考虑不同地震危险性函数下的隧道震损评估  

Seismic Damage Assessment of Tunnels Considering Different Seismic Hazard Functions

作　　者：黄楚天 黄蔚 魏懿 肖桂元 于啸波[1,2] Huang Chutian;Huang Wei;Wei Yi;Xiao Guiyuan;Yu Xiaobo(Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering,Ltd.Guilin,Guangxi 541000,China;School of Civil Engineering,Guilin University of Technology,Guilin,Guangxi 541004,China;Wuhan Metro Group Co.,Ltd.,Wuhan,Hubei 430070,China;China Nonferrous Metals Changsha Survey and Design Institute Co.,Ltd.,Changsha,Hunan 410001,China)

机构地区：[1]广西岩土力学与工程重点实验室,广西桂林541000 [2]桂林理工大学土木工程学院,广西桂林541004 [3]武汉地铁集团有限公司,湖北武汉430070 [4]中国有色金属长沙勘察设计研究院有限公司,湖南长沙410001

出　　处：《黑龙江工业学院学报(综合版)》2025年第2期132-138,共7页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：国家自然科学基金项目“地下水-车辆荷载耦合作用下浅覆盖型岩溶顶板-路基协同损伤时空演化”(项目编号:52169022);广西岩土力学与工程重点实验室基金项目“岩溶顶板地震易损性分析”(项目编号:桂科能19-Y-21-5);桂林理工大学博士科研基金项目“含溶洞场地地震反应研究”(项目编号:GUTQDJJ2019043)。

摘　　要：研究盾构隧道概率地震经济损失对城市防灾储备及震后应急修复具有重大意义。选取了峰值加速度PGA作为地震动强度参数分析,以椭圆度作为性能评价指标,采用增量动力法进行易损性分析得到盾构隧道地震易损性曲线。结合地震危险性,分析了隧道概率地震损伤风险,并估计了盾构隧道的年期望经济损失。研究结果表明,以椭圆度作为损伤指标能较准确地反映结构损伤;不同的地震危险性函数对隧道的经济损失有明显影响,采用幂函数拟合时,年期望经济损失曲线在整个范围内均高于极值拟合结果,即幂函数拟合模型在评估较大地震风险时相对更为保守,对应的年期望经济损失曲线明显更大。该研究成果可对如何使用椭圆度来进行盾构隧道的地震经济损失评估,以及研究地震危险性对评估盾构隧道在地震中的经济损失的影响提供参考。Studying the probability of earthquake induced economic losses in shield tunnels is of great significance for urban disaster prevention and emergency repair after earthquakes.This article selects peak acceleration PGA as the seismic intensity parameter for analysis,uses ellipticity as the performance evaluation index,and uses incremental dynamic method for vulnerability analysis to obtain the seismic vulnerability curve of shield tunnel.Based on the seismic hazard,the probability of seismic damage risk in tunnels was analyzed,and the annual expected economic loss of shield tunnels was estimated.The research results indicate that using ellipticity as a damage indicator can accurately reflect structural damage;different earthquake hazard functions have a significant impact on the economic losses of tunnels.When using power function fitting,the annual expected economic loss curve is higher than the extreme value fitting result throughout the entire range,indicating that the power function fitting model is relatively more conservative in evaluating larger earthquake risks,and the corresponding annual expected economic loss curve is significantly larger.The research results of this article can provide reference for how to use ellipticity to evaluate the economic losses of shield tunnels during earthquakes,as well as to study the impact of earthquake hazard on evaluating the economic losses of shield tunnels during earthquakes.

关 键 词：盾构隧道 地震危险性 易损性 椭圆度 经济损失 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]