Progressive collapse analysis of experimental building skeleton based on stress-strain state of columns and joints

Abstract

Purpose: The aim of this work is to compare three methods of the progressive collapse analysis of the experimental building skeleton based on the stress-strain state of the columns and joints. Design technique: The stress-strain state modeling of the columns is performed for the building with the removed intermediate column in the basement. The building includes a basement and represents a reinforced concrete composite frame without collar beams. The MicroFe software is used for three modeling methods, which include quasi-static, dynamic, and kinematic method of limit equilibrium. The MicroFe analysis is combined with the development of the three-dimensional model on a rigid foundation. Findings: The progressive collapse is proven to be impossible for the building skeleton after the removal of the intermediate column in its basement. Originality/value: Based on the three analytical methods, the limit load reproducibility is 15 %. The dynamic analysis gives higher values of the limit load as compared to the quasi-static and kinematic methods. Practical implications: The proposed procedure of three methods for the progressive collapse analysis can be used for the seismic vulnerability analysis.