RC框架抗连续性倒塌现浇板作用

The Effect of Cast-in-place Slab on the Anti-progressive Collapse of RC Frame Structure

我国RC框架结构抗连续性倒塌研究和试验通常不考虑现浇板作用。针对该问题,建立考虑填现浇板内钢筋的RC框架结构模型,运用拆除构件法,对剩余结构进行非线性动力分析,对计算结果进行对比,研究了板内钢筋和板厚度对结构抗连续性倒塌能力的影响,得到了在现浇板厚度小于180mm时,现浇板内钢筋对结构抗连续性倒塌能力有较大提高的结论。

The research and experiment of anti-progressive collapse of RC frame structures usually take no account of the effect of cast-in-place slab in China. In this paper, the RC frame structure model considering reinforcing steel in the cast-in-place slab is established, using alternate path method, and nonlinear dynamic analysis is carried out on the remaining structure. Comparing the calculated results, the paper researches the influence of reinforcing steel and the slab thickness on anti-progressive collapse capacity of structure. The results show that： when the thickness of cast-in-place slab is less than 180ram, the ability of anti-progressive collapse of reinforcing steel has been in- creased greatly.