Steel pipe-steel plate combined type corrugated steel web

Abstract

The invention discloses a steel pipe-steel plate combined type corrugated steel web. The steel pipe-steel plate combined type corrugated steel web comprises at least two steel plates and at least onesteel pipe, wherein at least one side of the opposite sides of each steel plate is connected with one steel pipe, the two opposite sides of each steel pipe are correspondingly connected with at leastone steel plate, all the steel plates are arranged in parallel, the axes of all the steel pipes are arranged in parallel, and are located in the same plane; and the steel plates are connected to the side wall of the steel pipe; different types of thin-walled steel pipes can generate different types of buckling deformation under the action of external force perpendicular to the pipe wall, the steelplate-steel plate combined type corrugated steel web just uses the buckling deformation of the thin-wall steel pipes under the action of the longitudinal force for reducing the constraint effect of the whole web plate on a top bottom plate of a combined box girder bridge, reducing the influence of the shrinkage and creep of the top bottom plate concrete part, and improving the longitudinal prestress efficiency; and meanwhile, the thin-wall steel pipes in such combined type web plate further plays a stiffening role on a flat steel plate, and improvs the shearing buckling performance of the steel plate.

Description

technical field [0001] The invention relates to a steel web, in particular to a steel pipe-steel plate combined steel web. Background technique [0002] In 1975, the French company Campenon Bernard proposed the idea of ​​replacing flat steel webs in steel-concrete composite bridges with corrugated steel webs, and built the world's first corrugated steel web PC (Precast Concrete, concrete prefabricated bridge) in 1986. pieces) Composite girder bridge - Cognac bridge. This type of bridge uses the wrinkle effect of the corrugated steel web to reduce the longitudinal restraint of the steel plate received by the concrete shrinkage and creep of the top and bottom slabs, greatly improving the efficiency of longitudinal prestressing, and using the folded shape of the steel web to improve the web The shear buckling strength of the slab, so once it was proposed, it was quickly recognized by the bridge engineering circles of various countries, and a new type of steel-concrete composit...

AI Technical Summary

Problems solved by technology

[0010] 1. Corrugated steel webs need to be molded or stamped with special equipment, and the production cost is high, which is the main factor restricting the processing efficiency and economy of this type of bridge;

[0011] 2. After the corrugated steel web forms a fold line in the horizontal direction, it increases the difficulty of web extension and welding construction between the web and the flange plate. At the same time, a large number of folded corners are easy to accumulate debris, which increases the difficulty of anti-corrosion and maintenance;

[0012] 3. The lower edge of the corrugated steel web of the long-span variable height beam is a space curve, and the cutting of the web and the welding of the web and the lower flange are more complicated. Therefore, in engineering practice, in order to reduce such difficulties, the When it is longer than 60m, corrugated steel web PC composite bridges are usually made into equal-height beams, which will affect the aesthetics and the amount of engineering materials;

[0013] 4. When the height of the long-span corrugated steel web PC composite bridge is high, the shear buckling stability of the corrugated steel web is prominent, and it needs to be lined with concrete, the connection is complicated, and the shear distribution mechanism is not clear

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