CN108277904B - Prefabricated sash type light steel frame-reinforced mesh-foamed concrete composite wall - Google Patents

Abstract

The invention relates to an assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall. In the present invention, the CFST frame column, the CFST frame beam and the wall CFST rib together form the light steel frame frame of the wall panel, and together with the steel mesh to form the composite wall steel frame, the integrity of the wall panel is improved, and a new type of wall panel is adopted. The lightweight thermal insulation material foamed concrete is used to cast the wall panel, and after curing, a prefabricated sash-type light steel frame-reinforced mesh-foamed concrete composite wall is formed, and the composite wall only needs to be assembled to the external structure by connecting bolts. The prefabricated composite wall structure in the present invention is integrated with thermal insulation, has good bending resistance, shear bearing capacity and out-of-plane stiffness, and good seismic performance. It is a common quality problem, greatly improves the construction efficiency of the project, and reduces the amount of labor required for the project.

Description

Prefabricated sash type light steel frame-reinforced mesh-foamed concrete composite wall

technical field

The invention belongs to the technical field of fabrication of prefabricated composite walls in building structure engineering, and particularly relates to a prefabricated sash type light steel frame-reinforced mesh-foamed concrete composite wall and a method thereof.

Background technique

At present, our country is in a period of vigorous development of new urbanization and new rural construction. The large-scale and wide-ranging new rural construction and the urgent new rural reconstruction goal make simple integrated houses and low-rise prefabricated houses begin to be used in low-rise and multi-storey farm houses. developed in the structure. At this stage, integrated houses and prefabricated houses mostly use beam-column frames composed of steel structural components or steel-concrete structural components as the main stress system of the house structure. Excellent features such as flexibility and short construction period. However, at the same time, as the main components of the house structure, the external wall panels and the infill wall panels can only be used as the enclosure components of the house and cannot participate in the force. The overall housing also has problems of poor stability and poor earthquake resistance, which greatly restricts the application of integrated houses and prefabricated houses in residential buildings.

The construction of villages and towns in my country accounts for 60% of the total construction in the country. Most of the farm houses are located in the earthquake-resistant fortified areas. How to reasonably design and use the walls to improve the bearing capacity of low-rise integrated houses and prefabricated houses and enhance their seismic capacity without affecting their With the advantage of flexible spatial layout, the application of walls with bearing capacity and anti-seismic functions to low-rise buildings, especially low-rise buildings in villages and towns during the period of new rural construction, is the driving force for promoting new urbanization and new rural construction in my country. The essential.

Therefore, it is of great practical significance and social and economic value to develop a prefabricated composite wall that is economical, practical, low-cost, and easy to construct, suitable for low-rise buildings, especially low-storey rural houses in villages and towns.

SUMMARY OF THE INVENTION

The invention provides a prefabricated frame-type light steel frame-reinforced mesh-foamed concrete composite wall, and provides a method of structural thermal insulation integrated prefabricated wall for low-level multi-storey integrated houses and prefabricated houses, which is different from the traditional method. Compared with the prefabricated wall, it has better bearing capacity and seismic capacity, and is suitable for low-rise buildings with seismic fortification requirements, especially low-rise rural houses in villages and towns. measures, the status quo of weak earthquake resistance. At the same time, the on-site assembly and construction of the components are simple, which can promote the completion of the new rural construction and development goals.

To achieve the above object, the present invention adopts the following technical solutions:

An assembled frame-type light steel frame-reinforced mesh-foamed concrete composite wall, comprising a concrete-filled steel tubular frame column (1), a concrete-filled steel tubular frame beam (2), a steel mesh (3), and a wall body concrete-filled steel tubular rib (4) ), foamed concrete (5), connecting end plates (6) and connecting bolts (7); respectively welding the connecting end plates (6) and the connecting end plates ( 6) Upper prefabricated bolt holes; CFST frame columns (1) and CFST frame beams (2) are welded to form a composite wall light steel frame frame, and steel mesh (3) is welded inside the frame, and then horizontal and The vertical wall CFST rib (4), both ends of the wall CFST rib (4) are welded and fixed with the frame frame of the light steel frame of the composite wall, so far, the composite wall steel skeleton is formed; ), after curing, an assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall is formed; during assembly, the composite wall and the external structure are connected by connecting bolts (7).

The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall is characterized in that:

The CFST frame column (1) and the CFST frame beam (2) are made of square or rectangular steel pipes, the wall thickness of the steel pipes is not more than 8mm, the side lengths of the steel pipes are not less than 50mm, and the pipes are filled with concrete. CFST has a high shear bearing capacity, and the CFST frame column (1) and the CFST frame beam (2) are welded to form a composite wall light steel frame frame, which significantly increases the shear strength of the wall panel.

The diameter of the reinforcing bars used in the reinforcing steel mesh (3) is not less than 4 mm, and the spacing between the reinforcing bars is not less than 50 mm. The reinforcing bars are arranged vertically and fixed to form orthogonal reinforcing steel mesh sheets. Foamed concrete (5) middle. The steel mesh (3) can be made of steel bars welded by a spot welding machine in the factory to form a steel mesh. The welding program is controlled by a computer, the welding mesh is uniform, the welding quality is good, and the mechanical properties of the steel bar before and after welding remain unchanged.

The wall CFST rib (4) is made of square or rectangular steel pipe filled with concrete, the wall thickness of the steel pipe is not more than 5mm, and the horizontal and vertical wall CFST ribs (4) on both sides of the steel mesh (3) are perpendicular to each other, Together with the light steel frame frame of the wall, a wall panel frame is formed; when the foamed concrete (5) is poured, part or all of the steel tube concrete rib (4) is poured in the wall panel. The setting of the concrete-filled steel tube ribs (4) on the wall body increases the flexural resistance, shear resistance and out-of-plane bearing capacity of the wall panel, and improves the seismic resistance level of the wall panel.

The thickness of the foamed concrete (5) for the wall panel is not less than 60mm. According to the needs of the project, add the required admixtures to make the foamed concrete with the required performance of the project. Foamed concrete forms a large number of closed foam pores in the concrete, which realizes the lightweight and thermal insulation of building filling materials. It is a new type of lightweight thermal insulation material, which significantly reduces the weight of components and facilitates transportation and installation.

The thickness of the steel plate used in the connecting end plate (6) is not less than 6 mm, and bolt holes corresponding to the diameter of the connecting bolt (7) are machined on the connecting end plate. When the connecting end plate (6) is welded with the CFST frame column (1), a stiffener can be welded to strengthen the connection.

The connecting bolts (7) are not less than M16, and the strength is not less than 8.8. When the composite wall is installed, the connecting bolts (7) on each connecting end plate (6) are not less than 4.

Compared with the prior art, the assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall of the present invention has the following advantages:

(1) Most of the traditional prefabricated walls are external wall panels or large module infill walls, which can only be used as the enclosure components of the house and cannot participate in the force. Therefore, the overall stability of the house structure is poor, the bearing capacity is low, the ductility is poor, and the seismic capacity is poor. To solve the problem of weak and brittle failure, the assembled sash-type light steel frame-reinforced mesh-foamed concrete composite wall provided by the present invention acts as a stressed member in the structure, has bearing and earthquake resistance, and is suitable for earthquake-resistant fortifications. The required low-rise buildings, especially low-rise farm houses in villages and towns, are widely promoted to promote the completion of the new rural construction and development goals.

(2) The composite wall is selectively arranged in the column network as an anti-seismic unit, and is arranged in the weak position of the low-storey building structure, thereby increasing the lateral stiffness and seismic capacity of the building structure without affecting the building bay and layout.

(3) The CFST frame column, the CFST frame beam and the wall CFST rib together form the light steel frame frame of the wall panel, which changes the damage and damage form of the wall, and can effectively improve the bearing capacity and ductility of the wall.

(4) The design of the light steel frame frame of the wall formed by the concrete-filled steel tube frame beam and column improves the integrity of the wall panel and makes up for the knock angle that is easy to occur in the process of hoisting, transportation and construction at the position of the frame of the concrete thin wall panel member. , fragmentation affects the use of thin concrete wall panels, and improves the quality of prefabricated wall panels.

(5) The design of the steel skeleton of the wall panel formed by the concrete filled steel tube and the steel mesh increases the bending resistance, shear resistance and out-of-plane bearing capacity of the wall panel, and improves the seismic performance of the wall panel. The reconstruction of low-story farm houses with large quantities and wide areas can quickly and effectively improve the seismic performance of farm houses.

(6) The use of new building material foamed concrete, with a large number of closed-hole structures inside the foamed concrete, realizes the lightweight and thermal insulation of building filling materials. It is a new type of lightweight thermal insulation material, which significantly reduces the weight of components and facilitates transportation. with the installation. At the same time, foamed concrete also has the advantages of sound insulation, fire resistance, waterproof, environmental protection, good durability, etc. It is a new type of building material that has been rapidly developed and promoted.

(7) Most of the traditional seismic walls are cast-in-place components. The composite wall of the present invention is a prefabricated component, which is prefabricated in the factory, and the pouring quality of the wall panels is guaranteed. construction time. The prefabricated structural form can quickly and effectively improve the seismic performance of the house, which greatly promotes the realization of residential industrialization and urbanization. It is the research and development achievement of a new type of combined structure farm house technology, which plays an important role in promoting the improvement of traditional farm house structure technology.

Description of drawings:

Figure 1 is a partial schematic diagram of the assembled frame-type light steel frame-reinforced mesh-foamed concrete composite wall;

Figure 2 is a schematic diagram of the steel frame of the assembled frame type light steel frame-reinforced mesh-foamed concrete composite wall;

Figure 3 is the assembly effect diagram of the assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall.

In the figure: 1- CFST frame column; 2- CFST frame beam; 3- steel mesh; 4- wall CFST rib; 5- foamed concrete; 6- connecting end plate; 7- connecting bolt.

Detailed ways:

The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall in the invention, in conjunction with the accompanying drawings 1~3, illustrate that the manufacturing method of the present invention is as follows:

Step 1: Concrete is poured in the steel pipe and cured to form the CFST frame column, the CFST frame beam and the CFST rib of the wall; The plates are welded on the top and bottom of each CFST frame column respectively; the CFST frame column and the CFST frame beam are welded to form the frame frame of the composite wall light steel frame.

Step 2: Weld the steel mesh in the frame frame of the light steel frame of the composite wall, arrange the horizontal and vertical concrete-filled steel tube ribs of the wall on both sides of the steel mesh, and weld and fix the two ends of the ribs on the frame frame of the light steel frame of the composite wall. Composite wall steel skeleton.

The third step: make the wall panel pouring formwork, configure the foamed concrete, pour the foamed concrete for the wall panel, and form an assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall after curing. When the composite wall is assembled, it is installed and connected to the external structure through connecting bolts.

The above is a typical implementation case of the present invention, but the implementation of the present invention is not limited to this. The selection of each structure size and material listed in the present invention can be selected according to actual needs, and will not be listed one by one here.

Claims (8)

1. Assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall is characterized in that: comprising concrete-filled steel tubular frame column (1), concrete-filled steel tubular frame beam (2), steel mesh (3), wall steel pipe Concrete ribs (4), foamed concrete (5), connecting end plates (6) and connecting bolts (7); the connecting end plates (6) are respectively welded at the top and foot positions of the CFST frame column (1). The bolt holes are prefabricated on the connecting end plate (6); the CFST frame column (1) is welded with the CFST frame beam (2) to form the frame frame of the composite wall light steel frame, the steel mesh (3) is welded inside the frame, and then the two steel mesh Horizontal and vertical concrete-filled steel tubular ribs (4) of the wall body are arranged on the side, and both ends of the concrete-filled steel tubular rib (4) of the wall body are welded and fixed to the frame frame of the light steel frame of the composite wall. At this point, the steel frame of the composite wall is formed; The foamed concrete (5) forms an assembled sash-type light steel frame-reinforced mesh-foamed concrete composite wall after curing; during assembly, the composite wall and the external frame structure beam are connected by connecting bolts (7). 2. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to claim 1, is characterized in that: the CFST frame column (1) and the CFST frame beam (2) adopt Rectangular steel pipe, the wall thickness of the steel pipe is not more than 8mm, the side length of the steel pipe section is not less than 50mm, and the pipe is filled with concrete. 3. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to claim 1 is characterized in that: the diameter of the reinforcement used in the reinforcement mesh (3) is not less than 4mm, and the reinforcement spacing is not less than 4 mm. Less than 50mm, the steel bars are arranged vertically and fixed to form orthogonal steel mesh sheets. The steel mesh (3) is laid in a single piece in the composite wall, and is simultaneously poured in the middle of the foamed concrete (5). 4. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to claim 1, characterized in that: the wall body concrete-filled steel tube rib (4) is formed of a rectangular steel tube filled with concrete, The wall thickness of the steel pipe is not more than 5mm, and the horizontal and vertical wall concrete-filled steel tube ribs (4) on both sides of the steel mesh (3) are perpendicular to each other, and together with the light steel frame frame of the wall, form a wall panel frame; foamed concrete (5) During pouring, part or all of the concrete-filled steel tubular ribs (4) of the wall body are poured in the wall panel. 5. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to claim 1, characterized in that: the thickness of the foamed concrete (5) is not less than 60mm. 6. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to claim 1, characterized in that: the thickness of the steel plate used in the connecting end plate (6) is not less than 6mm, and the connecting end Bolt holes corresponding to the hole diameters of the connecting bolts (7) are machined on the plate. 7. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to claim 1, characterized in that: the connecting bolts (7) are not less than M16, the strength is not less than 8.8, and the combination During wall installation, there shall be no less than 4 connecting bolts (7) on each connecting end plate (6). 8. The assembled sash type light steel frame-reinforced mesh-foamed concrete composite wall according to any one of claims 1-7, is characterized in that, its production method is as follows: The first step: pour concrete in the steel pipe and maintain it to form the CFST frame column, the CFST frame beam and the CFST rib of the wall; The plates are welded on the top and bottom of each CFST frame column, respectively; the CFST frame column and the CFST frame beam are welded to form a composite wall light steel frame frame; Step 2: Weld the steel mesh in the frame frame of the light steel frame of the composite wall, and then arrange the horizontal and vertical walls of concrete-filled steel tube ribs on both sides of the steel mesh. Both ends of the ribs are welded and fixed on the frame frame of the light steel frame of the composite wall. So far, Form a composite wall steel skeleton; The third step: make the wall panel pouring formwork, configure the foamed concrete, pour the wallboard foamed concrete, and form an assembled frame-type light steel frame-reinforced mesh-foamed concrete composite wall after curing; when the composite wall is assembled, it is connected with the external The frame structure beams are installed and connected by connecting bolts.

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