隧道工程地震易损性分析研究综述与展望

Research review and future prospect of the seismic fragility analysis for tunnel engineering

易损性分析是隧道工程领域防震减灾研究的重要方法。首先,详细综述了国内外隧道地震易损性研究历史与现状;其次,归纳了国内外隧道地震易损性分析主要方法,并总结了各种方法的实际适用性;接着,提出了隧道地震易损性评估步骤,并且讨论了以数值模拟为主要手段的理论易损性曲线建立中的3个关键内容:(1)输入参数确定;(2)破坏状态分级;(3)相关不确定性参数计算;最后,指出该领域一些亟待解决的问题和未来研究发展的方向。结果表明:隧道地震易损性分析能通过考虑相关不确定性因素,反映了隧道在地震荷载作用下的性能,有利于未来的风险评估和损失估算,对基于性能的隧道抗震设计的发展具有重要意义。

Fragility analysis is an important method for earthquake disaster prevention and reduction for Tunnel Engineering.Firstly,the history and state-of-the-art of the fragility analysis of tunnels are reviewed in detail.Secondly,the main methods of seismic fragility analysis of tunnels are summarized,and the practical applicabilities of various methods are summarized.Then,the procedure of seismic fragility analysis for tunnels are proposed,and three key points in the establishment of theoretical fragility curve by numerical simulation are discussed:(1)Determination of input parameters;(2)Classification of failure states;(3)Calculation of related uncertain parameters.Finally,some problems need to be solved urgently in this field and the direction of future research are pointed out.The review shows that the seismic fragility analysis of tunnels can reflect the performance of tunnels under seismic loads with considering relevant uncertainties,which is conducive to future risk assessment and loss estimation,and it is of great significance to the development of performance-based seismic design method of tunnels.