Abstract

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Title:: Present Research Status and Countermeasure Analysis of Earthquake Collapse Damage of RC Frame Structures

Author(s):: LIU Bo-quan; FU Guo; School of Civil Engineering, Chang’an University

Keywords:: RC frame structure; earthquake; collapse damage; uncertainty; systematiceness; substructure; failure criterion; time history analysis

Abstract:: The present research status of structural collapse damage under rare earthquake was summarized, and the systematicness and uncertainty of structural collapse damage were emphatically analyzed. Meanwhile, the contrastive researches on the different failure criteria and analysis methods were made, and the precise definition of the critical state on structural collapse damage was given. The research results show that the existing failure criteria cannot be used to define the collapse of reinforced concrete (RC) structure precisely. Time history analysis method is more accurate and suitable for collapse research owing to the introduction of a small amount of ground motion randomness. The recommended interval of collapse damage can better reflect the characteristics of collapse damage. The concentration of plastic deformation is the principal factor affecting the structural frame collapse, the overall structure performance degradation caused by the development of plastic hinge in the column ends should be noted. The relevant research results can provide a theoretical basis for quantitative research on the collapse damage of building structure.