Mechanism of Progressive Collapse Resistance of RC Frames Subjected to a Center Column Loss

2019 3rd International Workshop on Renewable Energy and Development

能源学;生态环境科学

Hou, Jian^1 ; Wang, Jian'An^2

Department of Civil Engineering, Xi'An Jiaotong University, Xi'an, Shaanxi

710049, China^1

China Jikan Research Institute of Engineering Investigations and Design Co., Ltd., Xi'an, Shaanxi

710043, China^2

关键词: Catenary actions;    Computational results;    Frame beams;    Progressive collapse;    Scale modeling;    Simplified calculation method;    Tensile membrane action;    Vertical displacements;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/267/5/052066/pdf
DOI  :  10.1088/1755-1315/267/5/052066

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Column loss scenarios are often used to investigate progressive collapse resistance of reinforced concrete (RC) buildings. The present study experimentally and computationally investigated the progressive collapse resistance of RC frames subjected to a center column loss. A one-third scale model of a single-story RC frame, which comprises two spans and two bays, was tested and computed. During the experiment and numerical analysis, the vertical displacement on the top of the removed center column was applied until it failed. This study gives insight into the progressive collapse behaviour as well as the failure mode of the RC frame. It has been shown that the catenary action can be activated in the frame beams, and the tensile membrane action can also be mobilized in the frame slabs at large deformations. Based on the experimental and computational results, the mechanism of progressive collapse resistance of RC frames was discussed. At large deformations, a simplified calculation method of progressive collapse resistance of RC frames was also proposed.