岩土工程学报2024，Vol.46Issue(z2)：21-25,37,6.DOI:10.11779/CJGE2024S20033
随机地震作用下隧道动力响应的概率密度演化分析
Probabilistic density evolution analysis of dynamic response of tunnels under stochastic earthquakes
摘要
Abstract
Due to the stochastic characteristics of ground motion,it is difficult for the deterministic method to completely consider the complex stochastic characteristics of ground motion.It is of great practical significance to study the seismic response of tunnel structures by using the stochastic analysis method for the seismic design of underground structures.In this study,the research object is a typical circular tunnel structure in soft soils.First,a nonlinear interaction analysis model for the underground soil tunnel in a typical project site is established.Then,a random seismic model is used to generate a non-stationary seism that matches the requirements of the seismic design code.A probability density evolution analysis method is introduced into the seismic analysis of the tunnel structure,which initially explores the evolution characteristics of the probability density of its seismic performance.Using the tunnel inclination angle as the seismic performance index,the probability density function of the tunnel structural response is solved by using the probability density evolution method,and the exceedance probabilities of the tunnel inclination angle are obtained when the tunnel has no damage,slight damage,moderate damage and severe damage.The results show that the exceedance probabilities of the tunnel inclination angle in the four damage states are 98.88%,86.10%,30.90%and 3.70%,respectively.The proposed probability density evolution method can accurately obtain the instantaneous probability information of the tunnel inclination angle,and provide a new prospect for the study on the probability evolution characteristics of seismic performance of the tunnel structures.关键词
隧道结构/概率密度演化方法/随机地震/动力响应/超越概率Key words
tunnel structure/probability density evolution method/stochastic earthquake/dynamic response/exceedance probability分类
建筑与水利引用本文复制引用
张冬梅,郭力,申轶尧,黄忠凯..随机地震作用下隧道动力响应的概率密度演化分析[J].岩土工程学报,2024,46(z2):21-25,37,6.基金项目
国家重点研发计划课题(2022YFC3800905) （2022YFC3800905）
国家自然科学基金项目(52108381,52238010,52090082) （52108381,52238010,52090082）
上海市"科技创新行动计划"优秀学术/技术带头人计划项目(22XD1430200) （22XD1430200）
同济大学学科交叉联合攻关项目(2022-3-ZD-07) （2022-3-ZD-07）
青海省科学技术厅基础研究计划项目(2023-ZJ-926M) （2023-ZJ-926M）
