Staggered-Supported Steel Anchor Box System for Cable-Stayed Bridges
Publication: Journal of Bridge Engineering
Volume 27, Issue 7
Abstract
This paper presents a novel anchorage structure for stay cables to reduce the load on the concrete pylon. Called the staggered-supported steel anchor box (SS-SAB), this anchorage structure provides self-balancing of the horizontal component of the cable tension force during cable tensioning; the vertical load is transferred to the concrete pylon through a staggered support. The SS-SAB can tolerate the forces within the spatial cable plane and reduce the cracking risks of the concrete pylon. To investigate the behavior of the SS-SAB, a half-scale specimen was designed and tested. Data on the deformation, crack patterns, local strains, and slippages were obtained that demonstrate that the SS-SAB can delay crack occurrences in the concrete pylon. In a supplementary analysis, a finite-element analysis performed using the ABAQUS software suite delivered good accuracy. From the test and numerical analysis, the influence of the cable angle on load sharing within the concrete pylon was investigated. The effective scope of applications of the SS-SAB is provided.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study was completed under the support of the National Key Research and Development Program of China (Grant No. 2021YFB1600301) National Natural Science Foundation of China (Grant No. 52078436) and the Sichuan Science and Technology Program (Grants Nos. 2021JDTD0012 and 2022JDRC0012), and the Opening Funding Project of the Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of the China Earthquake Administration.
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Published In
Journal of Bridge Engineering
Volume 27 • Issue 7 • July 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 27, 2021
Accepted: Mar 15, 2022
Published online: May 11, 2022
Published in print: Jul 1, 2022
Discussion open until: Oct 11, 2022
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Cited by
- Huanwei Liang, Ke Tan, Kailai Deng, Yongming Zhang, Canhui Zhao, Tengyu Yang, Crack Resistance of Steel–Concrete Hybrid Joint between Concrete Girder and Steel–Concrete Composite Girder in Long-Span Cable-Stayed Bridge under Hogging Moment, Journal of Bridge Engineering, 10.1061/JBENF2.BEENG-5895, 28, 2, (2023).
- Haijun Xu, Yuqing Liu, Chi Lu, Analysis on the stress mechanism of the exposed steel anchor box composite cable–pylon anchorage structure, Engineering Structures, 10.1016/j.engstruct.2023.115816, 281, (115816), (2023).