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Structural Engineering and Mechanics Volume 85, Number 3, February10 2023 , pages 407-417 DOI: https://doi.org/10.12989/sem.2023.85.3.407 |
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Seismic performance of precast assembled bridge piers with hybrid connection |
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Shuang Zou, Heisha Wenliuhan, Yanhui Liu, Zhipeng Zhai and Chongbin Zhang
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| Abstract | ||
| Precast assembled bridge piers with hybrid connection (PASP) use both tendons and socket connections. To study the seismic performance of PASP, a full-scale in-situ test was performed based on an actual bridge project. The elastic-plastic fiber model of PASP was established using finite element software, and numerical analyses were performed to study the influence of prestress degree and socket depth on the PASP seismic performance. The results show that the typical failure mode of PASP under horizontal load is bending failure dominated by concrete cracking at the joint between the column and cushion cap. The cracking of the pier concrete and opening of joints depend on the prestress degree and socket depth. The prestressing tendons and socket connection can provide enough ductility, strength, restoration capability, and bending strength under small horizontal displacements. Although the bearing capacity and post yield stiffness of the pier can be improved to some extent by increasing the prestressing force, ductility is reduced, and residual deformation is increased. Overall, there are reasonable minimum socket depths to ensure the reliability of the socket connection. | ||
| Key Words | ||
| elastic-plastic fiber model; full-scale in-situ loading test; prestress degree; seismic performance; socket connection; socket depth | ||
| Address | ||
| Shuang Zou, Heisha Wenliuhan, Yanhui Liu, Zhipeng Zhai: Earthquake Engineering Research & Test Center, Guangzhou University, China; China Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology, Guangzhou, China; Key Laboratory of Earthquake Resistence, Earthquake Mitigation and Structural Safety, Ministry of Education, Guangzhou, China Chongbin Zhang: China Railway Engineering Design and Consulting Group Co., Ltd., Beijing, China | ||