腐蚀对钢筋混凝土梁桥抗弯承载力的耦合影响  

Coupling Influence of Corrosion on Flexural Capacity of Reinforced Concrete Beam Bridge

作　　者：唐琳[1] 肖盛燮[1] 

机构地区：[1]重庆交通大学土木工程学院,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2015年第6期14-18,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：国家自然科学基金项目(50879097)

摘　　要：通过阐述裂缝、混凝土碳化和氯化对钢筋混凝土腐蚀的过程和影响,分析了由于腐蚀所导致的钢筋屈服强度下降、有效截面降低以及钢筋与混凝土协同工作能力降低的变化趋势和过程,并详细的讨论了钢筋屈服强度下架系数和协同工作系数的不同取值对钢筋混凝土梁抗弯承载力的耦合影响,提出并对比了几种有效防止或降低腐蚀对钢筋混凝土结构破坏的措施,能为实际的桥梁防腐工程提供一定的参考和借鉴。Through elaborating the corrosion process and corrosion influence of the cracks, concrete carbonation and chloride on the reinforced concrete, the change trend and process of the decrease of yield strength, the decrease of effective section of the steel bar as well as the decrease of the cooperative working capacity of the reinforced concrete caused by corrosion were analyzed. And the coupling influence of different values of yield strength coefficient and the cooperative working coefficient on the bearing capacity of reinforced concrete was discussed in detail. Several kinds of protective measures to prevent or reduce the damage of the reinforced concrete frame caused by corrosion were proposed, which provided a certain reference for the actual bridge anti-corrosion projects.

关 键 词：桥梁工程 钢筋混凝土安全 腐蚀 承载力 耦合影响 防护 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]