Modeling Hysteretic Behavior of Lateral Load-Resisting Elements in Traditional Chinese Timber Structures
Publication: Journal of Structural Engineering
Volume 146, Issue 5
Abstract
Dou-gong connections and mortise-tenon jointed traditional timber frames are widely used in traditional Chinese timber structures to resist lateral loads. Such elements exhibit strong nonlinearity in unloading routes, especially at drifts beyond the peak load. This paper proposes a multifunctional model for the hysteretic behavior of dou-gong connections and mortise-tenon jointed timber frames. The proposed model is capable of capturing the asymmetric envelopes in opposite loading directions via two sets of ten adjustable parameters and utilizes Bézier curves for the unloading routes and linear pinching routes via nine parameters. The model validity was discussed in comparison with two commonly used models—the SAWS and the Pinching4 models—based on the reversed cyclic test results of typical traditional Chinese dou-gong connections and mortise-tenon jointed timber frames. The use of the Bézier curves and two different unloading patterns in the proposed model was found to be more reasonable than the piecewise linear unloading routes used in the SAWS and Pinching4 models. The proposed model agrees better with the test results in both the load-displacement hysteretic curves and the energy dissipation. The case study on the seismic fragility of traditional Chinese mortise-tenon jointed timber frames confirms the computation stability of the proposed model by the smooth hysteretic curves established based on the seismic accelerations and the resulting displacements.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (Grant No. 51878477), the Scientific and Technology Committee of Shanghai Metropolitan (Grant No. 13231201703), and the China Scholarship Council (No. 201706260111).
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Published In
Journal of Structural Engineering
Volume 146 • Issue 5 • May 2020
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©2020 American Society of Civil Engineers.
History
Received: Mar 1, 2019
Accepted: Oct 15, 2019
Published online: Feb 29, 2020
Published in print: May 1, 2020
Discussion open until: Jul 29, 2020
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