CN103437501A - Corrugated web H-shaped section combination beam in C-shaped steel-concrete combination form - Google Patents

Abstract

The invention discloses a corrugated web H-section composite beam in the form of C-shaped steel-concrete combination, which comprises an upper flange, a lower flange and a web; the upper flange is composed of C-shaped steel with curling and poured concrete Composed together, the opening of the C-shaped steel is placed upwards, and end sealing plates are welded at both ends; the lower flange is a light rectangular steel pipe or a hot-rolled steel plate; the web is a corrugated plate. The invention has many characteristics such as good stability, strong fire resistance, steel and labor saving, simple and convenient construction, reduced engineering cost, etc., greatly improved comprehensive performance, huge application potential and wide application prospect.

Description

Composite beam with corrugated web and H-section in C-shaped steel-concrete composite form

technical field

The invention relates to the technical field of a novel building structure, in particular to an H-shaped cross-section composite beam with a corrugated web in the form of a C-shaped steel-concrete composite.

Background technique

In steel structures such as housing construction and bridges, hot-rolled I-beams, hot-rolled H-beams and welded H-beams are commonly used. Due to the relatively large amount of steel used in traditional I-beams and H-beams, some scholars have proposed a variety of all-steel corrugated web H-beams that can reduce the thickness of the web and do not need additional stiffeners to reduce the complexity of construction. . However, the compression flange of this all-steel H-shaped steel girder with corrugated webs is prone to local instability, which leads to the overall instability of the beam and the loss of its bearing capacity. Unless the steel plate is very thick, this situation will lead to an increase in steel consumption and increase its engineering cost, which is uneconomical. In addition, all-steel H-beams with corrugated webs have limited fire resistance.

Contents of the invention

The purpose of the present invention is to overcome the deficiency of the all-steel corrugated web H-shaped steel girder, and provide a C-shaped steel-concrete composite corrugated web H-shaped cross-section composite beam, which solves the problem of easy deformation and instability of the upper flange under pressure problems, improve its bearing capacity, stability and fire resistance, thereby improving the overall stability and fire resistance of the composite beam, and saving steel.

The technical scheme adopted in the present invention is: a composite beam with corrugated web H-shaped cross-section in the form of a C-shaped steel-concrete composite, including an upper flange, a lower flange and a web;

The upper flange is composed of C-shaped steel with rolled edges and the concrete poured inside. The opening of the C-shaped steel is placed upwards, and end sealing plates are welded at both ends to prevent it from flowing when pouring concrete, and to improve its integrity and steel. Interoperability with concrete;

The lower flange is light rectangular steel pipe or hot-rolled steel plate;

The web is a corrugated plate.

Preferably, the section of the corrugated plate includes sinusoidal waveform, trapezoidal waveform or rectangular corrugation.

As preferably, the upper flange, the lower flange and the web are all connected by welds. When assembling and welding, pay attention to keep the upper flange parallel to the lower flange, the web located therebetween is perpendicular to it, and the center of gravity of the web line coincides with the longitudinal axis of the beam.

The compression flange of the present invention adopts the combined form of rolled C-shaped steel-concrete, which improves its bearing capacity, stability and fire resistance, and saves steel; the compressed upper flange, corrugated web and light-weight The lower flanges of rectangular steel pipes are combined together to form an H-shaped cross-section composite beam. Such a C-shaped steel-concrete composite compression flange can make the C-shaped steel and concrete work together to bear the pressure together.

Beneficial effects: the upper flange of the present invention adopts the combined form of steel and concrete, without using thick steel plates, which not only effectively solves the problem that the upper flange of the conventional corrugated web steel beam is easy to buckle under pressure, but also improves its bearing capacity, stability and fire resistance , and can reduce the amount of steel used and reduce the cost of the project;

The web of the present invention adopts a corrugated web whose wave pitch and wave height can be changed, without additional stiffening ribs, which overcomes the disadvantage of low buckling resistance when the flat web is thin, reduces steel consumption, and reduces costs;

The lower flange of the present invention adopts a non-solid flange (light rectangular steel pipe), which can improve the utilization rate of steel, reduce the weight of the beam, save steel, and reduce engineering costs;

Due to the combination of steel and concrete, corrugated web and non-solid flange and other new technologies, the present invention makes the stress of the overall structure of the composite (composite beam) more reasonable, its stability is good, its fire resistance is strong, and it saves energy. Steel saves labor, construction is simple, and many advantages such as lower project cost are more prominent, the comprehensive performance is greatly improved, the application potential is huge, and the prospect is broad.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the present invention;

Fig. 2 is the sectional schematic view of trapezoidal corrugated web of the present invention;

Fig. 3 is the schematic cross-sectional view of the sinusoidal corrugated web of the present invention;

Fig. 4 is a schematic cross-sectional view of a rectangular corrugated web of the present invention.

Detailed ways

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

As shown in Figure 1: a C-shaped steel-concrete combined corrugated web H-shaped cross-section composite beam, including upper flange, lower flange 4 and web 3;

The upper flange is composed of C-shaped steel 1 with curling and the concrete 2 poured in it. The opening of the C-shaped steel 1 is placed upwards, and end sealing plates 5 are welded at both ends;

The lower flange 4 is a light rectangular steel pipe or a hot-rolled steel plate;

The web 3 is a corrugated plate.

As shown in Figures 2-4, the section of the corrugated plate includes sinusoidal waveforms, trapezoidal waveforms or rectangular corrugations.

The upper flange, the lower flange 4 and the web 3 are all connected by welds. When assembling and welding, pay attention to keep the upper flange and the lower flange 4 parallel, and the web 3 located therebetween is perpendicular to it, and the web 3 The center of gravity line coincides with the longitudinal axis of the beam.

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

Claims (3)

1. the corrugated web plate H-shaped section combination beam of C shaped steel-Combined concrete form, is characterized in that: comprise top flange, bottom flange and web;

Described top flange consists of jointly the C shaped steel with crimping and the concrete of building in it, and described C shaped steel opening upwards is placed, and two ends are welded with end-plate;

Described bottom flange is light-duty rectangular steel pipe or hot rolled steel plate;

Described web is a corrugated sheet.

2. the corrugated web plate H-shaped section combination beam of C shaped steel according to claim 1-Combined concrete form, it is characterized in that: described corrugated sheet section comprises sinusoidal waveforms, trapezoidal waveform or rectangle ripple.

3. the corrugated web plate H-shaped section combination beam of C shaped steel according to claim 1-Combined concrete form, it is characterized in that: between described top flange, bottom flange and web, all by weld seam, be connected, top flange is parallel with bottom flange, therebetween web is vertical with it, and the center of gravity line of web overlaps with the longitudinal axis of this beam.

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