Abstract
To solve the issues of slippage and dislodging caused by insufficient grout compactness in railway bridge spherical steel bearings, a novel kind of anti-separation spherical steel bearing is presented. Firstly, a comparative test model was meticulously designed and constructed for the bearing-stone assembly, encompassing both the traditional spherical steel bearing and the innovative anti-separation spherical steel bearing. Next, mechanical performance testing and finite element simulation analysis were completed. Finally, an empirical equation for the vertical load-strain fitting of the bearing was established. The results demonstrate that, under the maximum vertical static load, the convex spherical crown anti-separation design of the new anti-dislodging bearing is not sensitive to the bearing performance of the bearing-bedding stone combination. All indexes also meet the specifications. Under the action of cyclic load, the error of each parameter between finite element analysis and test results is less than 7%, which shows that the new anti- separation spherical bearing has higher bearing capacity and better fatigue resistance; the fitted value of the established bearing vertical load-strain calculation formula is in agreement with the test value by more than 0.95, which can predict whether the new anti-separation bearing fails.
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Acknowledgments
This project was supported by the General Program of China Postdoctoral Science Foundation (2023MD734111), Sponsored by Natural Science Foundation of Chongqing, China (CSTB2023NSCQ-MSX0853, CSTB2023NSCQ-MSX0433), Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJZD-K202301205), Wanzhou District Science and Technology Innovation Project (20210306, Study on bearing mechanism and buried depth optimization of corrugated guardrail column of low grade highway in mountainous area), Chongqing Three Gorges Reservoir Bank Slope and Engineering Structure Disaster Prevention and Control Center Civil and Hydraulic Master’s Degree Open Fund (SXAPGC23ZDI09), Cooperation projects between universities of Chongqing and institutes affiliated to the Chinese Academy of Sciences (HZ2021012).
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Yan, L., Gou, XY., Zhang, X. et al. Experimental and Numerical Investigations on the Spherical Steel Bearing Capacity of New Anti-Separation Design. KSCE J Civ Eng 28, 889–903 (2024). https://doi.org/10.1007/s12205-023-1172-z
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DOI: https://doi.org/10.1007/s12205-023-1172-z