility under earthquake action, and are prone to brittle failure, which directly affects the seismic performance of high-rise buildings, which is very unfavorable to the seismic performance of the overall structure.

The shear wall is the core anti-lateral force component in the high-rise building structure, and its seismic performance plays a vital role in the safety and reliability of the high-rise building. The development of shear walls with good seismic performance is the key technology of building seismic design. In order to improve the seismic performance of shear walls, there are more and more studies on composite shear walls, such as various types of slotted shear walls and composite shear walls. At present, there are two main researches on composite shear walls. Two types: one is "composite wall panel shear wall", the wall panel is composed of steel plate and concrete wall panel; the other is "combined shear wall with frame", the wall panel of this kind of composite shear wall is generally Reinforced concrete, while the frame is made of steel concrete. In addition, the wall panel can also be made of steel plate, while the frame can be made of reinforced concrete; the frame and composite wall panel can also be combined together.

The steel-concrete composite shear wall has the advantages of steel members and concrete members at the same time, which can effectively increase the strength and ductility of the members, reduce the cross-sectional size of the members, and have good fire performance. The steel-concrete composite shear wall has the characteristics of large elastic initial stiffness, large deformation capacity, good plastic performance, stable hysteretic characteristics, etc., and can effectively overcome the self-heaviness of ordinary reinforced concrete shear walls and the difficulty of corner concrete. Cracking, brittle and other shortcomings, it is a very promising high-rise lateral force resistance system.

Contents of the invention

The purpose of the present invention is to provide a new type of steel-concrete composite shear wall that consumes earthquake input structural energy and improves the seismic performance of the structure. It is mainly used in the shear wall structure or cylinder structure of high-rise buildings or large complex multi-story buildings. Solve the problems of insufficient bearing capacity, ductility and energy consumption under earthquake action.

The technical scheme that the present invention adopts is as follows:

Composite shear walls with steel plate dense beams embedded between steel laminated columns and concrete composite shear walls, which include steel laminated frame columns 1, steel core columns 2, steel plate dense beams 3 and reinforced concrete shear walls; two reinforced concrete shear walls The steel laminated frame column 1 is arranged at the end; the size of the steel laminated frame column 1 along the thickness direction of the reinforced concrete shear wall is larger than the wall thickness; the upper and lower ends of the steel laminated frame column 1 are respectively provided with upper frame beams 8 and the lower frame beam 7; the steel core column 2 is arranged parallel to the direction of the steel superimposed frame column 1 inside the reinforced concrete shear wall; A horizontally parallel steel plate dense beam 3 is set along the height direction of the reinforced concrete shear wall; steel plate dense beam 3 is welded on the intersection line of the section steel laminated frame column 1 and section steel core column 2; Steel plate girder series whose spacing is not greater than the beam height; the steel bar connecting ribs 9 used to fix the horizontally distributed steel bars 4 of the wall are welded on the steel plate of the laminated steel frame column 1; The reinforcement mesh composed of horizontal distribution reinforcement bars 4 and vertical distribution reinforcement reinforcement bars 5 is used to connect the reinforcement mesh on both sides through the gap 10 of the steel plate dense beam 3 with tension connection reinforcement bars 6; Combined columns are embedded with steel plate dense beams and outsourced concrete composite shear walls. The size of the steel core column 2 in the thickness direction of the reinforced concrete shear wall is smaller than the thickness of the wall; the size of the steel laminated frame column 1 in the thickness direction of the reinforced concrete shear wall is larger than the thickness of the concrete wall; The strength of the steel should not be greater than the steel strength of the laminated steel frame column 1 and the steel core column 2 .

The section steel in the section steel laminated frame column 1 adopts I-beams and channel steels, and vertical steel bars and stirrups are arranged outside the section steel to form the section steel composite frame column.

The shaped steel core column 2 adopts I-beam and channel steel, and its size in the thickness direction of the reinforced concrete shear wall is smaller than the thickness of the wall.

The steel plate dense beam 3 is arranged in parallel between the section steel laminated frame column 1 and the section steel core column 2 and between the section steel core columns 2 along the height direction of the reinforced concrete shear wall; the steel plate dense beam 3 and the section steel laminated frame column 1 1. Welding is carried out on the intersection line of section steel core column 2; its strength is not greater than the strength of the steel plate of section steel laminated frame column 1 and section steel core column 2; its thickness is lower than the thickness of the steel plate of section steel core column 2; its aspect ratio is less than or equal to 1, The net distance between the upper and lower adjacent steel plate dense beams 3 is not greater than the beam height.

The steel plate of the reinforcing bar connecting rib 9 adopts the steel plate with the same strength as the steel plate in the section steel laminated frame column 1, and should be welded with the steel plate of the section steel laminated frame column 1.

The horizontally distributed steel bars 4 are welded to the steel bar vertical connecting ribs 9 provided on the superimposed steel frame column 1; the upper and lower ends of the vertically distributed steel bars 5 extend into the upper frame beam 8 and the lower frame beam 7 respectively for rigid connection.

The tie reinforcement 6 connects the reinforcement mesh composed of the horizontally distributed reinforcement 4 and the vertically distributed reinforcement 5 on both sides of the wallboard through the gap 10 between the upper and lower steel plate dense beams 3, or passes through the middle of the steel plate dense beam 3 The reserved round holes in the position connect the reinforcement mesh on both sides.

The upper frame beam 8 and the lower frame beam 7 are reinforced concrete beams, or steel concrete beams with a rectangular cross section, and the concrete is poured on site.

The invention combines the advantages of the composite steel column, the reinforced concrete wall panel and the steel plate dense beam, while giving full play to the anti-seismic effect of the composite steel column and the reinforced concrete wall panel, it also gives full play to the stronger seismic energy consumption capacity of the steel dense beam. The steel plate dense beam of the new composite shear wall has the following stress and functional characteristics: the energy dissipation unit of the steel plate dense beam can fully exert the plastic seismic energy dissipation capacity of mild steel through its in-plane bending deformation and shear deformation; After the reinforced concrete wall panels are used on both sides of the dense beam, the concrete wall panels effectively restrain the out-of-plane buckling of the steel dense beam, which can effectively consume the seismic input structure of the steel dense beam through in-plane plastic deformation in a longer period of time. energy and improve the seismic performance of the structure; at the same time, the gap between the steel plate dense beams can be used as a structural joint through which the reinforced concrete wall panels on both sides of the steel plate dense beams pass through the tensioned steel bars. The steel plate dense beams form a whole, work together and complement each other's advantages; due to the existence of steel plate dense beams, the cracking and crack development of the concrete wall panels on both sides are delayed, and the seismic ductility of the concrete wall panels is improved.

The composite shear wall with embedded steel plate dense beams and outer concrete composite shear wall between the laminated steel columns of the invention has multiple anti-seismic defense lines under the action of earthquake. After the reinforced concrete wall panels are used on both sides of the steel core column and the steel plate dense beam, the out-of-plane instability of the steel plate is well suppressed, and the vertical bearing capacity of the concrete wall panel as the first line of defense against earthquakes is greatly improved. Ductility and energy dissipation capacity. When the reinforced concrete wall panels are damaged in the earthquake, the truss structure formed by the steel plate dense beams and the internal steel core columns, upper and lower frame beams, and steel composite frame columns is a geometrically invariant system, thereby maintaining the overall stability of the structure At this time, under the action of external load, the steel plate dense beam as the second line of defense for shear bearing capacity begins to play a role. Because its strength is lower than that of the steel core column steel plate, it will yield before the steel core column, and it will be subject to the shear force The effect of the main load consumes the seismic energy until it yields; after the steel plate dense beam yields, the structure begins to become a frame system composed of steel core columns, frame beams and columns to continue to bear the load. This is the first composite shear wall Three lines of defense. Compared with ordinary concrete-filled steel tube frame shear walls and steel plate shear walls, the bearing capacity is improved, the attenuation of bearing capacity and stiffness is slower, and the later seismic performance is relatively stable. Multiple defense lines also improve the ductility and energy dissipation performance of the shear wall.

Since the shear wall is the core anti-lateral force component of the building structure, the seismic capacity of the shear wall is improved, and the seismic capacity of the whole structure is also improved. When the building encounters a strong earthquake, its earthquake damage can be reduced and its collapse can be prevented. .

Description of drawings

Figure 1 is a diagram of the steel and reinforcement of the composite shear wall with steel plates embedded in dense beams and outsourced concrete between the laminated steel columns

Figure 2 is a schematic diagram of the facade of the composite shear wall

Figure 3 is a horizontal section view of the composite shear wall

Description of the attached drawing code: 1-shaped steel laminated frame column, 2-shaped steel core column, 3-steel plate dense beam, 4-horizontal distributed steel bar, 5-vertical distributed steel bar, 6-tie bar, 7-lower frame beam, 8-upper frame beam, 9-rebar connection rib, 10-gap.

Detailed ways

The present invention will be further described below in conjunction with specific embodiment:

Figure 1, Figure 2 and Figure 3 show the structural diagrams of a structural unit of a composite shear wall with steel plate dense beams embedded between steel laminated columns and concrete composite shear walls.

The fabrication sequence of the composite shear wall with steel plate dense beams embedded between the above-mentioned section steel laminated columns and concrete composite shear wall is as follows:

1) Fabricate the profiled steel laminated frame column 1 and profiled steel core column 2; weld the steel bar connecting rib 9 at the end of the wall horizontally distributed reinforcement 4 on the steel plate of the profiled steel laminated frame column 1;

2) Bind the steel bars of the reinforced concrete foundation beam of the shear wall or the lower frame beam 7, and insert the section steel laminated frame column 1, section steel core column 2, and vertically distributed reinforcement bars 5 of the shear wall into the reinforcement cage of the bottom frame beam 7, The concrete of the lower frame beam 7 is poured, and after the concrete is cured and consolidated, the lower frame beam 7 is rigidly connected to the bottom of the section steel superimposed frame column 1, section steel core column 2, and vertically distributed reinforcement bars 5 of the shear wall;

3) Make steel plate dense beams 3, and arrange parallel steel plate dense beams 3 along the height direction of the reinforced concrete shear wall between the section steel laminated frame column 1 and the section steel core column 2 and between the section steel core columns 2; Welding is carried out on the intersection line of section steel laminated frame column 1 and section steel core column 2; the aspect ratio of steel plate dense beam 3 is not greater than 1, and the clear distance between the upper and lower steel plate dense beams 3 is not greater than the beam height of steel plate dense beam 3;

4) On both sides of the shaped steel core column 2 and the steel plate dense beam 3, a reinforcement mesh composed of horizontally distributed steel bars 4 and vertically distributed steel bars 5 is arranged, and the tie bars 6 pass through the gap 10 of the upper and lower steel plate dense beams 3 to connect the steel bars on both sides. The steel mesh is pulled together, or the steel mesh on both sides is pulled together through the reserved round hole in the middle of the steel plate dense beam 3;

5) Make the upper frame beam 8, insert the frame steel superimposed frame column 1, the steel core column 2 and the vertically distributed steel bars 5 of the wallboard into the upper frame beam 8 for reliable connection;

6) Leave the thickness of the concrete protective layer through the cement pads on both sides of the shear wall panel, and then support the formwork for pouring concrete;

7) Concrete is poured at the 8 places of section steel laminated frame column 1, section steel core column 2, shear wall panel, and upper frame beam.

The above is a typical embodiment of the present invention, and the practice of the present invention is not limited thereto.

Claims (8)

1. The composite shear wall with steel plate dense beams embedded between the steel laminated columns and the outer concrete composite shear wall, the wall section is I-shaped, which includes the steel laminated frame columns (1), steel core columns (2), and steel plate dense beams (3) and a reinforced concrete shear wall; it is characterized in that: a steel laminated frame column (1) is arranged at both ends of the reinforced concrete shear wall; the size of the steel laminated frame column (1) along the thickness direction of the reinforced concrete shear wall greater than the thickness of the wall; set the upper and lower frame beams (8) and lower frame beams (7) at the upper and lower ends of the section steel laminated frame column (1); and inside the reinforced concrete shear wall parallel to the section steel laminated frame Set the steel core column (2) in the direction of the column (1); between the steel laminated frame column (1) and the steel core column (2) and between the steel core columns (2) along the height direction of the reinforced concrete shear wall Install horizontal and parallel steel plate dense beams (3); steel plate dense beams (3) are welded on the intersection line of steel plate laminated frame columns (1) and shaped steel core columns (2); steel plate dense beams (3) are the upper and lower steel plate beams Steel plate girder series with clear distance not greater than the beam height; steel bar connecting ribs (9) used to fix the horizontally distributed steel bars (4) of the wall are welded on the steel plate of the profile steel laminated frame column (1); The two sides of the steel plate dense beam (3) are equipped with a reinforcement mesh composed of horizontally distributed steel bars (4) and vertically distributed steel bars (5), and the tie bars (6) pass through the gap (10) of the steel plate dense beam (3) The steel mesh on both sides is pulled together; the formwork is poured and rammed to form the concrete, that is, the composite shear wall with steel plate dense beams embedded between the steel composite columns and the outer concrete composite shear wall is formed; the steel core column (2) is in the direction of the thickness of the reinforced concrete shear wall The size of the steel laminated frame column (1) in the thickness direction of the reinforced concrete shear wall is greater than the thickness of the concrete wall; the steel strength of the steel plate dense beam (3) should not be greater than that of the steel laminated frame column (1) The steel strength of the shaped steel core column (2). 2. According to claim 1, the composite shear wall with steel plates embedded in dense beams and outsourced concrete composite shear walls between the laminated steel columns is characterized in that: the steel in the laminated steel frame columns (1) adopts I-beams and channel steels, Vertical steel bars and stirrups are arranged outside the section steel to form a composite frame column of section steel. 3. According to claim 1, the composite shear wall with steel plates embedded in dense beams and outsourcing concrete composite shear walls between the laminated steel columns is characterized in that: the core column of shaped steel (2) adopts I-beams and channel steels. 4. According to claim 1, the composite shear wall with steel plate dense beams embedded between the steel laminated columns and the outer concrete composite shear wall is characterized in that: the steel plate dense beams (3) are connected between the steel laminated frame columns (1) and the steel core columns The spaces between (2) and the steel core columns (2) are arranged in parallel along the height direction of the reinforced concrete shear wall; the steel plate dense beam (3) and the steel laminated frame column (1) and the steel core column (2) meet on the line Welding is performed; the strength of the steel plate dense beam (3) is not greater than the strength of the steel plates in the laminated steel frame column (1) and the steel core column (2); the thickness of the steel plate dense beam (3) is lower than that of the steel core column (2) The thickness of the steel plate; the aspect ratio of the steel plate dense beam (3) is less than or equal to 1, and the net distance between the upper and lower adjacent steel plate dense beams (3) is not greater than the beam height of the steel plate dense beam (3). 5. According to claim 1, the composite shear wall with steel plates embedded in dense beams and outsourced concrete composite shear walls between the superimposed steel columns, is characterized in that: the steel plates of the connecting ribs (9) of the steel bars are made of the steel plates in the superimposed frame columns (1) of the steel bars. The steel plate is steel with the same strength and shall be welded with the steel plate of the superimposed frame column (1) of the section steel. 6. According to claim 1, the composite shear wall with embedded steel plate dense beams and outsourced concrete composite shear wall between the laminated steel columns is characterized in that: the horizontally distributed reinforcement (4) and the reinforcement provided on the composite frame column (1) of the composite steel The vertical connecting ribs (9) are welded; the upper and lower ends of the vertically distributed steel bars (5) respectively extend into the upper frame beam (8) and the lower frame beam (7) for rigid connection. 7. According to claim 1, the composite shear wall with steel plates embedded in dense beams and outsourcing concrete composite shear walls between laminated steel columns is characterized in that: the upper frame beam (8) and the lower frame beam (7) are reinforced concrete beams, or Reinforced concrete beams with a rectangular cross-section, concrete poured on site. 8. According to any one of claim 1 to claim 7, the method of composite shear walls embedded with steel plate dense beams and outsourcing concrete composite shear walls between composite steel composite columns is characterized in that: the production sequence is as follows: 1) Manufacture the profiled steel laminated frame column (1) and profiled steel core column (2); weld the steel bar connecting ribs (9) at the ends of the horizontally distributed reinforcement bars (4) of the wall on the steel plate of the profiled steel laminated frame column (1) ; 2) Bind the steel bars of the reinforced concrete foundation beam of the shear wall or the lower frame beam (7), and insert the section steel laminated frame column (1), section steel core column (2), and the vertically distributed reinforcement bars of the shear wall (5) into the lower In the reinforcement cage of the frame beam (7), pour the concrete of the frame beam (7), and after the concrete is cured and consolidated, the frame column (1), steel core column (2), The bottom of the vertically distributed reinforcing bars (5) of the shear wall is rigidly connected; 3) Make steel plate dense beams (3), and arrange parallel steel plate dense beams along the height direction of the reinforced concrete shear wall between the laminated steel frame columns (1) and the steel core columns (2) and between the steel core columns (2). Beam (3); the steel plate dense beam (3) is welded on the intersection line of the steel laminated frame column (1) and the steel core column (2); the height-width ratio of the steel plate dense beam (3) is not greater than 1, and the upper and lower steel plate dense The clear distance between the beams (3) is not greater than the beam height of the steel plate dense beams (3); 4) On both sides of the shaped steel core column (2) and the steel plate dense beam (3), a reinforcement mesh composed of horizontally distributed steel bars (4) and vertically distributed steel bars (5) is arranged, and the tie bars (6) pass through the upper and lower steel plates The gap (10) of the dense beam (3) connects the reinforcement mesh on both sides, or passes through the reserved round hole in the middle of the dense steel beam (3) to connect the reinforcement mesh on both sides; 5) Make the upper frame beam (8), insert the frame steel laminated frame column (1), steel core column (2) and vertically distributed steel bars (5) of the wallboard into the upper frame beam (8) for reliable connection; 6) Leave the thickness of the concrete protective layer through the cement pads on both sides of the shear wall panel, and then support the formwork for pouring concrete; 7) Concrete is poured at the laminated steel frame columns (1), steel core columns (2), shear wall panels, and upper frame beams (8). After forming, concrete is formed between the laminated steel columns with dense beams embedded in steel plates Composite shear walls.

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