Elastic-to-Plastic Strut-and-Tie Model for Deep Beams
Publication: Journal of Bridge Engineering
Volume 23, Issue 4
Abstract
The strut-and-tie model (STM) has been adopted as a preferred methodology for the design of disturbed regions of structural concrete; however, the service behavior of structural concrete, especially with regard to cracking, cannot be predicted well by a STM, which is based on the lower-bound theorem of plasticity. To address this issue, this paper presents the development of an advanced elastic-to-plastic STM (EPSTM) to capture the full elastic and inelastic responses of a deep beam. The principle of stationary complementary energy was introduced into the STM to satisfy the compatibility and generate the adaptive EPSTM at each load step. The proposed EPSTM provides a consistent analysis of the behavior of a deep beam, including the average strain of struts and ties, load-deformation response, and the maximum crack width. Through comparisons of model outputs with test results, the proposed model was verified to be sufficiently accurate.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (Grants 51278120 and 51408116) and Jiangsu Province (Grant BK20140630).
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Published In
Journal of Bridge Engineering
Volume 23 • Issue 4 • April 2018
Copyright
© 2018 American Society of Civil Engineers.
History
Received: Oct 27, 2016
Accepted: Sep 21, 2017
Published online: Jan 19, 2018
Published in print: Apr 1, 2018
Discussion open until: Jun 19, 2018
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