CN107503469A - A kind of type lowly reinforced external wrapping concrete shaped steel Special-Shaped Columns of L 2 - Google Patents

Abstract

The invention discloses an L-2 type low-reinforcement outsourcing concrete shaped steel special-shaped column, which belongs to the technical field of structural engineering. The components are in the form of steel-wrapped concrete, in which the vertical erection steel bars and stirrups are not involved in the longitudinal force, which can limit the local stability of the special-shaped column and slab and reduce the size of the steel structure, which can effectively solve the problem of poor fire performance of steel structure buildings. Easy to rust and other problems, the size of the outsourcing concrete is small, so the cross-section of the component will not be greatly increased, and the assembly and repair between modules can be carried out as needed. The welding of the reinforcement cage and the section steel can effectively ensure the effective bonding of the outsourcing concrete and the section steel. The above-mentioned outsourcing concrete shaped steel special-shaped columns are processed in the factory. The connection of the upper and lower columns is only connected by steel welding or bolts, and the outsourcing concrete is added to the connection after the connection is completed. The invention has a high degree of industrialization, realizes the integration of design, production and construction, and improves the level of the housing industry. The components are assembled on site by hoisting, and the construction period is short.

Description

A L-2 type low-reinforcement concrete-shaped steel special-shaped column

technical field

The invention relates to an L-2 type low-reinforcement outsourcing concrete shaped steel special-shaped column, which belongs to the technical field of structural engineering.

Background technique

With the continuous advancement of national policies, the 16th National Congress of the Communist Party of China put forward the concept of new industrialization, and the 18th National Congress of the Communist Party of China proposed to take the road of new industrialization in Chinese style. The innovation and industrialization of the corresponding system of housing steel structure in my country ushered in unprecedented opportunities.

The basic requirements of the Chinese-style new road to industrialization are to improve scientific and technological innovation capabilities, reduce environmental pollution, reduce energy consumption and improve economic efficiency. The characteristics of construction industrialization are mainly divided into five aspects: standardization of design, factory production, assembly of construction, integration of decoration and management informationization. The general feature is the large-scale industrial production mode. Therefore, the concept of building industrialization development should follow the scientific development concept and develop according to the characteristics of building industrialization in a planned way; the current situation of my country's building industrialization is far from the requirements of building industrialization, and it is necessary to take the road of leapfrog development instead of step by step; Make full use of the relevant achievements of information technology, deeply integrate information technology and construction industrialization as soon as possible, and enter the road of new construction industrialization as early as possible.

The special-shaped column structure refers to the structural column whose cross-sectional shape is T-shaped, L-shaped, ten-shaped or Z-shaped. The special-shaped column structure is a structural system formed by replacing the traditional rectangular column with a special-shaped column as a vertical support member.

In the special-shaped column structure, the column limbs are as thick as the infill wall, which can prevent the column edges from protruding indoors. The building has a good view, and the room has a high "room rate", which is convenient for furniture arrangement and interior decoration, and brings flexibility to architectural design and use functions. and convenience. At the same time, the special-shaped column structure adopts light-weight, heat-preserving, heat-insulating, and high-efficiency wall materials as filling walls and internal partition walls, forming a light-weight and energy-saving structural system of special-shaped column frames, which conforms to the wall reform, saves energy, and can make full use of industrial waste. reduce environmental pollution.

The reinforced concrete special-shaped column structure uses special-shaped columns instead of traditional rectangular columns to form an "implicit frame". With the deepening of engineering application and research, some limitations of reinforced concrete (RC) special-shaped columns are clearly reflected, such as insufficient bearing capacity, low limit value of axial compression ratio, weak frame joints, and poor ductility and energy dissipation performance. ideal. Therefore, the maximum applicable height of the RC special-shaped column structure stipulated in my country's regulations is low, and the limit value of the axial compression ratio is strictly controlled, which is only applicable to areas with a fortification intensity of 8 degrees and below.

The steel reinforced concrete column structure is a steel skeleton added to the reinforced concrete, so that this structure has the dual advantages of the steel structure and the concrete structure, and fully exerts the excellent characteristics of the two materials of steel and concrete. Bearing capacity, stiffness, good ductility and energy dissipation capacity have become the preferred structural form for high-rise and super high-rise buildings. However, the steel reinforced concrete column not only has the requirement of reinforcement ratio but also requires a good connection between the upper and lower columns. The amount of steel used in traditional steel concrete columns is relatively large, and the high reinforcement ratio of steel bars makes concrete pouring more difficult, and the construction technology needs to meet higher requirements.

The special-shaped column structure with low-reinforcement outsourcing concrete section steel proposed by the present invention refers to section steel outsourcing concrete, and is equipped with certain longitudinal steel bars and stirrups. It is a new type of structure produced by the combination of special-shaped column structure and steel concrete structure. It not only has the advantages of non-protruding indoors, less building space, beautiful and practical, but also solves the fire prevention and protection of steel structure by outsourcing concrete. Corrosion and sound insulation and other issues.

The L-2 low-reinforcement outsourcing concrete-shaped steel special-shaped column adopted in the present invention is a pioneering innovation under the guidance of the new industrialization concept. This system can effectively realize the industrialization of key parts and overcome the shortcomings of the existing system, and It can realize the commercial production of parts and meet the needs of the socialized production system. The present invention aims at the industrialization of new buildings, takes the requirements of industrialization of buildings as the bottom line, develops a variety of structural components different from the previous building types, and satisfies the individual requirements of architectural design as much as possible.

Contents of the invention

The present invention proposes an L-2 low-reinforcement outsourcing concrete-shaped steel special-shaped column, which aims at overcoming the defects of the prior art and satisfying various mechanical properties of the joints, realizing assembly between structural modules, and increasing the assembly speed of components , fully adapt to the requirements and characteristics of the fabricated steel structure system.

Technical scheme of the present invention is as follows:

An L-2 type low-reinforcement outsourcing concrete steel special-shaped column, characterized in that:

It includes profiled steel (1), outsourcing concrete (2), longitudinal erecting steel bars (3) and stirrups (4); the profiled steel (1) is an L-shaped special-shaped column with four flanges and two webs;

The outsourcing concrete (2) is connected with the profiled steel (1) through the longitudinal erection reinforcement (3) and the stirrup (4), and the reinforcement cage formed by the longitudinal erection reinforcement (3) and the stirrup (4) is connected with the profiled steel ( 1) The contact position is welded and connected. The welded part is the part where the stirrup and the section steel are in contact. The welded connection is prefabricated in the factory, and the above connection is prefabricated in the factory;

The connection of the upper and lower columns of the L-2 low-reinforcement outsourcing concrete shaped steel special-shaped column does not add outsourcing concrete (2) during factory prefabrication, the upper and lower columns are connected by steel welding or bolts, and the upper and lower columns are connected after hoisting at the construction site The part is filled with outsourcing concrete (2), no stirrups are arranged, and the longitudinal erection reinforcement bars (3) between the upper and lower columns of the filled part are not connected.

Beneficial effect

The L-2 type low-reinforcement outsourcing concrete shaped steel special-shaped column of the present invention is a new structural form, which is used for the connection of corner columns in the steel structure system. The components are made of steel-wrapped concrete, in which the vertical erection steel bars and stirrups are not involved in the longitudinal force, which can limit the local stability of special-shaped column slabs and reduce the size of the steel structure, which can effectively solve the problem of poor fire performance and easy fire resistance of steel structure buildings. Corrosion and other problems, the size of the outsourcing concrete is small, so the cross-section of the component will not be greatly increased, and the assembly and repair between modules can be carried out as needed. Sectional steel gives full play to the characteristics of small section size and high bearing capacity of steel structure, which can better meet the requirements of flexible separation of large bays in buildings and improve the area utilization rate. The welding of the reinforcement cage and the section steel plays a role similar to that of a stud, which can effectively ensure the bonding of the outsourcing concrete and the section steel. The steel bars at the joints of the upper and lower columns are disconnected, and are only welded or bolted by section steel, which reduces the assembly of components. The invention meets the requirements of housing industrialization and sustainable development, is suitable for mass production in factories, has a high degree of industrialization, realizes the integration of design, production and construction, and improves the level of housing industry. The components are assembled on site by hoisting, and the construction and installation period is short, fully adapting to the requirements and characteristics of prefabricated steel structure buildings.

Description of drawings

Fig. 1 profiled steel structure schematic diagram of the present invention;

Fig. 2 steel cage structure schematic diagram of the present invention;

Fig. 3 section steel of the present invention and reinforcement cage welding position schematic diagram;

Fig. 4 is a schematic diagram of the special-shaped column structure of the present invention;

Fig. 5 is a schematic diagram of the welding connection of the upper and lower special-shaped columns of the present invention;

Figure 6 is a schematic diagram of the connection of the upper and lower special-shaped column bolts of the present invention;

In the figure, 1-L-2 low-reinforcement steel; 2-outsourcing concrete; 3-longitudinal erection reinforcement; 4-stirrup.

detailed description

The specific connection mode of the L-2 type low-reinforcement outsourcing concrete shaped steel special-shaped column of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in accompanying drawing 1～6, a kind of L-2 type low-reinforcement outsourcing concrete profiled steel special-shaped column of the present invention comprises section steel (1), outsourcing concrete (2), longitudinal erection reinforcing bar (3) and stirrup ( 4).

The outsourcing concrete (2) of the L-2 type low-reinforcement outsourcing concrete section steel special-shaped column is connected with the section steel (1) through vertical erection reinforcement (3) and stirrup (4), and longitudinal erection reinforcement (3) and stirrup (4) The reinforced cage and the section steel (1) are welded and connected. The welded part is the part where the stirrup and the section steel column are in contact. The welded connection is prefabricated in the factory, and the above structures are all prefabricated in the factory. No outsourcing concrete (2) is added to the connection part of the upper and lower columns in the factory prefabrication, and the upper and lower columns are connected by steel welding or bolts. After the hoisting is completed on the construction site, the connection part is filled with outsourcing concrete (2), and no stirrups (4) are arranged. The vertical erection reinforcement bars (3) between the upper and lower columns of the filled part are not connected.

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

Claims (1)

1. A kind of 1. L-2 types lowly reinforced external wrapping concrete shaped steel Special-Shaped Column, it is characterised in that：

   Including shaped steel (1), external wrapping concrete (2), longitudinal cableway (3) and stirrup (4)；The shaped steel (1) is four edges of a wing two The L-type Special-Shaped Column of web；

   The external wrapping concrete (2) is connected with shaped steel (1) by longitudinal cableway (3) and stirrup (4), and the longitudinal direction erects steel The steel reinforcement cage that muscle (3) and stirrup (4) are formed is welded to connect with the position that shaped steel (1) is in contact, and welding position is stirrup and shaped steel The position of contact, is welded to connect the completion that is prefabricated in the factory, and above-mentioned connection is prefabricated in the factory completion；

   The upper lower prop connecting portion of the L-2 types lowly reinforced external wrapping concrete shaped steel Special-Shaped Column does not add outsourcing when being prefabricated in the factory Concrete (2), upper lower prop is welded to connect by shaped steel or bolt connection, the upper lower prop connecting portion after the completion of job site lifts Filled by external wrapping concrete (2), do not configure stirrup, the longitudinal cableway (3) for filling intercolumniation above and below position is not connected to.