周华强¹，段成晓¹，常立新²，徐德新¹，王  斌¹
    (1 武汉大学土木建筑工程学院，武汉430072; 2 武汉市路桥收费管理中心，武汉430000)

[摘要] 在研究既有钢筋混凝土桥梁加固后时变可靠指标计算方法的基础上，结合工程实例，应用ANSYS软件建立加固后桥梁的有限元分析模型，并采用响应面法对基于挠度分析的正常使用极限状态下结构的时变可靠指标进行了计算，对加固后桥梁结构剩余使用寿命进行了预测。
[关键词] 加固后钢筋混凝土桥梁；时变可靠指标；响应面法；有限单元法

Study on the time-dependent reliability index of consolidated reinforced concrete bridges based on response surface method
Zhou Huaqiang¹, Duan Chengxiao¹, Chang Lixin², Xu Dexin¹, Wang Bin¹
(1 Wuhan University school of Civil Engineering, Wuhan 430072, China; 2 Wuhan Bridge toll Management Center, Wuhan 430000, China)

Abstract: The time-dependent reliability index of the consolidated reinforced concrete bridges is investigated.Afinite element model for the consolidated Wuhan Second Changjiang River Bridge is established. Based on the response surface method, the time-dependent reliability index of serviceability linut state is calculated and the residual service life is predicted.
Keywords: consolidated concrete bridge in service; time-dependent reliability index; response surface method; finite element method