Simplified Dynamic Assessment for Reinforced-Concrete Structures Subject to Column Removal Scenarios
Publication: Journal of Structural Engineering
Volume 146, Issue 12
Abstract
A simple yet effective method for dynamic assessment of building structures subject to a sudden column removal is presented. An equivalent single-degree-of-freedom (SDOF) dynamic model to predict the realistic dynamic response of the structure after column removal is proposed. This model considers nonzero initial conditions that are likely to occur under blast loading and structural damping, which can significantly affect the dynamic performance under large deformations. Based on the proposed method, dynamic response of a structure subject to a specific dynamic loading released from column removal is analytically solved. Four sets of physical tests of structures subject to column removal, including quasi-static tests and the corresponding multiple free-fall dynamic tests, are employed to verify the proposed assessment method. In addition, the classical pseudostatic assessment is conducted for the test series and compared with the present method. Results obtained from the verification study demonstrate the accuracy and effectiveness of the proposed simplified dynamic assessment. In addition, the proposed equivalent SDOF method is simple and can be easily implemented with a spreadsheet by practicing engineers. This advantage allows the proposed method to be employed as a routine design procedure for predicting the dynamic performance of structures subject to column removal.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request.
Acknowledgments
This study was financially supported by the research grant GPC: MHA 191/9/1/345 provided by Ministry of Home Affairs, Singapore. The authors appreciate the financial support by the organization. The essential experimental data shared by Dr. Namyo Slim Lim and Dr. Anh Tuan Pham is greatly acknowledged.
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Published In
Journal of Structural Engineering
Volume 146 • Issue 12 • December 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Dec 4, 2019
Accepted: Jun 16, 2020
Published online: Sep 25, 2020
Published in print: Dec 1, 2020
Discussion open until: Feb 25, 2021
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