Flexure-Shear Capacity of Perforated Steel Beams Reinforced with Novel Ring Plates
Publication: Journal of Structural Engineering
Volume 149, Issue 9
Abstract
A web opening at the end zone of an I-section steel beam decreases the load-carrying capacity of the steel member. In the present study, a reinforcement method for circular web opening was investigated, applying novel half-ring plates for better economy. To validate the structural performance of the proposed reinforcement, cyclic loading tests were performed on cantilever beams having a web opening adjacent to the plastic hinge zone. The test parameters were shear span-to-depth ratio (i.e., or 2.9), opening diameter-to-beam depth ratio (i.e., or 0.67), and ring-to-opening diameter ratio (i.e., , 1.5, or 1.7). The test results showed that the ring plates successfully strengthened the web opening, developing a plastic hinge at the beam end. Further, irrespective of the design parameters and failure modes, the load-carrying capacity of the reinforced specimens was maintained up to large inelastic deformation. This result indicates that the plate-reinforcing method is effective for increasing both strength and deformation capacity of the perforated beams. To evaluate the flexure-shear capacity of the reinforced opening, an existing model for circular web opening without reinforcement was modified. The predicted flexure-shear interactions agreed well with the test strengths. On the basis of the test results, design considerations for the proposed reinforcement method are recommended.
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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 research described in this paper was financially supported by POSCO, a National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2021R1A4A3030117), and the Korea Agency for Infrastructure Technology Advancement (KAIA) funded by the Ministry of Land, Infrastructure, and Transport (Grant 22RMPP-C163162-02). The authors are grateful to the authorities for their support. The valuable comments of President Toshihiko Iijima from IIJIMA Structural Design Office, and Prof. Atsushi Sato from the Nagoya Institute of Technology, are also appreciated.
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Published In
Journal of Structural Engineering
Volume 149 • Issue 9 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 28, 2022
Accepted: Apr 4, 2023
Published online: Jun 21, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 21, 2023
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