Simply supported and continuous corrugated web steel box-concrete composite beam

Abstract

The invention relates to the field of bridges, and in particular relates to a simply supported and continuous corrugated web steel box-concrete composite beam. The simply supported and continuous corrugated web steel box-concrete composite beam comprises a plurality of prefabricated corrugated web steel box-concrete composite beams, the prefabricated corrugated web steel box-concrete composite beams are connected through steel box type cross beams and K-shaped steel cross beams in the transverse bridge direction, composite beam reinforced concrete top plates are connected through cast-in-place reinforced concrete plates, cast-in-place reinforced concrete side wing plates are poured on the outer sides of the composite beam reinforced concrete top plates, the continuous ends of the multiple prefabricated corrugated web steel box-concrete composite beams in the longitudinal bridge direction are connected through cast-in-place concrete connecting sections, the cast-in-place concrete connecting sections are connected with open corrugated web steel boxes through studs, supports are arranged below the cast-in-place concrete connecting sections, and the simply supported and continuous corrugated web steel box-concrete composite beam is formed. The advantages of corrugated steel webs and the excellent stress characteristic of continuous beams are fully utilized, the self weight is light, machining and manufacturing are easy, the construction quality is guaranteed, the bridge construction speed is high, and very wide practicability is achieved.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a steel box-concrete composite beam with a simply supported and then continuous corrugated web. Background technique [0002] The bottom plate of the traditional corrugated steel web composite box girder is a cast-in-place concrete slab and equipped with external prestressing. During construction, there are complex procedures and processes such as steel bar installation, connection between the concrete slab and corrugated steel web, and prestressing construction. The construction is difficult. Big, quality is not easy to guarantee. The webs of the commonly used steel-concrete composite box girders are straight steel webs, and the stability of the steel webs is poor. Therefore, more stiffeners are provided, which increases the weight and cost of the bridge, and is difficult to apply in large quantities. Ordinary steel-concrete composite continuous girder bridges generally do not set connec...

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Problems solved by technology

[0002] The bottom plate of the traditional corrugated steel web composite box girder is a cast-in-place concrete slab and equipped with external prestressing. During construction, there are complex procedures and processes such as steel bar installation, connection between the concrete slab and corrugated steel web, and prestressing construction. The construction is difficult. Large, quality is not easy to guarantee

The web of the commonly used steel-concrete composite box girder is a straight steel web, and the stability of the steel web is poor, so more stiffeners are set, which increases the weight and cost of the bridge, and is difficult to apply in large quantities

Ordinary steel-concrete composite continuous girder bridges generally do not set connections at the continuous pier, because the steel structure processing in the steel-concrete composite beam must have certain processing errors, and the deformation of the composite beams on both sides is also different, while the steel plate in the steel structure It is relatively thin, so it is difficult to connect the composite beams on both sides. At the same time, a support must be provided at the connection. There are more measures for the installation and reinforcement of the support, so the connection is even more difficult. In addition, for continuous beams, the beams at the continuous pier The internal force of the section is relatively large, which is the key part of the structure. It is better not to set the connection. Therefore, the connection part of the steel-concrete composite continuous beam is generally set at the edge of the bridge span, so that the ordinary steel-concrete composite beam cannot be simply supported first and then simply supported. Continuous construction is not convenient for mass application

Ordinary span concrete bridges have low cost, can be prefabricated and erected, and can be simply supported first and then continuously constructed. They are very convenient and adaptable, so they have been widely used in my country. However, with the development of national society, bridge construction emphasizes green environmental protection and sustainable development, while the overall environmental pollution level of concrete bridges is relatively high and cannot be recycled. Therefore, in recent years, the state has vigorously advocated the development of steel structure bridges

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