CN102704593B - Steel tube reinforced concrete composite column-steel beam-lattice steel support shear wall and manufacturing method - Google Patents

Abstract

"Concrete-filled steel pipe composite column-steel beam-lattice steel brace" shear wall and its method belong to the field of steel-concrete composite shear wall, including composite frame column of steel pipe concrete, composite core column of steel pipe concrete, steel beam, lattice structure Steel braces and reinforced concrete shear walls. Set steel pipe concrete composite frame columns at both ends of the shear wall; set several parallel steel pipe concrete composite core columns between them; between the steel pipe concrete composite frame columns and steel pipe concrete composite core columns The steel beams and lattice steel braces are connected between them; the steel bars of the shear wall are bound; The present invention has improved bearing capacity, slow attenuation of bearing capacity and stiffness, stable post-seismic performance, and the existence of the combined steel structure skeleton improves the ductility and energy dissipation performance of the shear wall, and the seismic performance is superior; the steel structure is convenient for construction and can be used for high-rise or high-rise buildings. In a large complex multi-storey building.

Description

"Concrete-filled steel tube composite column-steel beam-lattice steel brace" shear wall and its method

technical field

The invention relates to a "steel tube concrete composite column-steel beam-lattice steel brace" shear wall and a method thereof, which belong to a composite shear wall and a manufacturing method thereof.

Background technique

At present, due to the increasing shortage of urban land and the diversification of social needs, the height and span of buildings are increasing, and their shapes are becoming more and more complex. The difficulty of seismic analysis and design of structures is increasing. Many high-rise buildings that have been built or are under construction in our country are located in strong earthquake areas, facing the threat of serious earthquake disasters. The existing reinforced concrete shear walls have poor ductility under earthquake action and are prone to brittle failure, which is very detrimental to the seismic performance of the overall structure.

Shear walls are the core anti-lateral force components in high-rise building structures. The development of shear walls with good seismic performance is one of the key technologies in building seismic design. The hybrid structure composed of steel structure and concrete structure has played two Due to their respective advantages, materials have become one of the main structural forms of high-rise and super high-rise buildings. There are many forms of steel-concrete composite shear walls. Steel, steel pipe, steel plate, etc. and concrete can be combined in different forms in different parts of the shear wall. At present, there are mainly two types of composite shear walls that have been studied more Type: One is "composite wall panel shear wall", the wall panel is combined with steel plate and concrete wall panel in different forms to form "composite wall panel". The other is "combined shear wall with frame". The wall panel of this type of composite shear wall is generally made of reinforced concrete, while the frame is made of I-beam, steel concrete or steel pipe concrete; in addition, the wall panel can also be made of steel plate, and The frame is made of reinforced concrete; the frame and composite wall panels can also be combined together.

In addition, the shear wall also requires a large elastic initial stiffness, large deformation capacity, good plastic properties, and stable hysteretic characteristics. The emergence of outsourcing 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 brittle concrete at corners, etc., and also increases the strength of shear walls. Lateral bending stiffness has become a very promising high-rise lateral force system. However, the vertical bearing capacity of the general reinforced concrete shear wall, steel plate composite shear wall and other wall concrete parts will be greatly reduced after the cracking and failure of the wall, resulting in a decrease in the vertical bearing capacity of the entire wall. At the same time, the destruction of the frame as the second line of defense is also accelerated, and the energy consumption and ductility of the entire structure are also reduced, resulting in the weakening and reduction of the seismic performance of the shear wall.

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:

"Concrete-filled steel pipe composite column-steel beam-lattice steel brace" shear wall, including composite steel pipe concrete composite frame column 1, composite steel pipe concrete core column 2, steel beam 3, lattice steel brace 4 and reinforced concrete shear force Wall: The section of the composite shear wall is straight, and the composite steel skeleton system of "concrete filled steel pipe composite column-steel beam-lattice steel brace" is hidden in the reinforced concrete shear wall.

The "concrete-filled steel pipe composite column-steel beam-lattice steel brace" combined steel frame system refers to the frame column 1 composed of concrete-filled steel pipe composite, the composite core column 2 of steel pipe concrete composite, the steel beam 3 between the columns and the lattice structure. The steel brace 4 is just connected and formed.

The steel girder 3 is a steel plate girder series whose net distance between adjacent steel girders is suitable for arranging lattice steel braces 4 between the steel girders 3; Concrete-filled steel tube composite core column 2, whose thickness is not greater than the sum of steel tube wall thicknesses in steel tube concrete-filled steel frame composite frame column 1 or steel tube concrete composite core column 2 in the wall thickness direction of the vertical reinforced concrete shear wall, and the height-span ratio is not less than 1. The steel beam 3 passes through the CFST laminated frame column 1 and the CFST laminated core column 2, and is welded on the intersection line of the steel pipes in the CFST laminated frame column 1 and the CFST laminated core column 2.

The lattice steel brace 4 is a truss-type steel brace arranged in a "zigzag" shape along the wall height of the reinforced concrete shear wall, the inclination angle is between 45 degrees and 60 degrees, and the plane of the steel brace can be selected to be perpendicular to the plane of the wall Arrangement and parallel arrangement of the steel brace plane and the wall plane; the lattice steel brace 4 is rigidly connected to the steel tube concrete composite frame column 1 and the steel tube concrete composite core column 2; the rigid connection includes welding and the like.

The concrete-filled steel pipe composite frame column 1 and the concrete-filled steel pipe composite core column 2 are steel-concrete composite columns formed by adding longitudinal bars and stirrups around the concrete-filled steel pipe column and then pouring concrete; The cross-section of the composite core column 2 can be in the shape of a circle, a rectangle, etc., and a single-cavity concrete-filled steel pipe composite column or a multi-cavity concrete-filled steel pipe composite column is used. The inner steel pipe is not greater than the thickness of the reinforced concrete shear wall in the thickness direction of the reinforced concrete shear wall.

The horizontally distributed steel bars 5 of the shear wall are inserted into the composite steel pipe concrete frame column 1; the upper and lower ends of the vertically distributed steel bars 6 extend into the upper frame beam 9 and the lower frame beam or foundation beam 8 respectively for rigid connection.

The tie bars 7 of the shear wall distribute horizontally on both sides of the reinforced concrete shear wall through the gaps between adjacent steel beams 3 and lattice steel braces 4 or through the reserved round holes in the steel beams 3 The reinforcing steel mesh sheet that reinforcing bar 5 and vertically distributed reinforcing bar 6 are formed is tied 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 construction steps of the "concrete filled steel pipe composite column-steel beam-lattice steel brace" shear wall are as follows:

1) Fabricate the CFST composite frame column 1 and the CFST laminated core column 2, and reserve a rectangular hole passing through the steel beam 3 on the CFST laminated frame column 1 and the CFST laminated core column 2;

2) Bind the vertically distributed steel bars 6 in the reinforced concrete shear wall, the steel bars of the lower frame beam or foundation beam 8, and stack the frame column 1 of the steel tube concrete, the core column 2 of the steel tube concrete stack, and the vertical Distributed steel bars 6 are inserted into the reinforcement cage of the lower frame beam or foundation beam 8, and the concrete of the lower frame beam or foundation beam 8 is poured. After the concrete is cured and consolidated, the lower frame beam or foundation beam 8 is laminated with the frame column 1, The rigid connection is realized at the bottom of the steel tube concrete composite core column 2 and the vertically distributed steel bars 6 of the reinforced concrete shear wall;

3) Fabricate the steel beam 3 and lattice steel brace 4, the steel beam 3 passes through the CFST column, and performs welding on the intersection line of the steel pipe in the CFST composite frame column 1 and the CFST laminated core column 2, and the lattice Structural steel support 4 is welded to steel pipe concrete laminated frame column 1 and steel pipe concrete laminated core column 2;

4) The two sides of the “steel plate beam-lattice steel brace” steel framework formed by the composite steel pipe concrete core column 2, steel beam 3 and lattice steel brace 4 are symmetrically arranged on both sides, and are composed of horizontally distributed steel bars 5 and vertically distributed steel bars 6 The reinforcement mesh, and pass through the lattice steel brace 4 gap between the adjacent steel beams 3 with tie reinforcement 7 or pass through the reservation in the steel beam 3 and put into the round hole to tie the reinforcement mesh on both sides;

5) Fabricate the upper frame beam 9, so that the upper frame beam 9 is rigidly connected with the steel pipe concrete composite frame column 1, the steel pipe concrete composite core column 2 and the vertically distributed steel bars 6 of the wall panels;

6) On both sides of the reinforced concrete shear wall, leave the thickness of the concrete protective layer through the cement pad, and then support the formwork for pouring concrete;

7) Concrete is poured for concrete-filled steel pipe laminated frame column 1, concrete-filled steel pipe laminated core column 2, reinforced concrete shear wall, and upper frame beam 9, and the "concrete-filled steel pipe composite column-steel beam-lattice steel" is formed after forming support” shear wall.

The present invention forms a combination of "concrete-filled steel pipe composite columns-steel beam-lattice steel braces" along the height staggered by the steel beams between the concrete-filled steel pipe composite columns and the steel beams between the concrete-filled steel pipe composite columns and the lattice steel braces between the steel beams. The combination of the advantages of steel frame and reinforced concrete wall panels, while giving full play to the seismic capacity of reinforced concrete wall panels, also makes full use of the seismic loss of the combined steel frame of "concrete filled steel pipe composite columns-steel beams-lattice steel braces". It can play a role in avoiding the rapid reduction of the bearing capacity of the concrete wall after the cracking of the concrete wall. After adding steel beams and lattice steel braces between the composite steel tube concrete composite columns of the new composite shear wall, it has the following stress and functional characteristics: the steel beam connects each independent steel tube concrete composite columns into a stable whole , which greatly improves the compressive bearing capacity of a single concrete-filled steel tube composite column; at the same time, due to the existence of sufficient clearance between adjacent steel beams, when the earthquake load is input, each steel beam can deform independently in the wall plane , to give full play to the deformation and energy dissipation capacity of steel; due to the existence of the clear distance between adjacent steel beams, lattice steel braces can be arranged between them; the lattice steel braces arranged between steel beams further strengthen the overall work of the wall Compared with the solid-belly steel brace, the amount of steel used is reduced, the input wall seismic force is reduced, the concrete pouring and tamping of the combined wall is more convenient, and the construction quality is easier to guarantee; Combined columns and steel beams form a truss-type "steel tube concrete composite column-steel beam-lattice steel brace" composite steel skeleton. The elastic initial stiffness of the body ensures that the composite wall has a good bearing capacity and later stability, and the seismic capacity is greatly improved.

After the two sides of the "concrete-filled steel tube composite column-steel beam-lattice steel brace" composite steel frame system are covered with reinforced concrete wall panels, the concrete wall panels effectively restrain the steel beams, lattice steel braces, and composite steel tube concrete. The out-of-plane buckling of the column steel plate enables the steel plate to effectively work in the plane for a longer period of time to resist the energy input by the earthquake; the braced gap between the steel beams or the middle position of the steel beam passes through the tie reinforcement The steel mesh sheets on both sides of the concrete wall are tied, and the concrete wall panels on both sides are combined with the "concrete steel tube composite column-steel beam-lattice steel brace" composite steel skeleton in the middle to work together. Complementary advantages.

The "steel tube concrete laminated column-steel beam-lattice steel brace" shear wall of the present invention has multiple 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 anti-seismic defense line, and the combined steel frame of "concrete filled steel pipe composite column-steel beam-lattice steel brace" delays the appearance of cracks in the concrete wall and improves the The vertical bearing capacity of the concrete wall panel as the first line of defense against earthquakes. As the input energy increases, the concrete wall cracks and the first line of defense collapses. At this time, the composite steel skeleton of "concrete filled steel pipe composite column-steel beam-lattice steel brace" begins to play a role as the second line of defense for seismic bearing capacity. . In the second line of defense, due to the weak lattice steel bracing, the energy dissipation through in-plane deformation will first yield, and secondly, the steel beams will yield before the steel columns because the thickness of the steel plate is thinner than that of the steel columns, and through in-plane bending and shear deformation Energy consumption, therefore, the second line of defense is a kind of anti-seismic defense line with "twice yield" protection, which can consume the seismic capacity to the maximum extent and protect the structural safety. When encountering a big earthquake, the frame structure composed of the steel pipe concrete laminated columns and the upper and lower frame beams inside the wall is a geometrically invariant system, thereby maintaining the overall stability of the structure. This is the third anti-seismic defense line of the present invention . Compared with ordinary shear walls, the energy dissipation capacity of concrete and steel can be better exerted, and the multiple anti-seismic defense lines make the later seismic performance of the structure more stable. The existence of the steel skeleton also makes the shear wall have higher elastic initial stiffness and overall work performance.

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. , The steel structure is easy to construct and can be used in high-rise or large complex multi-storey buildings.

Description of drawings

Figure 1 is a steel and reinforcement diagram for the shear wall of "concrete filled steel pipe composite column-steel beam-lattice steel brace"

Figure 2 is a partially enlarged schematic diagram of a composite shear wall

Figure 3 is a schematic diagram of the facade of the composite shear wall

Figure 4 is a horizontal section view of the composite shear wall

In the figure: 1-Concrete-filled steel pipe laminated frame column, 2-Concrete-filled steel pipe laminated core column, 3-Steel beam, 4-Lattice steel brace, 5-Horizontal distribution of reinforcement, 6-Vertical distribution of reinforcement, 7-Tie tie Steel bar, 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:

The structural schematic diagram of a structural unit of the "concrete filled steel pipe composite column-steel beam-lattice steel brace" shear wall is shown in Figure 1, Figure 2, Figure 3 and Figure 4.

"Concrete-filled steel tube composite column-steel beam-lattice steel brace" shear wall, the production sequence is as follows:

1) Fabricate the CFST composite frame column 1 and the CFST laminated core column 2, and reserve a rectangular hole passing through the steel beam 3 on the CFST laminated frame column 1 and the CFST laminated core column 2;

2) Bind the vertically distributed steel bars 6 in the reinforced concrete shear wall, the steel bars of the lower frame beam or foundation beam 8, and stack the frame column 1 of the steel tube concrete, the core column 2 of the steel tube concrete stack, and the vertical Distributed steel bars 6 are inserted into the reinforcement cage of the lower frame beam or foundation beam 8, and the concrete of the lower frame beam or foundation beam 8 is poured. After the concrete is cured and consolidated, the lower frame beam or foundation beam 8 is laminated with the frame column 1, The rigid connection is realized at the bottom of the steel tube concrete laminated core column 2 and the vertically distributed steel bars 6 of the reinforced concrete shear wall;

3) Fabricate the steel beam 3 and lattice steel brace 4, the steel beam 3 passes through the CFST column, and performs welding on the intersection line of the steel pipe in the CFST composite frame column 1 and the CFST laminated core column 2, and the lattice Structural steel support 4 is welded to steel pipe concrete laminated frame column 1 and steel pipe concrete laminated core column 2;

4) The two sides of the “steel plate beam-lattice steel brace” steel framework formed by the composite steel pipe concrete core column 2, steel beam 3 and lattice steel brace 4 are symmetrically arranged on both sides, and are composed of horizontally distributed steel bars 5 and vertically distributed steel bars 6 The reinforcement mesh, and pass through the lattice steel brace 4 gap between the adjacent steel beams 3 with tie reinforcement 7 or pass through the reservation in the steel beam 3 and put into the round hole to tie the reinforcement mesh on both sides;

5) Fabricate the upper frame beam 9, so that the upper frame beam 9 is rigidly connected with the steel pipe concrete composite frame column 1, the steel pipe concrete composite core column 2 and the vertically distributed steel bars 6 of the wall panels;

6) On both sides of the reinforced concrete shear wall, leave the thickness of the concrete protective layer through the cement pad, and then support the formwork for pouring concrete;

7) Concrete is poured for concrete-filled steel pipe laminated frame column 1, concrete-filled steel pipe laminated core column 2, reinforced concrete shear wall, and upper frame beam 9, and the "concrete-filled steel pipe composite column-steel beam-lattice steel" is formed after forming support” shear wall.

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

Claims (8)

1. "Concrete-filled steel pipe composite column-steel beam-lattice steel brace" shear wall, including composite steel pipe concrete composite frame column (1), composite steel pipe concrete core column (2), steel beam (3), lattice structure Steel braces (4) and reinforced concrete shear walls; it is characterized in that: the cross section of the combined shear wall is a straight line, and the composite steel skeleton system of "concrete filled steel pipe composite column-steel beam-lattice steel brace" is embedded in Inside the reinforced concrete shear wall; at both ends of the reinforced concrete shear wall, a steel pipe concrete laminated frame column (1) is arranged; the upper and lower positions of the steel pipe concrete laminated frame column (1) are provided with an upper frame beam (9) and The lower frame beam or foundation beam (8); the composite steel tube concrete core column (2) is installed in the direction parallel to the steel tube concrete composite frame column (1) inside the reinforced concrete shear wall; the steel tube concrete composite frame column ( 1) Steel beams (3) are used to connect between the concrete-filled steel tube composite core columns (2) and between the concrete-filled steel tube composite core columns (2); The wall height of the concrete shear wall is a lattice steel brace (4) arranged in a zigzag pattern; the composite frame column of steel tube concrete (1), the composite core column of steel tube concrete (2), the steel beam (3) and the lattice structure Steel braces (4) form the combined steel frame system of "concrete-filled steel pipe composite columns-steel beams-lattice steel braces"; Symmetrically arrange the steel mesh consisting of horizontally distributed steel bars (5) and vertically distributed steel bars (6), and use tie bars (7) to pass through the gaps between adjacent steel beams (3) or pass through the steel beams (3) The round holes reserved in the center will tie the reinforcement mesh on both sides; the steel pipe concrete composite frame column (1), the steel pipe concrete composite core column (2), the upper frame beam (9), the lower frame beam or the foundation beam (8) and the reinforced concrete shear wall is formed by pouring and ramming concrete, which constitutes the shear wall of "concrete filled steel pipe composite column-steel beam-lattice steel brace". 2. The "concrete filled steel pipe composite column-steel beam-lattice steel brace" shear wall according to claim 1, characterized in that: the steel beams (3) have a suitable net distance between adjacent steel beams It is a series of steel plate girders with latticed steel braces (4) arranged between the steel girders (3); the steel strength of the steel girders (3) is not greater than that of the CFST composite frame column (1) and the CFST composite core column (2 ), whose thickness is not greater than the sum of steel pipe wall thicknesses in the steel pipe concrete composite frame column (1) or steel pipe concrete composite core column (2) in the wall thickness direction of the vertical reinforced concrete shear wall, and the height-span ratio is not less than 1; The steel beam (3) passes through the CFST composite frame column (1) and the CFST laminated core column (2), and passes through the CFST laminated frame column (1) and CFST laminated core column (2). Welding is carried out on the intersection line of steel pipes. 3. The shear wall of "concrete filled steel pipe composite column-steel beam-lattice steel brace" according to claim 1, characterized in that: the lattice steel brace (4) is a truss-type steel brace, along which the reinforced concrete The wall height of the shear wall is arranged in a zigzag shape, and the inclination angle is between 45 degrees and 60 degrees. The brace (4) is rigidly connected to the frame column (1) and the concrete-filled steel tube composite core column (2); the rigid connection includes welding. 4. The "concrete-filled steel tube composite column-steel beam-lattice steel brace" shear wall according to claim 1, characterized in that: the concrete-filled steel tube composite frame column (1), the concrete-filled steel tube composite core column (2) A steel-concrete composite column formed by adding longitudinal bars and stirrups to the periphery of the steel tube concrete column and then pouring concrete; the cross section of the steel tube concrete composite frame column (1) and the steel tube concrete composite core column (2) is circular , rectangular, using single-cavity concrete-filled steel pipe composite columns or multi-cavity concrete-filled steel pipe composite columns, steel pipe composite steel pipe composite frame columns (1) and steel pipe concrete composite core columns (2) in the reinforced concrete shear wall The thickness direction is not greater than the thickness of the reinforced concrete shear wall. 5. The "concrete-filled steel tube composite column-steel beam-lattice steel brace" shear wall according to claim 1, characterized in that: the horizontally distributed steel bars (5) of the shear wall are inserted into the composite steel tube concrete 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 foundation beam (8) for rigid connection. 6. The "concrete filled steel pipe composite column-steel beam-lattice steel brace" shear wall according to claim 1, characterized in that: the tie bars (7) of the shear wall pass through adjacent steel beams (3) and the gap between the lattice steel braces (4) or pass through the reserved circular holes in the steel beams (3) to distribute the horizontally distributed steel bars (5) and vertically distributed steel bars (5) on both sides of the reinforced concrete shear wall 6) The formed steel mesh sheets are pulled together. 7. The "concrete filled steel pipe composite column-steel beam-lattice steel brace" shear wall according to claim 1, characterized in that: the upper frame beam (9) and the lower frame beam or foundation beam (8) It is a reinforced concrete beam, or a steel concrete beam with a rectangular cross-section, and the concrete is poured on site. 8. According to any one of claims 1 to 7, the method of "concrete filled steel pipe composite column-steel beam-lattice steel brace" shear wall is characterized in that: the production sequence is as follows: 1) Fabricate the CFST laminated frame column (1) and CFST laminated core column (2), and reserve steel beams on the CFST composite frame column (1) and CFST laminated core column (2) (3) the rectangular hole; 2) Bind the vertically distributed steel bars (6) in the reinforced concrete shear wall, the steel bars of the lower frame beams or foundation beams (8), and stack the frame columns (1) and concrete-filled steel tube core columns ( 2) The vertically distributed steel bars (6) of the shear wall are inserted into the reinforcement cage of the lower frame beam or foundation beam (8), and the concrete of the lower frame beam or foundation beam (8) is poured. After the concrete is cured and consolidated, the lower frame The beam or the foundation beam (8) is rigidly connected to the bottom of the reinforced concrete shear wall vertically distributed steel bars (6) with the composite frame column (1) of the steel tube concrete composite (1), the composite core column of the steel pipe concrete (2); 3) Fabricate steel beams (3) and lattice steel braces (4), the steel beams (3) pass through the CFST column, and are laminated with the CFST frame column (1) and CFST core column (2) Welding is carried out on the intersection line of steel pipes, and the lattice steel brace (4) is welded to the composite frame column (1) of steel pipe concrete and the composite core column (2) of steel pipe concrete; 4) The “steel plate beam-lattice steel brace” steel skeleton formed by the composite steel tube concrete core column (2), steel beam (3) and lattice steel brace (4) is symmetrically arranged on both sides and is composed of horizontally distributed steel bars (5 ) and vertically distributed steel bars (6), and the tie bars (7) pass through the gaps between the lattice steel braces (4) between adjacent steel beams (3) or through the steel beams (3) Put the reservation into the round hole to tie up the reinforcement mesh on both sides; 5) Make the upper frame beam (9), and make the upper frame beam (9) rigidly connected with the composite frame column of steel tube concrete (1), the composite core column of steel tube concrete (2) and the vertically distributed reinforcement of the wall panel (6) ; 6) On both sides of the reinforced concrete shear wall, leave the thickness of the concrete protective layer through the cement pad, and then support the formwork for pouring concrete; 7) Concrete is poured for concrete-filled steel tube composite frame columns (1), concrete-filled steel tube composite core columns (2), reinforced concrete shear walls, and upper frame beams (9). Steel beam-lattice steel brace” shear wall.