Abstract
This paper presents an investigation on the rotational behaviors of fork-column Dou-Gong. Five scaled specimens in different construction forms were manufactured and tested by low reversed cyclic loading under three different vertical loads. The failure modes, envelope curve, strength degradation, deformability ratio, stiffness degeneration, and energy dissipation were assessed and compared. The results indicated that the increment of the rotational stiffness gradually decreases with increased vertical load. The relationship between rotational stiffness and vertical load can be simplicity expressed by a logarithmic function. The length, construction form, and number of linking beams are the main parameters affecting the rotational behaviors of single Dou-Gong. Reducing the length or enhancing the combined effect of the linking beams can effectively improve the bearing capacity and deformation capacity of the Dou-Gong, as well as energy dissipation capacity. The rotational behaviors of single Dou-Gong with one linking beam are worse than those of Dou-Gong linked by two beams. In addition, the double Dou-Gong exhibits better symmetry and plumper area than the single Dou-Gong, thus resulting in 109%, 78%, and 163% increment in bearing capacity, rotational stiffness, and energy dissipation, respectively. The moment-rotation curve of fork-column Dou-Gong is nearly trilinear and based on the appropriate mechanical parameters from the test results, the nonlinear hysteresis characteristics of the fork-column Dou-Gong can be simulated by an improved double-target model.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the funding support received from the National Key Research and Development Program (Grant No. 2017YFC0703507) and the National Natural Science Foundation of China (Grant No. 51878550). This research was also supported by projects of the Natural Science Basic Research Program (Grant No. 2018JZ5002) and Education Department of Shaanxi Provincial Government of China (Grant No. 18JS066).
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Published In
Journal of Performance of Constructed Facilities
Volume 34 • Issue 3 • June 2020
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©2020 American Society of Civil Engineers.
History
Received: Jun 5, 2019
Accepted: Nov 6, 2019
Published online: Mar 23, 2020
Published in print: Jun 1, 2020
Discussion open until: Aug 23, 2020
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