近断层浅埋隧道结构动力响应分析
Analysis of the Structural Dynamic Response of Near-fault Shallow-buried Tunnel
胡旭东1
作者信息
- 1. 中国铁建大桥工程局集团有限公司,天津 300300
- 折叠
摘要
目前,抗震设计规范对近断层场地地震动的定量标准化较粗糙,对断层场地与地下隧道结构之间的动力相互作用研究尚不清晰.因此,提出边界元-有限元混合方法(IBEM-FEM),用于深入研究近断层隧道结构动力响应.采用间接边界元法(IBEM)以高精度模拟近断层场地地震动,并在此基础上,结合黏弹性人工边界和等效荷载的外源波动输入方法,采用ANSYS有限元软件构建隧道及邻近土体数值分析模型并进行求解.通过对算例模型的验证,论证研究方法的可靠性.同时,进行断层距和断层倾角参数化分析,研究断层参数对隧道结构动力响应的影响.
Abstract
Currently,the quantitative standardization of seismic motion in near-fault sites in seismic design specifications is relatively rough,and the research on the dynamic interaction between fault sites and underground tunnel structures is still unclear.Therefore,a hybrid boundary element finite element method(IBEM-FEM)is proposed for in-depth study of dynamic analysis of near-fault tunnel structures.Using the indirect boundary element method(IBEM)to simulate ground motion near-fault sites with high accuracy,and based on this,combining viscous-spring artificial boundaries and external wave input methods of equivalent loads,ANSYS finite element software is used to construct numerical analysis models of tunnels and adjacent soil and solve them.Verify the reliability of the research method through the validation of the example model.At the same time,parameterization analysis of fault distance and fault dip angle is conducted to study the influence of fault parameters on the dynamic response of tunnel structures.
关键词
隧道/近断层/地震动/动力响应/边界元法/有限元法Key words
tunnels/near-fault/ground motion/dynamic response/boundary element method/finite element method引用本文复制引用
基金项目
天津市自然科学基金(23JCYBIC00390)
出版年
2024
NETL
NSTL
万方数据