框架剪力墙结构的定向爆破倒塌过程

Directionalblastingcollapseprocess offrame-shearwallstructure

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。
- 爆炸力学 /
- 定向爆破拆除 /
- ANSYS/LS-DYNA /
- 框剪结构 /
- 分离式模型
Abstract: WiththehelpofANSYS/LS-DYNAfiniteelementsoftware,thedirectionalblastingcollapseprocessofacertainhighframe- shearwallstructurewasnumericallysimulatedbyusingtheintegralmodelandcommonnodeseparatemodel. Andthenumericallysimulatedresultswerecompared withtheactualproject.Comparisonsshowthatthesimulatedresultsbyusingthecommonnodeseparatemodelareinbetteragreementwiththeactualproject. Inaddition,thenumericallysimulatedresultsdisplaythatthecollapsescopeofthestructurecanbereducedbyproperlyascendingtheblasting cutofthestructure.Finally,thestress-timecurvesofthesteelandconcreteelementsindicatethatthe commonnodeseparatereinforcedconcretemodelcancorrectlyreflectthemechanicalpropertydifferencesbetweensteelandconcrete.
- mechanicsofexplosion /
- directionaldemolition /
- ANSYS/LS-DYNA /
- frame-shearstructure /
- commonnodeseparetemodel