Prefabricating construction method of steel and superhigh performance concrete combined beam of steel rib plate type bridge floor

Abstract

The invention relates to the technical field of combined beams, in particular to a prefabricating construction method of a steel and superhigh performance concrete combined beam of a steel rib plate type bridge floor. The method includes the following steps of firstly, machining, manufacturing and installing a steel main beam; secondly, machining and installing a zigzag-form steel plate; thirdly, pouring a superhigh performance concrete bridge floor plate; fourthly, curing superhigh performance concrete, drawing out an air bag or a foam plate before high-temperature curing and after superhigh performance concrete reaches the demolding strength; fifthly, installing a combined bridge floor plate; sixthly, connecting transverse seams of the combined bridge floor plate; seventhly, constructing a fence or an anti-collision wall; eighthly, paving the constructed bridge floor. The combined beam formed through the prefabricating construction method can effectively reduce the stress concentration degree of a fatigue sensitive part and improve the fatigue performance of the orthotropic steel bridge floor plate.

Description

technical field [0001] The invention relates to the technical field of composite beams, in particular to a prefabricated construction method of a steel-ultra high-performance concrete composite beam with a steel-ribbed bridge deck. Background technique [0002] The orthotropic steel bridge deck has the characteristics of light weight, high strength, fast construction and beautiful shape, and is favored by bridge designers at home and abroad. The long-span bridges in Europe, North America, Asia and many other countries basically adopt Anisotropic steel bridge deck. However, due to the complexity of the structure of the orthotropic steel deck, the residual stress produced by various welding, the initial defects of the structure itself, the repeated action of the vehicle load, and the construction quality, the orthotropic steel deck is prone to occur. Fatigue damage. However, the thickness and stiffness of the bridge deck pavement are thin, so that the orthotropic steel deck ...

AI Technical Summary

Problems solved by technology

Therefore, more steel-UHPC composite decks are equivalent to adding a layer of UHPC to the original orthotropic steel deck, which further increases the engineering cost of the steel bridge.

At the same time, the parts with more welds such as the roof and the longitudinal stiffeners, longitudinal stiffeners and transverse ribs still have fatigue risks

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