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基于动力有限元法模拟不同碰撞条件下隧道衬砌与大型车辆的动态相互作用,研究车辆与隧道结构在撞击作用下的动态响应。结果表明:在碰撞角度相同的情况下,隧道衬砌拉伸损伤值随车速的增大而增大;在失控车速相同的条件下,拉伸损伤值随碰撞角度的增大而增大;碰撞速度与角度越大,则车内人员受到的加速度越大,损伤越严重。对我国京沪高速公路上的蟠龙隧道碰撞事故(2009年)进行了数值模拟,对比分析发现数值模拟结果与蟠龙隧道碰撞事故后衬砌的表观信息及超声波探测结果有很好的一致性,碰撞后损伤区域的混凝土渗透系数明显增大,表明碰撞后衬砌发生漏水的几率明显增大。
The dynamic interaction between tunnel lining and large vehicles under different collision conditions is simulated based on dynamic finite element method and the dynamic response of vehicle and tunnel structure under impact is studied. The results show that under the same collision angle, the damage value of tunnel lining increases with the increase of vehicle speed. Under the same condition of uncontrolled speed, the tensile damage value increases with the increase of collision angle. The collision speed And the greater the angle, the greater the acceleration of the car staff, the more serious damage. The numerical simulation of the Beaulieu Tunnel collision on the Beijing-Shanghai Expressway (2009) was carried out. The results of the numerical simulation were in good agreement with the apparent information of the lining and ultrasonic detection results after the Beaulieu collision After the collision, the damage area of concrete significantly increased the permeability coefficient, indicating that the risk of water leakage occurred after the collision liner increased significantly.