摘要
利用快速腐蚀构件、实桥构件承载力试验与桥梁破坏性试验,通过外观检测、挠度测试等手段,揭示了腐蚀环境下RC桥梁的退化机理;考虑腐蚀参数的随机性和时变性,建立了RC桥梁在腐蚀环境下的时变可靠度模型,计算了RC桥梁在大气环境下的失效概率和锈胀开裂比例;在此基础上,结合维修加固成本模型,构造了RC桥梁维修加固多目标优化的目标函数和约束条件。利用桥面板的维修加固实践,证明方法的合理性。
The rapid corrosion of components,real bridge component bearing capacity test and destructive test of bridge were used to reveal the degradation mechanism of the RC bridge under corrosive environment by means of surface detection,deflection test and so on. Considering the randomness and time-varying of corrosion parameters,RC bridge model was established in the time-varying reliability of corrosive environment,and the failure probability and the corrosive cracking ratio of RC bridge in the atmosphere environment of were calculated. On this basis,with the consideration of maintenance cost model,RC bridge maintenance and reinforcement of multi-objective optimization objective function and constraint conditions were constructed. The bridge deck's maintenance practice was used to prove the rationality of the proposed method.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2013年第6期1123-1127,1132,共6页
Journal of Chongqing Jiaotong University(Natural Science)
基金
国家自然科学基金项目(51008037
51178060)
湖南省自然科学基金项目(12JJ6050)
湖南省科技计划项目(2012FJ4124)
关键词
RC桥梁
退化机理
可靠性评估
维修策略多目标优化
RC bridge
degradation mechanism
reliability assessment
multi-objective optimization of maintenance strate-gies
