框架结构楼房爆破拆除倒塌过程模拟

COLLAPSE SIMULATION OF BUILDING IN FRAME STRUCTURE IN CONTROLLED BLASTING DEMOLITION

采用有限元方法结合动力有限元分析程序ANSYS/LS-DYNA建立了钢筋混凝土结构数值模型,以模拟框架建筑物爆破拆除的倒塌过程。将钢筋混凝土看作单质均匀材料并采用约束混凝土材料本构关系,以塑性应变控制材料失效,该方法可以计算建筑物爆破切口的形成及倒塌的全部过程。

In order to simulate the collapse of building in framed construction in progress of demolition by controlled blasting,RC structure numerical model was built with FEM combined with ANSYS/LS-DYNA code in this article. In the simulation, the reinforced concrete was treated as single homogeneous material, the constitutive relation of confined concrete was adopted and the plasticity strain was used to control material failure. And as a result,the formation of blasting cut and the whole collapsing course could be computed.