考虑双参数的公路隧道易损性及概率地震损失  

Vulnerability and probabilistic seismic loss of highway tunnel considering two parameters

作　　者：苏琪 范进[1] SU Qi;FAN Jin(College of Sciences,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学理学院,南京210094

出　　处：《振动与冲击》2023年第13期235-241,共7页Journal of Vibration and Shock

基　　金：国家重点研发计划(2017YFB1201204)。

摘　　要：研究高速公路隧道基于双地震动强度参数的易损性及概率地震经济损失,对震前抗震防灾及震后急救修复意义重大。建立高速公路隧道设计基准期内概率地震经济损失评估框架,引入双地震动强度参数,采用增量动力法进行易损性分析,得到的易损性曲面与经验易损性曲线进行对比,验证了所建模型及易损性曲面的合理性;以此为基础,评估隧道设计基准期内的概率地震经济损失。结果表明,建立的基于双地震动强度参数下的易损性曲面能更准确地反映结构损伤,在高速公路隧道设计基准期内,轻微损伤造成的概率地震经济损失占比最大,中等损伤次之。该隧道概率地震经济损失评估框架可对高速公路隧道地震经济损失评估提供参考。It is of great significance to study vulnerability and probability of seismic economic loss of highway tunnels based on strength parameters of double ground motion intensity parameters for earthquake resistance and disaster prevention before earthquake and emergency aid and repair after earthquake.Here,a probabilistic seismic economic loss assessment framework within expressway tunnels'design reference period was established,double ground motion intensity parameters were introduced,and the incremental dynamic method was used to perform vulnerability analysis.The vulnerability surface obtained was compared with empirical vulnerability curve to verify the rationality of the model and vulnerability surface built here.Then,the probabilistic seismic economic loss within tunnel design reference period was evaluated.The results showed that the vulnerability surface built based on double ground motion intensity parameters can more accurately reflect structural damage;within design reference period of expressway tunnel,the proportion of the probabilistic seismic economic loss caused by minor damages is the largest,followed by moderate damages;the proposed tunnel probabilistic seismic economic loss assessment framework can provide a reference for seismic economic loss assessment of expressway tunnels.

关 键 词：高速公路隧道 地震动强度参数 增量动力分析 易损性曲面 概率地震经济损失 

分 类 号：U459.3[建筑科学—桥梁与隧道工程]