爆破动荷载作用下的地下结构内力计算方法探讨

地下结构内力计算是地下结构工程设计与施工验算的重要内容,而地下结构内力计算方法是地下结构内力计算的理论基础,所以必须加强地下结构内力计算方法的研究。这里采用结构动力学原理和弹性力学厚板理论对爆破动荷载作用下的地下结构内力计算方法进行了研究,推导了爆破荷载作用下的地下结构围岩和支护的内力M和Q计算公式,可用于分析地下结构相互作用原理、围岩压力分布和支护应力状态以及地下结构设计与施工强度验算。

Calculating Method of Subsurface Structures' Inner Force caused by Explosion Dynamic Load

Internal force calculation of subsurface structure is the important content of the engineering's design and construction,and the calculating method of the underground structures'inner force is the theoretical basis.In this research,the calculating method of the substructures' inner force caused by explosion load is studyed based on the structural dynamics and the theory of thick plate of the elastic mechanics.The formula of the inner force caused by the explosion load in the substructures'surrounding rock and supporting system are deduced.It can be used to ana-lyze the interaction principle of underground structures',the pressure distribution of of the surrounding rock and the stress condition of supporting.Moreover,it can provide suggestion for design and constructions'strength check of the underground structure.