爆炸与冲击2024，Vol.44Issue(8)：60-71,12.DOI:10.11883/bzycj-2023-0454
反平面线源荷载作用下浅埋圆形非完全粘结隧道动力响应研究
Research on the dynamic response of shallow-buried circular non-complete bonded tunnels under anti-plane line source loading
摘要
Abstract
The scattering of seismic waves by shallow-buried underground structures has significant theoretical value in the engineering field.However,previous studies have mainly focused on the case of plane waves or the case of complete bonding between lining and surrounding rock,with little consideration of the effects of source distance and non-complete bonding between lining and surrounding rock.In order to deepen the understanding of the influence of source distance and non-complete bonding on seismic wave scattering,the series solution of the dynamic response of shallow-buried circular non-complete bonded tunnels under the loading of anti-plane line source was derived based on the displacement discontinuity model,wave function expansion method,Graf formula and mirror method.The accuracy of the obtained solution was verified by the relationship between the residuals of the inner and outer boundary conditions of the lining and the number of truncated terms in the series solution.By systematically analyzing the parameters of this series solution,the influence of factors such as the contact stiffness between lining and surrounding rock,lining modulus,lining thickness,tunnel depth and source distance on the displacement and circumferential shear stress on the inner surface of the lining was discussed.The results show that the contact stiffness between lining and surrounding rock has a significant influence on the dynamic response of the tunnel,especially in cases with relatively low contact stiffness,where the amplitude of the dynamic response of the tunnel can be very large.Increasing the lining modulus reduces the displacement but increases the circumferential shear stress.Increasing the lining thickness can simultaneously reduce the displacement and circumferential shear stress.As the tunnel depth increases,the maximum displacement and circumferential shear stress on the inner surface of the lining shifts towards the apex of the tunnel.Increasing the horizontal distance between the line source and the tunnel increases the relative amplitude of the tunnel's back wave side.关键词
浅埋隧道/地震波散射/反平面线源/波函数展开法Key words
shallow-buried tunnel/seismic wave scattering/anti-plane line source/wave function expansion method分类
数理科学引用本文复制引用
李志文,李潜,徐斌,李晓锋,李海波..反平面线源荷载作用下浅埋圆形非完全粘结隧道动力响应研究[J].爆炸与冲击,2024,44(8):60-71,12.基金项目
江西省教育厅科学技术研究项目(GJJ2201511) （GJJ2201511）
江西省2017年优势科技创新团队重点项目("5511"工程专项)(20171BCB19001) （"5511"工程专项）
