Truss-Arch Model for Shear Strength of Shear-Critical Reinforced Concrete Columns
Publication: Journal of Structural Engineering
Volume 139, Issue 4
Abstract
Experimental observations on 11 RC columns tested at Nanyang Technological University and existing experimental data of 79 shear-critical RC columns are presented. Significant arch action is found in columns with a small shear span-to-depth ratio and high axial-load ratio under shear force. Using the sectional method for shear strength of these types of columns, which does not consider arch action, would give a more conservative prediction. On the basis of the truss-arch model, an expression to predict the shear strength of shear-critical RC columns is presented, which considers both the contributions of concrete and transverse reinforcement to shear strength in the truss model, as well as the contribution of arch action through compatibility of deformation. The proposed model is compared with other shear strength models using the available column test data consisting of 90 shear-critical RC columns, and the results show that the proposed model can improve the accuracy of shear strength predictions for shear-critical RC columns.
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Acknowledgments
The experiments by Tran (2010) were carried out in the Protective Engineering Laboratory at the Nanyang Technological University, Singapore.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 139 • Issue 4 • April 2013
Pages: 548 - 560
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 8, 2011
Accepted: Jul 20, 2012
Published online: Aug 11, 2012
Published in print: Apr 1, 2013
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