Performance of Arched Steel Haunches Equipped with Rib Element under Cyclic Loading
Publication: Journal of Structural Engineering
Volume 148, Issue 3
Abstract
This paper introduces a novel technique called arched steel haunches with rib element (ASHR) for seismic retrofitting of RC frames. In this approach, the arched haunch is equipped with a steel ring or link, as the rib element (RE). A simplified physical model was proposed to approximate their behavioral curves. To evaluate the model’s accuracy, a series of cyclic load tests on arched steel haunches, with and without RE, were conducted. The experimental responses showed that by increasing the RE stiffness, the maximum damping ratio decreased conversely, while the strength, plastic stiffness, and even dissipated energy increased. Accordingly, the tensile and compressive strength increased up to 1.5 and 1.35 times, respectively. However, the elastic stiffness did not vary compared to the reference specimens; the tensile plastic stiffness increased up to three times and, the ultimate secant stiffness in tension and compression enhanced up to 1.56 and 3.9 times, respectively. Moreover, the total energy dissipation upgraded up to 1.39 times with the fusing of the rib elements. It should be noted that the results of this pilot study will be used in future research on the experimental behavior of the reinforced concrete beam-column joints.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors thank the people who financially and technically helped us to test the specimens. This research was financially supported by the Research Bureau of Semnan University and also technical support from the staff, especially from structural lab technician Mr. Bakhshaee.
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© 2021 American Society of Civil Engineers.
History
Received: Apr 6, 2021
Accepted: Oct 26, 2021
Published online: Dec 28, 2021
Published in print: Mar 1, 2022
Discussion open until: May 28, 2022
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Cited by
- Ebrahim Emami, Ali Kheyroddin, Omid Rezaifar, Eccentricity and slenderness ratio effects of arched steel haunches subjected to cyclic loading; experimental study, Advances in Structural Engineering, 10.1177/13694332211063677, 25, 6, (1339-1356), (2022).