洞口段隧道结构动力特性分析  

Analysis of the Dynamic Behavior of the Portal Section of the Tunnel Structure

作　　者：苏惠[1] 孙立功[1] 王长丹[2] 

机构地区：[1]陕西铁路工程职业技术学院轨道工程系,陕西渭南714000 [2]同济大学交通运输工程学院,上海201804

出　　处：《国防交通工程与技术》2010年第5期51-53,共3页Traffic Engineering and Technology for National Defence

摘　　要：运用Newmark隐式时间积分有限元法,选用EI-Centro地震波,对洞口段隧道结构进行了二维地震响应数值模拟。得出了隧道结构的自振特性,地震波烈度和地震激励方向对隧道地震响应的影响规律:围岩性能越好,刚度越强,结构的自振频率越高;隧道结构在不同烈度地震中的响应是按地震波的最大加速度的比值增长。对研究洞口段隧道结构的抗震设计具有一定的参考价值。In the light of the Newmark Step-by-Step Implicit Integration Method,and with the EI-Centro seismic waves adopted,a two-dimension seismic response numerical simulation is made of the portal section of the tunnel,which showed the influential laws of the vibration characteristics of the tunnel structure,the influence of the seismic waves and the excitation on the tunnel seismic response：the better the performance of the surrounding rock,the greater the rigidity of the tunnel,the higher the vibration frequency of the tunnel structure;the response of the tunnel structure to the intensity of the seismic waves varies with the ratio of the maximum acceleration of the seismic wave.The paper may serve as a useful reference for the seismic design of tunnel structures.

关 键 词：地震波 有限元法 地震响应 隧道 

分 类 号：U451[建筑科学—桥梁与隧道工程]