板厚度和梁柱线刚度比对结构抗连续倒塌的影响研究

摘要

通过拆除构件的设计方法,运用 ANSYS/LS-DYNA 有限元计算软件建立六层三跨的钢筋混凝土框架结构模型,分析板的厚度和梁柱线刚度比对钢筋混凝土结构抗连续倒塌性能的影响.结果表明:若增加楼板的厚度或减小梁柱的线刚度比,框架结构的延性提高,稳定性增加,钢筋混凝土框架结构可能产生的连续倒塌的时间延缓,有利于逃生.%It analyzed the effects of plate thickness and beam-column′s linear stiffness ratio on capacity of reinforced concrete structure against progressive collapse in this paper by design method of dismantling components and establishment of six layers of three-span reinforced concrete frame based on ANSYS/LS-DYNA FEM calculation software.The results indicated that the ductility and stability of frame structure will be improved if the thickness of floor-slab increased or beam-column′s linear stiffness ratio decreased,in which case it takes more time in reinforced concrete frame structure′s continuous collapse that will help people to escape.