CN102995789B - Built-in section steel column-lattice steel beam-mesh steel support concrete wall body and manufacturing method - Google Patents

Abstract

The built-in steel column-lattice steel beam-mesh steel braced concrete wall and its method belong to the field of steel-concrete composite shear walls, including steel laminated frame columns, steel core columns, lattice steel beams, mesh steel braces and Reinforced concrete shear walls. Laminated steel frame columns are set at both ends of the shear wall; parallel steel core columns are set in between; lattice steel beams and mesh steel braces are used between the laminated steel frame columns and steel core columns and between various steel core columns Connection; binding shear wall reinforcement; pouring concrete to form a built-in steel column-lattice steel beam-network steel braced concrete wall. Compared with ordinary concrete-filled steel tube frame shear walls and steel plate shear walls, the bearing capacity is improved, the bearing capacity and stiffness decay slowly, and the later seismic performance is stable; The ductility and energy dissipation performance of the shear wall is improved, and the seismic performance is superior; the construction of the steel structure is convenient, and it can be used in the seismic design of large complex high-rise buildings.

Description

Built-in steel column-lattice steel beam-mesh steel braced concrete wall and its method

technical field

The invention relates to a built-in steel column-lattice steel beam-reticular steel braced concrete wall and its method, and belongs to a new type of steel-concrete composite shear wall that consumes earthquake input structural energy and improves the anti-seismic performance of the structure and its manufacture method.

Background technique

The shear wall structure can effectively reduce the lateral displacement due to its high stiffness against lateral displacement and has certain ductility, so it has gradually become a system widely used in modern high-rise buildings. The shear wall has high rigidity and high strength, which can effectively reduce lateral movement, and generally can well meet the seismic requirements under frequent earthquakes. However, in the case of a large earthquake, due to the large peak value of seismic acceleration and the large input seismic energy, the shear wall is required to have better energy dissipation capacity and better ductility.

The emergence of steel-concrete composite shear walls not only satisfies the above requirements, but also can effectively overcome the shortcomings of reinforced concrete shear walls, such as heavy weight, easy cracking and brittleness of concrete at corners, and increases the strength of the shear walls. The lateral bending stiffness has become a very promising high-rise lateral force system. However, in general steel-concrete composite shear walls, the concrete part cracks earlier. After the concrete is crushed and damaged, the vertical bearing capacity of the entire wall will be greatly reduced, and the destruction of other lines of defense will also be accelerated. , the energy dissipation and ductility of the entire structure are also reduced, resulting in the weakening and reduction of the seismic performance of the shear wall structure.

Contents of the invention

In order to solve the problem of insufficient bearing capacity, ductility and energy consumption of shear walls under earthquake action, the present invention provides a new type of steel-concrete composite shear wall with multi-components, multi-level dispersion and consumption of earthquake input structural energy, and improved structural seismic performance , mainly used for shear wall structures or cylinder structures of high-rise buildings or large complex multi-storey buildings.

The technical solution is as follows:

Built-in shaped steel column-lattice steel beam-network steel braced concrete wall, including section steel laminated frame column 1, section steel core column 2, lattice steel beam 3, mesh steel brace 4 and reinforced concrete shear wall; The cross-section of the combined wall is straight, and the steel structure system of "shaped steel column-lattice steel beam-network steel brace" is hidden in the reinforced concrete shear wall.

In the "steel column-lattice steel beam-reticular steel brace" steel frame system, the steel laminated frame column 1, steel core column 2, lattice steel beam 3 and reticular steel brace 4 are rigidly connected, The rigid connection includes welding.

The lattice steel girder 3 can be a plane truss or a space truss; it is made of steel, and its strength is not greater than the steel strength of the section steel laminated frame column 1 and the section steel core column 2; when the section steel laminated frame column 1 and The 2 steel core columns and the 2 steel core columns are arranged in parallel along the height; the lattice steel beam 3 is welded on the intersection line of the steel laminated frame column 1 and the steel core column 2; the height-span ratio is greater than or equal to 1.

The reticulated steel brace 4 is made of steel, and is arranged at intervals along the height of the reinforced concrete shear wall and the lattice steel beam 3. The inclination angle of the steel in the reticulated steel brace 4 is between 45 degrees and 60 degrees, and is superimposed on the section steel The rigid connection between the frame column 1 and the shaped steel core column 2 includes welding.

The profiled steel laminated frame column 1 is a steel-concrete composite column formed by adding longitudinal bars and stirrups around the profiled steel column and then pouring concrete; the section of the profiled steel laminated frame column 1 is I-shaped, cross-shaped, or duplex-shaped. and other cross-sectional forms, the dimension in the thickness direction of the reinforced concrete shear wall is smaller than the wall thickness.

The section of the shaped steel core column 2 is I-shaped, duplex-shaped and other forms; the size of the shaped steel core column 2 in the thickness direction of the reinforced concrete shear wall is smaller than the wall thickness.

The horizontally distributed steel bars 5 of the reinforced concrete shear wall are inserted into the section steel superimposed frame column 1;

The tie bars 7 in the reinforced concrete shear wall pass through the gaps of the lattice steel beams 3 or the mesh steel braces 4 to form a steel mesh sheet composed of horizontally distributed steel bars 5 and vertically distributed steel bars 6 on both sides of the wallboard. Pull up.

The upper frame beam 9 and the lower frame beam or foundation beam 8 are reinforced concrete beams, or steel concrete beams with a rectangular cross-section, and the concrete is poured on site.

The fabrication sequence of the structure of the present invention is as follows:

1) Fabrication of section steel laminated frame column 1 and section steel core column 2;

2) Bind the vertically distributed steel bars 6 of the shear wall, the steel bars of the lower frame beam or the foundation beam 8, and insert the section steel laminated frame column 1, section steel core column 2, and vertically distributed steel bars 6 of the shear wall into the lower frame beam or foundation In the reinforcement cage of the beam 8, pour the concrete of the lower frame beam or the foundation beam 8, and after the concrete is cured and consolidated, make the frame column 1, the steel core column 2, and the shear wall vertically The bottom of the distribution steel bar 6 realizes rigid connection;

3) Fabricate lattice steel beams 3 and mesh steel braces 4, and rigidly connect them with section steel laminated frame columns 1 and section steel core columns 2, which can be realized by welding;

4) On both sides of the "shaped steel column-lattice steel beam-mesh steel brace" steel frame, a steel mesh sheet consisting of horizontally distributed steel bars 5 and vertically distributed steel bars 6 is arranged, and the tie bars 7 are used to pass through the lattice steel The gaps between the beam 3 or the mesh steel brace 4 tie up the reinforcement mesh on both sides;

5) Make the upper frame beam 9 to make reliable rigid connection with the frame steel superimposed frame column 1, the steel core column 2 and the vertically distributed steel bars 6 of the wallboard;

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 for the composite steel frame column 1, shear wall panel, and upper frame beam 9. After forming, a built-in steel column-lattice steel beam-reticular steel-supported concrete wall is formed.

The present invention is a combination of different stress systems—“steel columns-lattice steel beams—reticular steel braces” steel frame system and reinforced concrete shear walls, different materials—the combination of steel and concrete, and different Component form - the combination of lattice structure and solid web is a kind of "triple advantage combined shear wall". While giving full play to the anti-seismic ability of reinforced concrete wall panels, it also makes full use of the anti-seismic and energy-dissipating effect of the "steel column-lattice steel beam-network steel brace" steel frame. The use of lattice steel components saves steel The mass of the shear wall is also reduced, and the input shear wall seismic force is also reduced accordingly. It has the following stress and functional characteristics: the built-in mesh steel brace of the invention can effectively delay the appearance of oblique cracks in the concrete wall, and is conducive to improving the shear bearing capacity and ductility of the concrete wall panel as the first line of defense against earthquakes. As well as the energy dissipation capacity, a part of the pressure borne by the shear wall can also be transferred to the laminated steel frame column and the steel core column, which is beneficial to the load distribution of the shear wall and the column; the laminated steel frame column and the steel core column The existence of the core column reduces the axial compression ratio of the shear wall, and the shear wall can be designed to be thinner, increasing the building area; the mesh steel brace first yields when the steel frame system functions as the second line of defense, through Deformation energy consumption ensures the overall stability of the shear wall skeleton; after that, the lattice steel beams also absorb the earthquake energy one after another, yielding and deforming energy consumption, which protects the stable vertical bearing capacity of the laminated steel frame columns and steel core columns, and also The ductile deformation energy dissipation capacity of the entire shear wall is guaranteed. Therefore, this is another kind of "two-level yield protection shear wall". The superimposed steel frame column, steel core column, lattice steel beam and mesh steel brace constitute the "steel column-lattice steel beam-network steel brace" steel structure skeleton, which is a multi-time super statically determinate multi-unit energy consumption The steel skeleton system will greatly increase the elastic initial stiffness of the composite wall, and ensure that the composite wall has a good later stability, and the seismic performance is greatly improved. After the two sides of the "shaped steel column-lattice steel beam-reticular steel brace" steel frame system are covered with reinforced concrete wall panels, the reinforced concrete wall panels effectively restrain the lattice steel beams, reticular steel braces and steel columns. The out-of-plane buckling of the steel plate enables the steel plate to work effectively in the plane for a longer period of time to resist the energy input by the earthquake; The steel bars tie the steel mesh sheets on both sides of the concrete wall, and the concrete wall panels on both sides and the "steel column-lattice steel beam-network steel brace" steel frame in the middle are combined into a whole to work together. Complementary advantages.

The built-in steel column-lattice steel beam-mesh steel braced concrete wall of the present invention has two anti-seismic defense lines under earthquake action. When the earthquake energy is input, the reinforced concrete wall panel starts to play a role as the first line of anti-seismic defense. The steel frame of "shaped steel column-lattice steel beam-mesh steel brace" delays the appearance of cracks in the concrete wall and improves the concrete wall. The bearing capacity and energy dissipation capacity of the slab part as the first line of defense against earthquakes. As the input earthquake energy increases, the concrete wall cracks and the first line of defense collapses. At this time, the "shaped steel column-lattice steel beam-mesh steel brace" steel skeleton begins to play a role as the second line of defense against earthquakes. The truss structure formed by the "steel column-lattice steel beam-mesh steel brace" steel frame inside the wall and the upper and lower frame beams is a geometrically invariant system, thus maintaining the overall stability of the structure. The lattice steel beams and the mesh steel braces between the lattice steel beams dissipate energy through in-plane deformation, slowing down the bearing capacity and stiffness of the columns and the frame of the shear wall, thereby ensuring the firmness of the second anti-seismic defense line and improving the Seismic performance of shear walls. Compared with ordinary steel plate shear walls, the elastic initial stiffness, bearing capacity and ductility are all improved, the bearing capacity and stiffness decay slower, and the later seismic performance is relatively stable.

The anti-seismic ability of the shear wall, the core anti-lateral force component of the building structure, is improved, which also improves the anti-seismic ability of the structure as a whole. When the building encounters a strong earthquake, it can reduce its earthquake damage and prevent it from collapsing. It can be used for large complex high-rise buildings. earthquake-resistant design of buildings.

Description of drawings

Figure 1 is a steel and reinforcement diagram for the built-in steel column-lattice steel beam-network steel braced concrete wall

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

Figure 3 is a horizontal section view of the shear wall

In the figure: 1-shaped steel laminated frame column, 2-shaped steel core column, 3-lattice steel beam, 4-mesh steel brace, 5-horizontal distribution of reinforcement, 6-vertical distribution of reinforcement, 7-tie reinforcement, 8-lower border beam or foundation beam, 9-upper border beam.

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 built-in steel column-lattice steel beam-network steel-braced concrete wall.

The built-in steel column-lattice steel beam-network steel braced concrete wall, the production sequence is as follows:

1) Fabrication of section steel laminated frame column 1 and section steel core column 2;

2) Bind the vertically distributed steel bars 6 of the shear wall, the steel bars of the lower frame beam or the foundation beam 8, and insert the section steel laminated frame column 1, section steel core column 2, and vertically distributed steel bars 6 of the shear wall into the lower frame beam or foundation In the reinforcement cage of the beam 8, pour the concrete of the lower frame beam or the foundation beam 8, and after the concrete is cured and consolidated, make the frame column 1, the steel core column 2, and the shear wall vertically The bottom of the distribution steel bar 6 realizes rigid connection;

3) Fabricate lattice steel beams 3 and mesh steel braces 4, and rigidly connect them with section steel laminated frame columns 1 and section steel core columns 2, which can be realized by welding;

4) On both sides of the "shaped steel column-lattice steel beam-mesh steel brace" steel frame, a steel mesh sheet consisting of horizontally distributed steel bars 5 and vertically distributed steel bars 6 is arranged, and the tie bars 7 are used to pass through the lattice steel The gaps between the beam 3 or the mesh steel brace 4 tie up the reinforcement mesh on both sides;

5) Make the upper frame beam 9 to make reliable rigid connection with the frame steel superimposed frame column 1, the steel core column 2 and the vertically distributed steel bars 6 of the wallboard;

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 for the composite steel frame column 1, shear wall panel, and upper frame beam 9. After forming, a built-in steel column-lattice steel beam-reticular steel-supported concrete wall is formed.

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

Claims (10)

1. Built-in shaped steel column-lattice steel beam-mesh steel braced concrete wall, including shaped steel laminated frame column (1), shaped steel core column (2), lattice steel beam (3), meshed steel brace ( 4) and reinforced concrete shear wall; it is characterized in that: the cross section of the combined wall is in-line shape, and the steel column-lattice steel beam-network steel brace steel structure system is hidden in the reinforced concrete shear wall; The two ends of the reinforced concrete shear wall are provided with section steel laminated frame columns (1); the upper and lower ends of the section steel laminated frame columns (1) are provided with upper frame beams (9) and lower frame beams or foundation beams (8); A number of shaped steel core columns (2) are arranged inside the force wall parallel to the direction of the shaped steel laminated frame columns (1); between the shaped steel laminated columns (1) and shaped steel core columns (2) The spaces are connected by lattice steel beams (3); between the adjacent lattice steel beams (3), mesh steel braces (4) along the height direction of the reinforced concrete shear wall are arranged; the section steel laminated frame columns (1 ), shaped steel core columns (2), latticed steel beams (3) and reticulated steel braces (4) constitute the steel frame system of shaped steel columns-lattice steel beams-reticulated steel braces; shaped steel columns-lattice steel beams- The two sides of the net-shaped steel braced steel frame system are symmetrically arranged with steel mesh sheets composed of horizontally distributed steel bars (5) and vertically distributed steel bars (6), and the steel mesh sheets on both sides are tied with tie bars (7). Get up; form steel stacked frame columns (1), upper frame beams (9), lower frame beams or foundation beams (8) and reinforced concrete shear walls by pouring and ramming concrete to form a built-in steel column-lattice steel Beam-reticulated steel-braced concrete walls. 2. The built-in shaped steel column-lattice steel beam-network steel braced concrete wall according to claim 1, characterized in that: in the steel frame system of shaped steel column-lattice steel beam-network steel brace The frame column (1), the steel core column (2), the lattice steel beam (3) and the mesh steel brace (4) are rigidly connected, and the rigid connection includes welding. 3. The built-in steel column-lattice steel beam-reticular steel-braced concrete wall according to claim 1, characterized in that: the lattice steel beam (3) can be a plane truss or a space Truss; made of steel, its strength is not greater than the steel strength of the laminated steel frame column (1) and the steel core column (2); between the laminated steel frame column (1) and the steel core column (2) and the steel core column (2) are arranged in parallel along the height; the lattice steel beam (3) is welded on the intersection line of the laminated steel frame column (1) and the steel core column (2); the height-span ratio is greater than or equal to 1. 4. The built-in steel column-lattice steel beam-reticular steel braced concrete wall according to claim 1, characterized in that: the reticular steel brace (4) is made of steel, along the reinforced concrete shear wall The height and lattice steel beams (3) are arranged at intervals, and the inclination angle of the steel in the mesh steel brace (4) is between 45 degrees and 60 degrees, between the frame column (1) and the core column (2) of the profiled steel Rigid connection between them, said rigid connection includes welding. 5. The built-in shaped steel column-lattice steel beam-reticular steel-braced concrete wall according to claim 1, characterized in that: the frame steel stacked frame column (1) is equipped with longitudinal bars and hoops around the shaped steel column The steel-concrete composite column formed by pouring and tamping the concrete to the ribs; the section of the section steel laminated frame column (1) is I-shaped, cross-shaped, and double-shaped. less than the wall thickness. 6. The built-in shaped steel column-lattice steel beam-reticular steel-braced concrete wall according to claim 1, characterized in that: the section of the shaped steel core column (2) is I-shaped or double-shaped. Form; the size of the shaped steel core column (2) in the thickness direction of the reinforced concrete shear wall is smaller than the wall thickness. 7. The built-in shaped steel column-lattice steel beam-reticular steel-braced concrete wall according to claim 1, characterized in that: the horizontally distributed reinforcement bars (5) of the reinforced concrete shear wall are inserted into the shaped steel and superimposed The frame column (1); the upper end and the lower end of the vertically distributed reinforcing bars (6) respectively extend into the upper frame beam (9) and the lower frame beam or the foundation beam (8) for rigid connection. 8. The built-in steel column-lattice steel beam-reticular steel-braced concrete wall according to claim 1, characterized in that: the tie bars (7) in the reinforced concrete shear wall pass through the lattice The gaps of the structural steel beams (3) or the meshed steel braces (4) tie up the reinforcement mesh sheets formed by the horizontally distributed reinforcement bars (5) and the vertically distributed reinforcement bars (6) on both sides of the wallboard. 9. The built-in steel column-lattice steel beam-reticular steel braced concrete wall according to claim 1, characterized in that: the upper frame beam (9) and the lower frame beam or foundation beam (8) are Reinforced concrete beams, or shaped steel concrete beams, with a rectangular cross-section, concrete poured on site. 10. According to any one of claims 1 to 9, the method of built-in steel column-lattice steel beam-network steel braced concrete wall is characterized in that: the production sequence is as follows: 1) Fabrication of section steel laminated frame column (1) and section steel core column (2); 2) Bind the vertically distributed steel bars (6) of the shear walls, the steel bars of the lower frame beams or foundation beams (8), and stack the profiled steel frame columns (1), profiled steel core columns (2), and vertically distribute the shear walls The reinforcing bar (6) is inserted into the reinforcement cage of the lower frame beam or the foundation beam (8), and the concrete of the lower frame beam or the foundation beam (8) is poured. Rigid connection is realized at the bottom of the superimposed frame column (1), the steel core column (2), and the vertically distributed reinforcement bars (6) of the shear wall; 3) Manufacture lattice steel beams (3) and mesh steel braces (4), and rigidly connect them with section steel laminated frame columns (1) and section steel core columns (2), which can be realized by welding; 4) On both sides of the shaped steel column-lattice steel beam-reticular steel brace steel framework, a steel mesh sheet composed of horizontally distributed steel bars (5) and vertically distributed steel bars (6) is arranged, and the tie bars (7) are used to penetrate Tie the reinforcement mesh sheets on both sides through the gap of the lattice steel beam (3) or the mesh steel brace (4); 5) Fabricate the upper frame beam (9) so that it can be reliably and rigidly connected with the section steel superimposed frame column (1), section steel core column (2) and vertically distributed steel bars (6) of the wall panel; 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 for the composite frame columns (1), shear wall panels, and upper frame beams (9) of profiled steel, and the built-in profiled steel column-lattice steel beam-reticular steel-supported concrete wall is formed after molding.