RESEARCH ARTICLE


Analysis on Dynamic Response of Reinforced Concrete Frame for Resisting Progressive Collapse



Tiecheng Wang1, 2, Lei Zhang1, Hailong Zhao1, 2, *, Qingwei Chen1
1 School of Civil Engineering, Tianjin University, Tianjin, China
2 Key Laboratory of Coast Civil Structures, Tianjin University, Ministry of Education, Tianjin, China


© Wang et al ; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at School of Civil Engineering, Tianjin University, 300072, P.R. China; Tel: (+86) 13821290260; E-mail: hgdtdkimi@163.com


Abstract

In order to investigate the dynamic response of reinforced concrete spatial frames caused by initial damages, a six-story frame model is analyzed by employing the nonlinear dynamic methodology in accordance with the alternate path method issued by General Services Administration. In this paper, the fiber model and force-based beam-column element are utilized in OpenSees. Four various scenarios are separately analyzed with incremental dynamic analysis. It is shown that the model does not collapse and the internal force redistribution mainly appears in the components adjacent to the failure column. The model has the worst capacity to resist progressive collapse in the inner column demolition scenario. It is observed that the plastic hinges mainly concentrate on the beam ends of the failure bay at the beginning of the demolition of columns. Several plastic hinges emerge at the top-floor beam ends of some other bays in latter period. The number of plastic hinges in columns is much less than that in beams, which corresponds to the design principle ‘strong column and weak beam’.

Keywords: Alternate path analysis, column failure, dynamic response, nonlinear analysis, progressive collapse.