CN203440996U - Steel rib concrete special-shaped column with T-shaped section and quadrangular hole formed in steel rib web - Google Patents

Abstract

The utility model discloses a T-shaped cross-section steel-reinforced concrete special-shaped column with quadrilateral holes in the steel-bone web, which comprises a steel skeleton, a steel skeleton and concrete; the steel skeleton is a T-shaped cross-section steel skeleton, including three A steel frame web and three steel frame flanges, a plurality of quadrangular holes are opened on the steel frame web; the steel frame includes longitudinal steel bars and stirrups; the steel frame is located at the center of the section of the special-shaped column The steel skeleton surrounds the site, and the concrete wraps the steel skeleton and the steel skeleton. The utility model does not need to be provided with shear connectors, reduces the amount of steel used, enhances the bonding performance between the steel frame and concrete, improves the cooperative work ability between the steel frame and concrete, reduces its slippage, and improves the stable bearing capacity of the steel frame , and better solve the problem of fire prevention and anticorrosion without adding additional costs; the construction is simple and convenient, and the comprehensive cost of the project is reduced.

Description

Special-shaped steel-reinforced concrete columns with T-shaped cross-section and quadrilateral holes in the steel-reinforced web

technical field

The utility model relates to the technical field of a new building structure, in particular to a steel-reinforced concrete special-shaped column with a steel-reinforced web with quadrilateral holes.

Background technique

In residential buildings, special-shaped column structures have incomparable advantages over other structural systems, and are more and more favored by people. In recent years, they have been highly valued by scholars and engineers at home and abroad, and thus have been widely used.

In multi-story residential buildings, the reinforced concrete special-shaped column structure is difficult to meet the requirements of bearing capacity and joint treatment due to many restrictions such as the length and thickness ratio of the column section, so that the advantages of the special-shaped column cannot be fully reflected, thus limiting its application. range; and the pure steel special-shaped column is difficult to popularize due to the high cost of fire prevention and anticorrosion treatment. In order to overcome the shortcomings of the above two types of special-shaped column structures and give full play to the advantages of steel and concrete, the steel reinforced concrete special-shaped column structure formed by wrapping concrete outside the pure steel special-shaped column came into being.

There are two main forms of steel reinforcement in steel reinforced concrete special-shaped columns: solid-web type and truss type (also known as empty-web type). Relatively speaking, the truss steel frame in the truss-type steel-reinforced concrete special-shaped column is welded by angle steel or channel steel through horizontal and oblique slabs or strips. The construction is relatively cumbersome, and the connection workload is too large. Force and shock resistance are limited. In the solid-web steel reinforced concrete special-shaped column, when the steel frame does not have shear connectors, the bond between the steel and concrete is very low (only about 45% of the bond between the smooth steel bar and concrete) %), the lack of cohesive force will affect the cooperative work between the steel frame and concrete (the current research basically does not set up shear connectors, but in the analysis it is assumed that the steel frame and concrete work together completely, which is different from the The actual working state is not consistent), which affects the bearing capacity, failure mode and working mechanism of the component; if the shear connector (bolt) is installed, although the cooperative work ability between the steel frame and the concrete can be improved, but due to The contact between studs and concrete bears complex forces, and the concrete is easy to be damaged early and lose its bearing capacity. In addition, studs need special welding equipment to weld, which will increase the difficulty and complexity of construction, increase the construction workload, reduce the construction speed, and increase the construction cost. The construction period and steel consumption will increase the overall cost of the project.

In order to make the special-shaped column structure more widely used in multi-story residential buildings, it is necessary to improve the mechanical performance of the existing steel-reinforced concrete special-shaped columns without significantly increasing the comprehensive cost of the project.

Utility model content

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a steel-reinforced concrete special-shaped column with a steel-reinforced web with quadrilateral holes.

The technical solution adopted by the utility model is: a T-shaped cross-section steel-reinforced concrete special-shaped column with a steel-frame web with quadrilateral holes, including a steel frame, a steel frame and concrete;

The steel frame is a T-shaped cross-section steel frame, including three steel frame webs and three steel frame flanges, and a plurality of quadrangular holes are opened on the steel frame web;

The steel skeleton includes longitudinal steel bars and stirrups;

The steel skeleton is located at the center of the section of the special-shaped column, the steel skeleton surrounds it, and the concrete wraps the steel skeleton and the steel skeleton.

Preferably, the section type of the steel skeleton includes two types of T-shaped section with equal limbs and unequal limbs.

Preferably, the composition of the steel skeleton is formed by welding T-shaped steel and H-shaped steel after opening holes in the web, or combining steel plates after opening holes by welding.

Preferably, the opening forms of the steel frame web include rectangle and square.

For steel-reinforced concrete structures, the composite effect mainly depends on the bonding force between the steel-reinforced concrete and the concrete. Therefore, how to increase the bonding force between the steel frame and concrete, reduce its interface slip, and improve its working performance has become the focus of attention. In this regard, the utility model opens a certain number of quadrilateral holes on the steel web of the T-shaped cross-section solid-web steel-reinforced concrete special-shaped column to form a T-shaped cross-section steel-reinforced concrete special-shaped column with quadrilateral holes on the steel web.

In the combination mode of the utility model, the shaped steel frame is the main load-bearing frame, so it is necessary to ensure a certain ratio of steel allocation. Since the bonding force and cooperating ability between the steel frame and concrete will be greatly enhanced with the increase of the web opening rate, it is necessary to ensure that the steel web has a certain opening rate. The longitudinal reinforcement in the reinforced skeleton mainly plays the role of vertical reinforcement, so it only needs to be reinforced according to the structure; the main function of the stirrup is to restrain the concrete, increase the bonding force between the steel skeleton and the concrete, thereby improving its bearing capacity and Ductility, so it is necessary to ensure a certain hoop ratio.

In the utility model, the steel frame is usually manufactured in the steel structure processing plant; the lofting of the steel bar, binding and pouring of the concrete are all carried out on the construction site.

Beneficial effects: the steel frame web of the utility model changes the surface shape of the section steel after opening holes, increases the contact area between the steel frame and concrete, and can greatly strengthen the steel frame and concrete without setting shear connectors. The bonding force between the interfaces can improve the cooperating ability between the steel frame and the concrete, reduce its slippage, improve its working performance, and make its stress more reasonable.

Due to the existence of the hole in the web of the steel frame, the utility model makes the stirrup directly pass through the hole to form a closed shape, without welding or additional perforation on the steel plate, which reduces the difficulty of construction, is convenient for construction and easy for the restraint of the stirrup of full play.

The concrete of the core part of the utility model is double restrained by the steel frame flange and the stirrup, which not only improves the bonding force between the steel frame and the concrete, but also ensures better cooperation between the concrete and the steel frame, and improves its stress Performance, and the bearing capacity and ductility of the entire member are improved.

The utility model can improve the stable bearing capacity of the steel frame without increasing the steel materials.

The utility model better solves the problem of fire prevention and anticorrosion of the steel structure without increasing additional costs.

The utility model does not need to be provided with anti-shear connectors, saves labor and materials, and can reduce the comprehensive cost of the project.

The utility model can provide key components for the development of a new steel structure residential system, and has a good transformation prospect.

The utility model expands the research and application fields of the steel-reinforced concrete structure, and greatly enriches the content of the steel-concrete composite structure.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1: a steel-reinforced concrete special-shaped column with a steel-reinforced web with quadrilateral holes, including a steel-reinforced framework, a reinforced framework and concrete 9;

The steel frame is a steel frame with a T-shaped cross section, including steel frame web one 4, steel frame web two 5, steel frame web three 6, steel frame flange one 1, steel frame flange two 2 and steel frame Bone flange three 3, the steel frame web one 4, steel frame web two 5, and steel frame web three 6 are provided with a plurality of quadrangular holes;

The reinforcement skeleton includes longitudinal reinforcement 7 and stirrup 8;

The steel skeleton is located at the center of the section of the special-shaped column, the steel skeleton surrounds it, and the concrete 9 wraps the steel skeleton and the steel skeleton.

The section types of steel skeletons include equal-leg and unequal-leg T-shaped sections. The composition of the steel frame is formed by welding T-shaped steel and H-shaped steel after opening holes in the web, or combining steel plates after opening holes by welding. The opening forms of the steel frame web include rectangle and square.

The steel frame web of the utility model changes the surface shape of the section steel after the hole is opened, increases the contact area between the steel frame and the concrete, increases the surface roughness of the steel frame at the opening, and enhances the mechanical bite force between the section steel and the concrete. Improve the cooperating ability between steel frame and concrete and reduce its slippage; at the same time, due to the existence of the hole, it is convenient for the stirrup to pass directly through the hole to form a closed shape without welding or bending, which is convenient for construction and easy for the stirrup The play of constraints.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (4)

1. reinforcing bar web is opened a T section steel reinforced concrete hetermorphiscal column for quadrangle hole, it is characterized in that: comprise reinforcing bar skeleton, cage of reinforcement and concrete;

Described reinforcing bar skeleton is T section reinforcing bar skeleton, comprises three blocks of reinforcing bar webs and three reinforcing bar edges of a wing, offers a plurality of quadrangle holes above described reinforcing bar web;

Described cage of reinforcement comprises longitudinal reinforcement and stirrup;

Described reinforcing bar skeleton is positioned at the kernel of section position of described hetermorphiscal column, and described cage of reinforcement is around it, and described concrete wraps up reinforcing bar skeleton, cage of reinforcement wherein.

2. reinforcing bar web according to claim 1 is opened the T section steel reinforced concrete hetermorphiscal column of quadrangle hole, it is characterized in that: described reinforcing bar skeleton cross section type such as comprises at limb and limb T section two classes such as not.

3. reinforcing bar web according to claim 1 is opened the T section steel reinforced concrete hetermorphiscal column of quadrangle hole, it is characterized in that: the steel plate after described reinforcing bar skeleton building form is welded or is punched by the T steel after punching at web and H shaped steel combines through welding.

4. reinforcing bar web according to claim 1 is opened the T section steel reinforced concrete hetermorphiscal column of quadrangle hole, it is characterized in that: described reinforcing bar web hole form comprises rectangle and square.

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