Progressive Collapse-Resisting Mechanisms and Robustness of RC Frame–Shear Wall Structures
Publication: Journal of Performance of Constructed Facilities
Volume 31, Issue 5
Abstract
In previous studies, reinforced concrete (RC) frame–shear wall structures subjected to partial wall removals have been investigated using the nonlinear dynamic alternate path method (APM). However, in the case of an arrested collapse, the APM is not able to obtain the residual capacity. Moreover, less attention has been paid to resisting mechanisms of partially damaged shear walls due to extreme loading on different stories. In the present study a perimeter dual system from a prototype RC frame–shear wall building is investigated using pushdown analysis. The structure is modeled based on a reliable framework established by validating modeling approaches. Load redistribution mechanisms of partially damaged shear walls are indicated and the collapse resistance is quantitatively evaluated following wall (column) removals from different stories. Based on the results, shear walls show considerably high resistance to progressive collapse, which can be implemented in collapse-resistant design. Detailed descriptions of modeling approaches and validations in this study provide guidelines for simulation of different RC structural elements under large deformations.
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Acknowledgments
The authors are grateful to the late Professor Reza Abbasnia. His help and valuable suggestions which assisted this research are acknowledged. The helpful comments of Dr. Foad Mohajeri Nav on an early draft of this paper are also appreciated.
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©2017 American Society of Civil Engineers.
History
Received: Jun 27, 2016
Accepted: Nov 10, 2016
Published online: Mar 24, 2017
Discussion open until: Aug 24, 2017
Published in print: Oct 1, 2017
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