基于时变可靠度衰变预测的普通钢筋混凝土桥梁预防性养护模型研究

摘要

为探讨普通钢筋混凝土桥梁时变可靠度的衰变规律，建立普通钢筋混凝土桥梁的预防性养护模型。以武汉市公路管理处管理养护的部分省国道桥梁为研究对象，采用有限元与 Monte-Carlo 相结合的结构时变可靠度分析方法，考虑混凝土、钢筋等材料的疲劳退化，对桥梁结构时变可靠度规律进行了探讨，在此基础上，建立了基于结构时变可靠度衰变预测的普通钢筋混凝土桥梁预防性养护模型。%In order to discuss the decay law of time-varying reliability of reinforced concrete bridge and establish preventive maintenance model,taking some provincial or national highway bridges managed by Wuhan city highway administration as research object,the reliability analysis method combining fi-nite element with Monte-Carlo is used to discuss the time-dependent reliability law of bridges with consideration of material fatigue degradation of concrete,steel and so on.Moreover,the preventive maintenance model of ordinary reinforced concrete bridges based on time-dependent reliability decay prediction is established.