Method for releasing temporary stiffening plate in local pressure area of orthotropic steel bridge deck slab

Abstract

The invention belongs to the technical field of bridges, discloses a method for releasing a temporary stiffening plate in a local pressure area of an orthotropic steel bridge deck slab, and aims to solve the problems that the workload is large after the stiffening plate is cut, and adverse effects are generated on the mechanical property of a steel beam. Through the design of the U-shaped notch, the purpose of releasing the stiffening plate is achieved, so that the method has the characteristic of small cutting amount; meanwhile, the adverse effect on the local stress form of the orthotropic bridge deck due to the existence of the stiffening plate is avoided, and the potential quality hazard caused by the fatigue damage problem of the steel bridge deck at the position is avoided; and moreover, through the design of the size and position of the U-shaped notch in the stiffening plate, the rigidity of the stiffening plate can be weakened, and the rigidity of the stiffening plate can be released to meet the deformation problem of the orthogonal special-shaped plate bridge deck slab.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a method for releasing a temporary stiffening plate in the partial pressure area of ​​an orthotropic steel bridge deck, which is mainly used for temporarily setting the stiffening plate when the orthotropic steel bridge deck bears local pressure during construction freed. Background technique [0002] Local stiffening (increasing stiffening plates in local compression areas) is the most important reinforcement method for orthotropic steel bridge decks to withstand large concentrated loads. During the construction process, local stiffening plates are used to meet the safety requirements of temporary pressure-bearing positions. After the partial pressure (local pressure) load is unloaded, the existing technology adopts the following two processing methods: [0003] 1. Completely retain the stiffeners: Since the stiffeners have the matching problem of changi...

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Problems solved by technology

[0005] In order to solve the problem of heavy workload and adverse effect on the mechanical properties of the steel girder after cutting the stiffening plate, the present invention provides a temporary stiffening plate release method in the partial pressure area of ​​the orthotropic steel bridge deck, which has the advantages of simple operation, It is convenient to remove the stiffener, and more importantly, it will not affect the mechanical properties of the steel beam

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