摘要
地铁隧道在斜穿活动地裂缝时处于弯、剪、扭的复杂受力状态,针对箱型隧道物理模型试验中表现突出的扭转变形破坏,笔者基于薄壁杆件约束扭转理论,结合箱型隧道斜穿活动地裂缝的实际受力情况,提出箱型隧道衬砌结构在集中扭矩和表面均布摩擦扭矩作用下的扭转角和剪应力解析解。利用ANSYS建立箱型隧道衬砌结构扭转变形有限元模型,并分析截面扭转角和最大剪应力,数值模拟结果和用解析法得到的扭转角及最大剪应力吻合良好。
When crossing active ground fissure diagonally, subway tunnel is in the complex stress state of bend, shear as well as torsion. According to outstanding torsional deformation and failure of physical model test for box tunnel, based on the theory of thin-walled under constrained torsion and combined with box tunnel diagonal crossing active ground fissure of the actual stress situation, the torsion angle and shear stress analytical solution of box tunnel lining structure under concentrated torque and uniform friction torque on surface were proposed. By using ANSYS, box tunnel lining structure and torsion deformation＇s finite element model was established. And the torsion angle cross-section and the maximum shear stress were analyzed. The torsion angle and the maximum shear stress from the result of numerical simulation and analytical were in good anastomosis.
出处
《土木建筑与环境工程》
CSCD
北大核心
2013年第1期1-6,共6页
Journal of Civil,Architectural & Environment Engineering
基金
国家自然科学基金资助项目(40602033)
中央高校基本科研业务费专项资金资助项目(CHD2010JC129)
关键词
地铁
隧道
扭转变形
解析法
subways
tunnels
torsional deformation
analytical method
