预制装配式混凝土桥梁结构2020年度研究进展

预制装配式桥梁凭借施工质量好、对环境的影响小、现场作业时间短、施工安全水平高等优势，已成为桥梁建设的重要发展方向。预制装配式混凝土桥梁既适合于交通复杂的城市道路桥梁，也适合于施工环境艰苦的铁路桥梁建设。通过文献调研的方式，梳理2020年度国内外预制装配式混凝土桥梁的研究进展。根据桥梁结构类型，从上部结构与下部结构两个方面论述了该领域内的新技术、新构造以及典型工程应用。经过粗略总结，在上部结构中，节点的连接构造、抗裂性能与耐久性得到了学者的广泛关注；在下部结构中，随着预制装配式体系在高烈度地震区桥梁中的应用，预制装配式桥墩的构造与抗震性能是目前的研究热点。下部结构的耐久性与抗裂性能仍有待提升。

State-of-the-art review of prefabricated concrete bridge structures in 2020

Prefabricated bridges have became an important development direction of bridge construction due to the advantages of good construction quality, low impact on the environment, short on-site operation time, and high level of construction safety. Prefabricated concrete bridges are not only suitable for urban road bridges with complex traffic, but also for railway bridges in difficult construction environments. This paper sorts out the research progress of prefabricated concrete bridges at home and abroad in 2020 through the method of literature analysis. According to the types of bridge structure, new technologies, new structures and typical engineering applications in this field are discussed from two aspects: the upper structure and the lower structure. After a rough summary in this article, in the superstructure, the connection structure, crack resistance and durability of the nodes have received extensive attention from scholars; in the substructure, as the prefabricated system is applied to the bridge in the high-intensity earthquake area, the structure and seismic performance of prefabricated bridge piers are currently hot research topics. The durability and crack resistance of the substructure still need to be improved.