文档介绍：第 42 卷第 4 期
2011 年 4 月
中南大学学报(自然科学版)
Journal of Central South University (Science and Technology)
Apr. 2011
桥隧相连结构静动力特性影响因素分析
施成华,雷明锋,彭立敏,赵丹
(中南大学土木建筑学院,湖南长沙,410075)
摘要:采用三维静动力有限元计算方法,对隧道洞口段桥隧相连复杂结构静动力特性的影响因素进行分析。考虑
围岩、隧道衬砌以及桥台的相互作用,根据动力有限元的特点建立简化计算模型并验证其可靠性,分析列车速度、
高跨比、桥台伸入隧道长度等,对隧道结构的静动力响应的影响。计算结果表明:列车速度、列车制动荷载及隧
道高跨比对隧道结构的静动力受力特性影响较小,除竖向位移外,隧道其余应力及位移的变化在 10%以内;对于
单线桥隧相连结构,桥台伸入隧道长度应达到 4 m 以上,以保证桥隧相连结构处于相对较佳的受力状态。
关键词:桥隧相连结构;静动力特性;影响因素
中图分类号:U451
文献标志码:A
文章编号:1672−7207(2011)04−1085−07
Influenced factors of static­dynamic character about
tunnel­bridge structure
SHI Cheng­hua, LEI Ming­feng, PENG Li­min, ZHAO Dan
(School of Civil Engineering and Architecture, Central South University, Changsha 410075, China)
Abstract: By using the 3­D static­dynamic FEM method, the influencing factors of the static­dynamic character on the
tunnel­bridge 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 height­to­span of tunnel and the length of abutment entering into
tunnel on the static­dynamic characteristics of tunnel were discussed. The calculation results show that the velocity and
the braking load of t