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Direct-displacement and force-based seismic assessment of RC frame structures

Direct-displacement and force-based seismic assessment of RC frame structures Direct-displacement based design (DDBD) approach is a significant development in structural fields to outdo the deficits of force-based design (FBD) for reinforced concrete (RC) frame buildings. In the current study, the inelastic behaviour of buildings designed by FBD and DDBD are investigated with numerical research. Four and eight-storied RC frame buildings representing low and mid-rise RC buildings are considered. Non-linear static and dynamic analyses are executed to evaluate the effectiveness of both procedures in designing the selected RC buildings. Life safety level (2% target drift: FEMA-356) is considered as performance criteria. Base shear ratio, capacity curves, formation of plastic hinges, displacement profile and inter-storey drift ratio (ISDR) are selected as response parameters. The analysis results show that the mean drift ratios of low and mid-rise RC buildings designed using FBD exceed the target drift by 21%. This behaviour is contrary in RC buildings designed by DDBD with satisfying mean drift ratios of 51% to target drift. The analysis also highlights that the DDBD approach is more rational and economical than the FBD approach. Overall, this study demonstrates that buildings designed by the DDBD approach satisfy the chosen safety level criteria. In contrast, buildings designed by FBD approach result in poor seismic performance and are not able to address the target criteria level. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Direct-displacement and force-based seismic assessment of RC frame structures

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References (48)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2021
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-021-00160-z
Publisher site
See Article on Publisher Site

Abstract

Direct-displacement based design (DDBD) approach is a significant development in structural fields to outdo the deficits of force-based design (FBD) for reinforced concrete (RC) frame buildings. In the current study, the inelastic behaviour of buildings designed by FBD and DDBD are investigated with numerical research. Four and eight-storied RC frame buildings representing low and mid-rise RC buildings are considered. Non-linear static and dynamic analyses are executed to evaluate the effectiveness of both procedures in designing the selected RC buildings. Life safety level (2% target drift: FEMA-356) is considered as performance criteria. Base shear ratio, capacity curves, formation of plastic hinges, displacement profile and inter-storey drift ratio (ISDR) are selected as response parameters. The analysis results show that the mean drift ratios of low and mid-rise RC buildings designed using FBD exceed the target drift by 21%. This behaviour is contrary in RC buildings designed by DDBD with satisfying mean drift ratios of 51% to target drift. The analysis also highlights that the DDBD approach is more rational and economical than the FBD approach. Overall, this study demonstrates that buildings designed by the DDBD approach satisfy the chosen safety level criteria. In contrast, buildings designed by FBD approach result in poor seismic performance and are not able to address the target criteria level.

Journal

Journal of Building Pathology and RehabilitationSpringer Journals

Published: Dec 1, 2022

Keywords: Displacement-based design; Pushover analysis; Force-based design; Time history analysis; Reinforced-concrete frames building

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