Steel-concrete combined box beam

Abstract

The invention discloses a steel-concrete combined box beam which comprises two steel webs, a steel bottom plate, a diaphragm plate, a concrete layer, multiple stiffening ribs and a steel top plate, wherein the two steel webs and the steel bottom plate form a box chamber; the diaphragm plate is horizontally arranged at the upper part in the box chamber to divide the box chamber into an upper box chamber and a lower box chamber; the concrete layer is filled in the upper box chamber; the multiple stiffening ribs are arranged on the bottom plate in the lower box chamber; and the steel top plate is horizontally arranged on the top surface of the upper box chamber. In the steel-concrete combined box beam disclosed by the invention, the concrete combined top plate composed of the steel top plate, the steel webs, the diaphragm plate and the concrete layer bears pressure, and the lower bottom plate and multiple stiffening ribs bear the tension; and the steel-concrete combined box beam has the characteristics of high bearing capacity, high rigidity, good integrity and the like, greatly improves the structural stability, can give full play to the performance of the materials, is convenient to transport and hoist, and has short construction period, high efficiency and obvious economic benefits. Moreover, through the box beam, the height of the cross section of the box beam can be reduced, and the bridge appears more concise and beautiful.

Description

technical field [0001] The invention belongs to the technical field of bridge structure design and construction, in particular to a steel-concrete composite box girder. Background technique [0002] Concrete is a material that is weak in tension but strong in compression. From the principle of concrete hoops, it can be known that when the lateral displacement of concrete is restrained, its compressive capacity will be improved. The steel-concrete composite member is made by filling the thin-walled steel plate with concrete material. When it is under pressure, because the steel plate acts as a hoop for the surrounding concrete, the compressive capacity of the concrete is greatly improved. At the same time, because the thin-walled steel plate is filled with concrete materials, the local stability of the thin-walled steel plate has been improved. In this way, the two materials can make up for each other's shortcomings and give full play to each other's strengths. It is an idea...

AI Technical Summary

Problems solved by technology

Simply supported beams are often used in bridge construction as a concrete bridge structure with obvious stress. However, for prefabricated concrete simply supported beam bridges, the most economical and reasonable span is less than 20m, so the scope of application is limited. Restrictions; although the span of the prestressed concrete simply supported girder bridge has reached 50-70 meters, the disadvantage is that the construction is complicated and the construction period is long

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