预制拼装桥墩抗震技术发展及展望

Development and Prospect of Seismic Technology of Prefabricated Bridge Piers

摘要:

预制拼装桥墩符合可持续发展要求，具有施工高效、构件质量高等优点。为促进预制拼装桥墩的技术进步和实际工程应用，从连接构造及其抗震性能、高性能材料的应用等方面，总结了相关技术的发展。结果表明：预制拼装桥墩在抗震性能方面具有潜力，并展现出一定优势；然而，预制拼装桥墩与现浇桥墩在裂缝分布、钢筋应变和接头变形等方面存在差异，需进一步探索提高位移延性和耗能能力的方法；后张预应力预制拼装桥墩有自复位能力，但墩底混凝土的损伤修复困难，可通过混合式连接方法改善。高新材料如UHPC、CFRP和SMA的应用，有助于提高其抗震性能，未来可聚焦于损伤修复技术、耐久性改进和多项劣化耦合作用的影响，以进一步提升预制拼装桥墩的性能。

Abstract:

Prefabricated bridge piers meet the requirements of sustainable development and have the advantages of high construction efficiency and high component quality. In order to promote the technological progress and practical engineering application of prefabricated bridge piers, the technological development is summarized from the connection structure and its seismic performance, the application of high-performance materials and other aspects. The results show that prefabricated bridge piers have potential in seismic performance and show certain advantages. However, there are differences between the prefabricated bridge piers and cast-in-place piers in terms of crack distribution, reinforcement strain and joint deformation, and it is necessary to further explore the method to improve the displacement ductility and energy-consuming capacity. The post-tensioned prestressed prefabricated bridge piers have self-resetting ability, but the concrete damage at the bottom of the pier is difficult to repair, which can be improved by hybrid connection methods. The application of high-tech materials such as UHPC, CFRP and SMA can help to improve the seismic performance. In the future, the focus can be on the damage repair techniques, durability improvement, and the effects of coupled effects of multiple deteriorations to further enhance the performance of prefabricated bridge piers.