标题：Shock responses of a metro tunnel subjected to explosive loads
作者：Kong, De-Sen ;Meng, Qing-Hui ;Zhang, Wei-Wei ;Zhang, Qiu-Hua
作者机构：[Kong, De-Sen ;Meng, Qing-Hui ;Zhang, Wei-Wei ;Zhang, Qiu-Hua ] College of Civil Engineering and Architecture, Shandong University of Science and Tech 更多
来源：Zhendong yu Chongji/Journal of Vibration and Shock
摘要：With large-scale construction of metro, the anti-explosion protection of metro tunnels becomes an urgent problem. Aiming at the practical engineering geological conditions of running tunnels in Nanjing metro, a calculation model for shock responses of a metro tunnel was established, and comprehensive study on shock response of a metro tunnel under action of 10 kg TNT was conducted with fluid-structure coupling computation. The results indicated that velocity and acceleration variations of the liner are related with overpressure and with increase in the distance from the blasting center, the influence of the explosive shock waves on the liner structure decreases; moreover, at the initial time of the explosion, the liner of the metro is in tensile state, and with time passing, the peak value of the overpressure decreases gradually, then the tensile state of the tunnel liner changes into a compressed one and tends to be stable finally. The results provided a reference for anti-explosion protection of a metro tunnel and making an emergent preplan.