岩土工程学报2011，Vol.33Issue(3)：361-367,7.
爆炸荷载作用下饱和土中隧道的瞬态动力响应
Transient dynamic response of tunnels subjected to blast loads in saturated soil
摘要
Abstract
Using an analytical method, the dynamic response of a circular tunnel in the saturated soil is investigated.Assuming that the blast occurs in the center of the tunnel, a model is established using simplified blast loads.The motions of the liner are considered specially based on the Fliigge theory.The Biot's theory is used to describe the saturated soil.By introducing two potential functions, the analytical solutions of displacement and hoop stress induced by the blast loads are derived in Laplace transforms domain.Numerical results are obtained by inversion of Laplace transforms presented.The influences of permeable property of interface between the liner and soil on dynamic response of the tunnel are analyzed.Also, the influences of the parameters of the saturated soil and the relative rigidity of the liner are discussed.It is shown that the maximum stresses anddisplacements are both higher under impermeable conditions than those under permeable conditions.The parameter b has a significant effect on the amplitude of hoop stress.What's more, the attenuation of the responses becomes more apparent as the rigidity of liner increases.关键词
爆炸荷载/圆形隧道/Flügge壳体理论/Biot波动方程/动力响应分类
建筑与水利引用本文复制引用
蔡袁强,陈成振,孙宏磊..爆炸荷载作用下饱和土中隧道的瞬态动力响应[J].岩土工程学报,2011,33(3):361-367,7.基金项目
国家人防办人防科研基金项目(113202-E80802) （113202-E80802）
