地震工程学报2016，Vol.38Issue(6)：889-895,7.DOI:10.3969/j.issn.1000-0844.2016.06.0889
地铁列车荷载作用下黏弹性地基动应力特征分析
Dynamic Stress Characteristics of Viscoelastic Foundations under Subway Train Loads
摘要
Abstract
This paper presents a comparative evaluation of elastic and viscoelastic solutions to identify more suitable and practical engineering solutions.Based on the viscoelastic solutions of a Kelvin's space half-infinite body,as an example,we analyzed the dynamic stress response under moving subway loads to illustrate the characteristics of dynamic stress,the stress path,and the principal stress axis rotations. By applying two solutions,we found the numerical results for the development trends of the dynamic stress state and principal stress axis rotation to be similar.We also found discrepancies in the dynamic stress of the ultimate state and stress path.Additionally,our results indicate that a viscoelastic solution is more applicable to actual working cases of long-term metro tunnel deformation in soft soil areas. Moreover,according to our analysis of viscoelastic solutions of dynamic stress characteristics under single-wheel loads,we found different feature coefficients to have different influences on stress characteristics.关键词
地铁/黏弹性地基/应力状态/应力路径/主应力轴旋转Key words
subway/viscoelastic foundation/stress state/stress path/principal stress axes rotation分类
建筑与水利引用本文复制引用
丁智,李丹薇,谢宗星,魏新江..地铁列车荷载作用下黏弹性地基动应力特征分析[J].地震工程学报,2016,38(6):889-895,7.基金项目
浙江省自然基金项目(LQ16E080008) （LQ16E080008）
国家自然科学基金项目(51278463,51508506) （51278463,51508506）
