摘要
该文介绍了一种钢筋混凝土桥梁安全性评估的方法。在对既有桥梁安全性评估时,根据钢筋混凝土桥梁特有的性质,对其进行可靠度计算分析。考虑了钢筋混凝土桥梁在使用过程中混凝土碳化、钢筋锈蚀引起的结构抗力退化,建立结构抗力退化模型。再根据评估基准期的不同,建立了时变荷载效应模型。最后运用JC法计算结构可靠度指标,以评估既有桥梁的结构可靠度。
The article introduces a method for the security evaluation of steel reinforced concrete bridge.The reliability of bridge is calculated and analyzed according to the special character of steel reinforced concrete bridge during the security evaluation of the existing bridges.The article considers the concrete carbonization and the structural resistance degradation caused by steel bar corrosion in the use process of steel reinforced concrete bridge,and establishes the resistance degradation model of structure.Based on the difference of evaluation base period,the time-dependent load effect model is established.Finally,the reliability index of structure is calculated by JC method so as to evaluate the structure reliability of the existing bridges.
出处
《城市道桥与防洪》
2013年第6期99-104,16,共6页
Urban Roads Bridges & Flood Control
关键词
钢筋混凝土
可靠度
混凝土碳化
钢筋锈蚀
抗力衰退模型
JC法
steel reinforced concrete,reliability,concrete carbonization,steel bar corrosion,resistance degradation model,JC method
