Three-Dimensional Combined Elastic-Plastic and Damage Model for Nonlinear Analysis of Wood
Publication: Journal of Structural Engineering
Volume 144, Issue 8
Abstract
This paper presents a three-dimensional combined elastic-plastic and damage model for nonlinear analysis of wood members and connections. A strain-driven implicit algorithm was developed based on plastic theory and continuum damage mechanics, and it was incorporated in the model. The model considers both ductile and brittle wood failures, as well as irreversible deformation and softening behavior of wood. A mesh independence strategy and viscous regularization technique were employed to improve the computation efficiency. The model was tested and validated based on test data. It was found that the irreversible deformation and the softening behavior of wood under compression can be traced by the model with acceptable accuracy. The modeling results of mortise-and-tenon wood connections implied that the proposed model can reasonably predict the strength softening, stiffness degradation, and pinching effect of such connections under reversed cyclic loading. Comparison with elastic-plastic models also indicated that the proposed model was superior regarding the prediction of the connection moment resistance (less than 14.8% error).
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Acknowledgments
This research was supported financially by the National Natural Science Foundation of China (Grant No. 51478336).
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 144 • Issue 8 • August 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Aug 15, 2017
Accepted: Feb 2, 2018
Published online: May 25, 2018
Published in print: Aug 1, 2018
Discussion open until: Oct 25, 2018
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