【摘要】 在对地下结构动力响应现状分析的基础上,运用有限单元法和Newmark直接积分法,研究了不同峰值加速度条件下立体交叉隧道群的位移分布与变化规律,并对其动力响应规律进行了分析与比较。结果表明,随着地震波的增强,立体交叉隧道的变形依次经历弹性阶段、塑性阶段、失稳破坏三个阶段;隧道变形主要由竖向位移引起,在实际工程中,可以将竖向位移作为隧道安全的一个控制因素。同时,通过实例验证了隧道设计的合理性。更多还原

【Abstract】 Based on the dynamic response analysis of current status of the underground structure,with the application of finite element method and Newmark immediate integration,the distribution and variation rule of the displacement of the three-dimensional crossing tunnel under different peak acceleration rate are analyzed.Research on its dynamic response rule also concludes that the deformation of the three-dimensional crossing tunnel goes through elastic phase,plastic phase,and instability and failure phase successively following the increase of seismic wave.As vertical displacement is the major cause of tunnel deformation,it can be served as a controlling factor of tunnel safety in actual construction.In addition,the rationality of tunnel design is also verified by real examples.更多还原