A SIMPLIFIED METHOD FOR COLLAPSE-RESISTANT PERFORMANCE EVALUATION OF RC FRAME STRUCTURES

Quantitative evaluation of collapse-resistant performance of structures has attracted widespread attention in the past few years, urging a set of evaluation indexes with practicality and feasibility to be proposed. In this study, based on the requirement for ductility design in national codes for seismic design of buildings in China, the influence of the ratio of column-to-beam moment strength on the collapse-resistant performance of structure was considered. The effect of the ratio of column plastic shear demand-to-shear capacity was also taken into account. In addition, the correlation of the impact caused by the above two structural parameters on the collapse-resistant performance of structures was analyzed. The results indicate that the ratio of column-to-beam moment strength has a significant impact on the collapse-resistant performance of the structure, and so does the ratio of column plastic shear demand-to-shear capacity. The above two structural parameters also exhibit a strong correlation with collapse performance evaluation. At the same time, by adjusting and combining the above two structural parameters, the collapse-resistant performance of structures was investigated, and a simplified evaluation index of the collapse-resistant performance was established, offering a reference to the quantitative evaluation of collapse-resistant performance of structures.