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传统的钢筋混凝土桥梁地震易损性分析一般只针对桥墩截面曲率等局部构件参数进行,且不考虑耐久性对结构性能的影响,具有一定的局限性.提出一种基于时变周期的桥梁地震易损性分析方法,能够计算复杂桥梁多维整体易损性.在此基础上,通过对钢筋黏结力和截面面积的修正,建立不同龄期桥梁有限元模型,可考虑耐久性降低对地震易损性的影响.通过基于周期和桥墩曲率的易损性分析,建立了考虑钢筋锈蚀影响的桥梁综合时变地震易损性分析方法.算例结果表明基于时变周期的锈蚀桥梁地震损伤值及相关易损性分析能准确细致地反映桥梁整体的损伤演变过程,在此基础上提出的不同服役年限下损伤指数比函数可以表征整体易损性的时变规律.“,”The current seismic vulnerability analysis of reinforced concrete bridge is generally carried out by analyzing the typical local component,and the static parameters such as bridge pier cross-section curvature are calculated,which cannot involve the effect of the durability on the structural performance.Thus,the traditional method has certain limitations.A bridge seismic vulnerability analysis method based on time-dependent periods is presented and the multidimensional and integral vulnerability of complex bridge can be calculated.The finite element models of RC bridge with different ages are established by modifying the cohesive force of steel bars and section area,and the effect of durability on the vulnerability is estimated.Based on the vulnerability analysis of bridge periods and curvature of piers,the comprehensive time-dependent seismic vulnerability analysis method considering the influence of reinforcement corrosion is established.According to a typical model analysis,it is verified that the damage value and the time-dependent seismic vulnerability based on periods can accurately reveal the damage evolution process of the total bridge,and the function on the damage value ratio can represent the time-dependent effect for the bridge with different service ages.