中国铁道科学2013，Vol.34Issue(3)：47-52,6.DOI:10.3969/j.issn.1001-4632.2013.03.08
重载列车作用下隧道结构的动应力分析
Analysis on Dynamic Stress of Tunnel Structure under Heavy Haul Train
摘要
Abstract
Based on the engineering background of Sanjiacun tunnel with composite lining on the ShuoHuang Railway,the acceleration time-history curve of filling layer surface when C64k gondola car passing through tunnel at the speed of 70 km· h-1 was used for exciting load to analyze the dynamic stress of tunnel structure under heavy haul train by ANASYS.The results show that,when the gondola car passing the tunnel,both the transverse and vertical dynamic stress of filling layer is first tension and then compression.The maximum transverse tension,compression and vertical compression dynamic stress is about 20,70 and 50 kPa respectively,which all occur under the 1# and 4# rail near the side wall The maximum vertical tension dynamic stress is about 15 kPa,which occurs under 1#-4# rail near the side wall.The upper surface of invert arch is compression vertically,and the maximum compression dynamic stress is about 15 kPa,which occurs right below the rail; while it is tension transversely,the maximum tension dynamic stress is about 40 kPa,which occurs at railway centre.The vertical and transverse tension and compression dynamic stress at the inner surface of vault and haunch are smaller,which are below 20 kPa.Greater vertical tension and compression dynamic stresses occur at the inner surface of side wall,and the maximum values are 55 and 25 kPa respectively.Both the transverse tension and compression dynamic stress is less than 1 kPa.In a word,the effect by heavy haul train to foundation base structure is the most,the side wall is the second,the haunch and invert arch is the smallest.关键词
隧道/复合式衬砌/动应力/重载列车/大轴重Key words
Tunnel/ Composite lining/ Dynamic stress/ Heavy haul train/ Heavy axle load分类
交通工程引用本文复制引用
尹成斐,付兵先,马伟斌..重载列车作用下隧道结构的动应力分析[J].中国铁道科学,2013,34(3):47-52,6.基金项目
铁道部科技研究开发计划项目(2012G002-2) （2012G002-2）
