中南大学学报（自然科学版）2011，Vol.42Issue(4)：1085-1091,7.
桥隧相连结构静动力特性影响因素分析
Influenced factors of static-dynamic character about tunnel-bridge structure
摘要
Abstract
By using the 3-D static-dynamic FEM method, the influencing factors of the static-dynamic character on the tunnel-bridge structure were studied.In calculation process, the interaction of rock, tunnel liner and abutment were considered, the simplified calculating model was put forward according the character of dynamic FEM and its reliability was testified.The effect of train speed, the ratio of height-to-span of tunnel and the length of abutment entering into tunnel on the static-dynamic characteristics of tunnel were discussed.The calculation results show that the velocity and the braking load of train and the ratio of height-to-span of tunnel have little influence on the static-dynamic character of the structure, and the variation of tunnel stress and deformation are basically within 10％ except the vertical deformation of tunnel.The length of the abutment entering into the tunnel should be over 4 m, so the single-track tunnel-bridge structure has the best mechanical behavior.关键词
桥隧相连结构/静动力特性/影响因素Key words
tunnel-bridge structure/ static-dynamic character/ influenced factors分类
交通工程引用本文复制引用
施成华,雷明锋,彭立敏,赵丹..桥隧相连结构静动力特性影响因素分析[J].中南大学学报（自然科学版）,2011,42(4):1085-1091,7.基金项目
国家自然科学基金资助项目(50808176,50778178),铁道部重点计划项目(2003G036-6) （50808176,50778178）
