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框架结构抗地震倒塌性能的定量评估近年来受到广泛关注,迫切需要建立一套抗倒塌性能评估指标,而且需同时具备实用性和可行性。该文从我国抗震规范的延性设计要求出发,分别考虑柱、梁抗弯承载力比和柱弯曲屈服对应的剪力与柱受剪承载力比等参数对结构抗倒塌性能的影响,并分析了二者对结构抗倒塌性能影响的相关性。结果表明:柱、梁抗弯承载力比对结构抗倒塌性能影响显著,柱弯曲屈服对应的剪力与柱受剪承载力比对结构抗倒塌性能也有一定的影响,且二者对结构抗倒塌性能的影响存在相关性。通过对这两个结构参数进行不同的调整组合,考察结构的抗倒塌性能,进一步建立了简化的抗倒塌性能评估指标,为框架结构抗倒塌性能的定量评估提供参考。
In recent years, the quantitative evaluation of seismic collapse performance of frame structures has drawn much attention and there is an urgent need to establish a set of evaluation indexes for anti-collapse performance, which should be both practical and feasible. Based on the ductility design requirements of China’s seismic code, this paper considers the influence of column-beam bending moment capacity ratio and column bending yield on the anti-collapse performance of the structure respectively. Correlation of the impact on the structural collapse resistance. The results show that the flexural capacity ratio of column and beam has significant effect on the collapse resistance of the structure, and the shear strength and column shear capacity ratio corresponding to column bending yield also have some influence on the collapse resistance of the structure. The impact is relevant. Through different adjustment and combination of the two structural parameters, the anti-collapse performance of the structure is investigated, and a simplified evaluation index of the anti-collapse performance is further established to provide a reference for the quantitative evaluation of the anti-collapse performance of the frame structure.