防灾减灾工程学报2025，Vol.45Issue(5)：1042-1051,10.DOI:10.13409/j.cnki.jdpme.20250215001
倾滑断层动态破裂下衬砌隧道动力响应宽频高效模拟
Broadband and Efficient Simulation of Dynamic Response of Lined Tunnels under Dynamic Rupture of Dip-slip Faults
摘要
Abstract
Compared with far-field ground motions,near-fault ground motions exhibit characteristics such as hanging wall effects and velocity pulses,which can significantly exacerbate seismic damage to underground structures.The fast multipole method-indirect boundary element method-finite element method(FMM-IBEM-FEM)was proposed to simulate the entire process of dip-slip fault dynamic rup-ture and tunnel response.The FMM-IBEM was employed to simulate fault rupture and large-scale site ground motions,leveraging its advantages of high solution accuracy and low computational stor-age requirements.The FEM was used for refined simulation of tunnels and surrounding near-surface domain.By applying viscoelastic artificial boundaries,the ground motions excited by fault dislocation were converted into equivalent nodal forces imposed on boundary nodes,enabling the stress and dis-placement transfer between the FMM-IBEM and FEM computational domains.Based on the pro-posed method,the effects of fault distance and fault dip angle on the seismic response of lined tunnels near dip-slip faults were investigated.The results showed that under the horizontal component of seis-mic response,peak circumferential stress in the tunnel lining occurred at the spandrel and arch foot,while under the vertical component,the peak appeared at the haunch and crown,with significant resid-ual stress observed.When the fault distance was 2 000 m,the peak circumferential stress on the inner wall of the tunnel arch foot under the horizontal component of seismic response decreased by 54%compared to that at a fault distance of 0 m.Ground motions generated by faults with a dip angle of 90° had the most significant impact on the lined tunnel.However,special attention should also be paid to the dynamic response of lined tunnels in sites with dip-slip faults of less than 45°.关键词
衬砌隧道/动力响应/倾滑断层/边界元法/有限元法Key words
lined tunnel/dynamic response/dip-slip fault/boundary element method/finite element method分类
交通工程引用本文复制引用
刘佳乔,刘中宪,孟思博..倾滑断层动态破裂下衬砌隧道动力响应宽频高效模拟[J].防灾减灾工程学报,2025,45(5):1042-1051,10.基金项目
国家自然科学基金项目(52278516)、天津市制造业高质量发展专项资金项目(23ZGCXQY00010)资助 （52278516）
