To explore the performance degradation of corrugated steel web composite box girder in chloride salt environments,reducing load-carrying capacity,based on the relevant prediction model,the time-varying model of concrete and the Constitutive relationships of reinforcement and steel with varying degrees of corrosion were estab-lished and introduced into the numerical simulation to develop the time-varying deterioration model of the corrugated steel web girder.The corrugated steel web girder's ultimate load-carrying capacity and interfacial slip were investi-gated at different stages of its life.The results showed that the ultimate load-carrying capacity of the corrugated steel web box girder increased slightly within the first 10 years of its life,and after that,the decline in ultimate load-carrying capacity was relatively significant in the early stage and more minor in the later stages,with the de-cline rate exceeding 28.6％after 70 years.The interface did not exhibit large slip values before damage occurred.Therefore,using Twin-PBL shear keys in corrugated steel web composite box girders is reasonable and feasible.
关键词
波形钢腹板/组合箱梁/氯盐环境/极限承载力/界面滑移
Key words
Corrugated steel web/Composite box beam/Chloride salt environment/Ultimate load capacity/Interface slip
维普
万方数据