岩土力学2012，Vol.33Issue(1)：185-190,6.
冲击荷载作用下软土隧道结构热-流-固耦合动力响应分析
Coupling thermo-hydro-elasto dynamic response of tunnel structure-saturated soil under thermo-mechanical shock
摘要
Abstract
Explosion effect on a structure can be considered as a corporate results from the force shock and the heat shock. Based on the Biot's theory of thermodynamics, the dynamic response of tunnel lining embedded in saturated thermoelastic medium, due to an internal excitation (heat/mechanical shock), is investigated theoretically by using the presented coupling the thermo-hydro-elastodynamic model. Using Flügge theory of thin shell and the general solution of thermo-hydro-elastodynamic model, the motion equation of tunnel lining is obtained; and the solutions of stress, displacement and pore pressure are derived by using the consistency condition at the interface of lining and soil in the domain of Laplace transformation. Numerical results are obtained using inverse Laplace transform and are used to analyze the effect of the internal excitation on stress, displacement and pore pressure for different rigidities and thicknesses. The results show that, under shock of blast, the lining acted as a good barrier for the surrounding soil, and bigger rigidity have better protection effect; the stresses on the interface between lining and soil decreased with lining rigidity increase, and bigger rigidity lead to faster stresses decrease; the rigidity and thickness of lining influence the displacement response evidently, but influence temperature response lightly.关键词
热力冲击/隧道结构/热流固耦合/动力响应Key words
thermo-mechanical shock/tunnel structure/coupling thermo-hydro-mechanics/dynamic response分类
交通工程引用本文复制引用
汪鹏程,孙玲玲,开前正..冲击荷载作用下软土隧道结构热-流-固耦合动力响应分析[J].岩土力学,2012,33(1):185-190,6.基金项目
国家自然科学基金资助项目(No.40902089,No.51178227) （No.40902089,No.51178227）
宁波市自然科学基金资助项目(No.2010A610081). （No.2010A610081）
