摘要
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,指出共用结点分离式钢筋混凝土模型能很好地反映钢筋和混凝土材料的力学性能差异。
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 re- sults 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.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2011年第6期647-652,共6页
Explosion and Shock Waves
基金
甘肃省科技计划基金项目:科技支撑计划项目(1011GKCA019)
甘肃省建设科技攻关项目(JK2010-43)
作者简介
言志信（1961-），男，博士，教授。
Corresponding author： LIU Pei-lin, lp1_2005@163.com
