【摘要】 用动力有限元法研究了偏压隧道洞口横向边坡在水平地震、垂直地震以及水平和垂直地震同时作用下的全时程动力反应规律。在动应力计算结果的基础上,叠加静应力场,分析三种工况下最危险滑动面的动力安全系数时程,并采用平均动力安全系数法和地震永久性变形评价洞口横向边坡的地震动力稳定性,最终建立了偏压隧道洞口横向边坡的地震动力响应分析及稳定性评价模型。更多还原

【Abstract】 The earthquake response of transverse slope at secund tunnel portal is first studied with dynamic finite element method under conditions of horizontal,vertical and both horizontal and vertical input,and then the dynamic safety factors of the most dangerous slide face which vary with time are researched after adding the field of static stress.For the purpose of dynamic stability evaluation,the total average dynamic safety factor and the permanent displacement are brought forward and used in this paper.At last,the model of dynamic response analysis and stability evaluation is built for transverse slope at secund tunnel portal.更多还原