列车荷载作用下机械法联络通道–隧道结构响应

Dynamic response of different connection forms of mechanical connection tunnels under train loads

机械法联络通道作为一种新型施工工艺,接头处的连接形式采用钢板焊接而成,焊接工艺在动力荷载作用下容易产生疲劳损伤破坏。针对接头处的问题,通过有限元模拟研究了列车荷载对于不同连接形式下主隧道与联络通道上的加速度响应及位移响应情况。研究结果表明:对于位移响应半刚性连接形式下接头能吸收一部分位移传递,有利于隧道整体结构的安全,刚性接头则整体性较强,位移不会出现突然骤减的情况;半刚性接头能削弱加速度的传递,而刚性接头整体性强,对加速传递效率高。

As a new type of construction process,the mechanical connection channel is welded by steel plate,and the welding process is prone to fatigue damage under dynamic loads.According to the problem of the joint,the acceleration response,displacement response and communication channel under different connection modes are studied by using the finite element simulation.For the displacement response semi-rigid connection,the joint can absorb part of the displacement transmission,which is beneficial to the safety of the overall structure of the tunnel.The rigid joint is more integral and the displacement does not suddenly drop.The semi-rigid joint can weaken the transmission of acceleration,while the rigidity of the rigid joint is strong,and the acceleration transmission efficiency is high.