楼板对RC框架结构抗连续倒塌性能的影响

楼板作为框架结构的重要组成构件,在结构抗连续倒塌中有重要作用。采用有限元ABAQUS非线性拟静力分析法,模拟两层2×1跨框架结构长边中柱失效以后结构连续倒塌的反应,对比分析考虑与不考虑楼板作用时,RC框架结构连续倒塌的情形,研究楼板对RC框架结构连续倒塌的影响。结果表明:楼板可以显著改善结构的刚度,提高结构的整体性,并延缓梁的铰链出现,提高结构的抗连续倒塌性能。

Effect of floor slab on the progressive collapse resistance of RC frame structures

Floor slab, as main components of structure, has a great influence for progressive collapse. Therefore, in the research of progressive collapse, it is necessary to consider the role of the floor. we use the finite element program of ABAQUS, and simulate the failure of center pillar along long side about the frame structure with two layers. Contrast progressive collapse cases of RC frame structure for considering and not considering floor effect, summed up the floor impact on continuous collapse of RC frame structure. The results show that the floor can greatly improve the resistance and stiffness of the structure, increase structural integrity, and postpone the beam hinge appearing to improve the performance of the structure resisting progressive collapse.