框架剪力墙结构的定向爆破倒塌过程

利用ANSYS/LS-DYNA有限元软件,分别采用整体式模型和共用节点分离式模型对某高层框架剪力墙结构的定向爆破拆除进行数值模拟.通过与实际工程的对比发现,分离式模型模拟的效果更贴近实际,模拟结果更准确；此外,待拆除结构的爆破切口适当上移,可以减少结构的倒塌范围；最后,分析了钢筋和混凝土单元的应力时程曲线,指出共用结点...

Directional blasting collapse process of frame-shear wall structure

With the help of ANSYS/LS-DYNA finite element software,the directional blasting collapse process of a certain high frame-shear wall structure was numerically simulated by using the integral model and common node separate model.And the numerically simulated results were compared with the actual project.Comparisons show that the simulated results by using the common node separate model are in better agreement with the actual project.In addition,the numerically simulated results display that the collapse scope of the structure can be reduced by properly ascending the blasting cut of the structure.Finally,the stress-time curves of the steel and concrete elements indicate that the common node separate reinforced concrete model can correctly reflect the mechanical property differences between steel and concrete.