- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | ZHU Shengchun, CUI Bing, SONG Yingtong, WANG Kangkang, HAN Yongan, ZHAO Canhui. Seismic Design Method of Ultra-High Performance Concrete Prestressed Connection of Prefabricated Bridge Pier[J]. Journal of Southwest Jiaotong University. doi: 10.3969/j.issn.0258-2724.20250103
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To enhance the industrialization level of the prefabricated bridge pier and develop connection forms compatible with the performance of the ultra-high performance concrete (UHPC) pier, an external prestressed connection joint and its tensioning process were proposed. The feasibility of this configuration and technique was validated through full-scale tests. Combined with finite element analysis, the influence of joint prestress and axial compression ratio on the performance of the UHPC pier was investigated, and a design method for prestressed joints based on the capacity design method was proposed. The research results have shown that the prefabricated pier with the external prestressed connection joint experiences typical bending failure, with the UHPC concrete of the pier body being crushed, but no interfacial separation occurs at the interface between the pier and the cap. The stress variation of the prestressed high-strength reinforcement is basically proportional to the horizontal load of the pier, with the maximum variation amplitude of only 9%, indicating that the connection performance of the external prestressed connection joint used in the specimen has reliable connection performance and good overall structural performance. When the tension force of the high-strength reinforcement in the pier is small, joint opening occurs at the interface between the pier and the cap, reducing the stiffness of the prefabricated bridge pier, but it has little effect on the peak load-bearing capacity of the specimen.
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