8层受损砖混结构楼爆破拆除的数值模拟

Numerical Simulation of Explosive Demolition of 8-storey Damaged Brick and Concrete Structure Building

受损楼房在爆破拆除前由于其结构稳定性改变,对爆破拆除设计有重要影响。因此通过数值模拟手段进行倒塌过程仿真,对于方案的实施具有特别的指导意义。针对一栋8层受损砖混结构楼房的爆破拆除,运用Ansys/Ls-Dyna有限元分析软件,采用整体式模型,对该楼房倒塌过程进行了数值模拟。通过分析爆破倒塌过程,预测了爆破效果,为安全防护提供了有效建议;通过研究楼房顶部质点运动,分析了爆破切口预留支撑体强度对爆破效果的影响及地面受冲击情况。

The damaged buildings have important influence on the design of blasting demolition, due to the change of the structure stability before the demolition, then it is of special significance for the implementation of the scheme through the numerical simulation. In allusion to blasting demolition of a 8 layer damaged brick concrete struc- ture building, the Ansys/Ls-Dyna finite element analysis software and the smeared model were used to simulate the collapse process of the building. By analyzing the collapse process of blasting, the blasting effect was predicted, which provided effective suggestions for safety protection. The effect of reserved support body strength beyond blasting gap and the impact on the ground were analyzed by means of studying the particle at the top of the building.