Prediction of Lateral Load Displacement Curves for Reinforced Concrete Short Columns Failed in Shear
Publication: Journal of Structural Engineering
Volume 143, Issue 2
Abstract
Short columns in buildings are generally the members with high stiffness and governed by brittle shear failure. Therefore, lateral load displacement curves for short columns have significant influence on the seismic assessment. In this study, a trilinear relationship is proposed to simulate the seismic behavior of short columns failed in shear with the height-to-depth ratio of less than 2. The turning points of the proposed curve are defined as shear cracking, shear strength and collapse point, and straight lines connecting these points. Shear cracking is an apparent turning point in stiffness from shear cracking of concrete to reaching the shear strength of the short column. As cracks propagate, concrete struts are formed in the cracks and the crushing strength of the struts is subsequently reached. The proposed trilinear relationship of short columns is based on these observations from experimental results and can greatly simplify the analytical model. At last, a comparison with experimental results to verify and to check the applicability of the proposed model is reported.
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Acknowledgments
The financial support that was provided by the Ministry of Science and Technology in Taiwan is greatly appreciated (project no.: MOST-104-2811-M-002015).
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Published In
Journal of Structural Engineering
Volume 143 • Issue 2 • February 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Mar 21, 2016
Accepted: Jul 18, 2016
Published online: Aug 31, 2016
Discussion open until: Jan 31, 2017
Published in print: Feb 1, 2017
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