爆炸作用下矩形隧道衬砌结构动力响应研究

Dynamic Response of Rectangular Tunnel Lining Structure under Explosion

在地下空间结构中,通道工程的安全问题至关重要。对于通道工程的研究,一些文献就矩形截面通道衬砌结构在顶爆情况下的安全进行了简化分析和讨论。然而考虑到实际情况,炸药在土中有一定侵入深度,且板墙连接处腋角对结构在爆炸作用下的响应不容忽视。为了解决这些问题,运用ANSYS/LS-DYNA动力有限元分析程序,利用流固耦合算法,对地下矩形截面通道在土中爆炸荷载作用下的响应进行数值模拟,比较顶部加腋后结果的变化,为地下通道工程的邻近爆破施工和安全防护设计提供参考。

In the underground space structure,the safety of the tunnel project is very important.For the study of channel engineering,some literatures have simplified the analysis and discussion on the safety of rectangular channel lining structure in the case of top explosion.However,considering the actual situation,the explosive has a certain depth of penetration in the soil,and the response of the haunch of the plate wall junction to the structure under the action of explosion cannot be ignored.In order to solve these problems,ANSYS/LS-DYNA dynamic finite element analysis program is applied,and fluid-solid coupling algorithm is used to carry out numerical simulation on the response of the underground rectangular section channel under the action of explosive load in soil.The change of the results after the top addition of haunch is compared,which provides reference for the adjacent blasting construction and safety protection design of the underground passage engineering.