高速列车振动荷载下大断面隧道结构动力响应分析.pdfVIP

第24 卷 第23 期 岩石力学与工程学报 Vol.24 No.23 2005 年 12 月 Chinese Journal of Rock Mechanics and Engineering Dec. ，2005 高速列车振动荷载下大断面隧道结构动力响应分析 李 亮，张丙强，杨小礼 ( 中南大学 土木建筑学院，湖南 长沙 410075) 摘要：随着高速铁路的快速发展，高速列车荷载对大断面隧道结构的影响受到关注。采用激振函数模拟高速列车 竖向振动荷载，运用弹塑性有限元方法对大断面隧道结构在列车振动荷载作用下的动响应进行了深入的分析。研 究了不同断面形式、车速和阻尼比系数对振动响应的影响，并将结果与小断面隧道进行比较。 关键词：隧道工程；高速列车；大断面隧道；动力响应；有限元法 中图分类号：U 45 文献标识码：A 文章编号：1000 –6915(2005)23 –4259 –07 ANALYSIS OF DYNAMIC RESPONSE OF LARGE CROSS-SECTION TUNNEL UNDER VIBRATING LOAD INDUCED BY HIGH SPEED TRAIN LI Liang ，ZHANG Bing-qiang ，YANG Xiao-li (School of Civil Engineering and Architecture，Central South University，Changsha 410075 ，China) Abstract ：With the development of high speed railway ，more and more attentions have been paid to the effect of vibrating load induced by high speed train on large cross-section tunnel. Based on the numerical simulation of vertical vibrating load induced by high speed train with excitation function ，dynamic response of large cross-section tunnel under the vibrating load has been analyzed by elastoplastic finite element method；and the effects of different section forms，train speed and damping ratios on the dynamic response are also studied. Comparisons of dynamic responses between large cross-section tunnel and general one are performed. Key words ：tunneling engineering ；high speed train ；large cross-section tunnel ；dynamic response ；finite element method 了动响应分析。在城市繁华地区或一些特殊地段， 1 引 言 由于受建筑物的限制和地下空间综合开发、利用的 需要，出现了交叠隧道。文[3]采用 ANSYS 软件对 列车振动荷载对隧道结构的影响是隧道工程中 南浦