超高性能混凝土(UHPC)在桥面板体系中的应用2020年度研究进展

超高性能混凝土（UHPC）与正交异性钢桥面板的组合是近年来桥梁工程中新材料、新构造研究的典型范例。UHPC桥面板的刚度较大，可以有效减小桥面板中的局部变形，从而明显降低正交异性钢桥面板中的疲劳应力幅，改善其抗疲劳性能。从新构造、剪力连接件性能、组合桥面板基本力学性能、组合桥面板疲劳性能及UHPC材料与构件力学性能等几个方面对UHPC-正交异性钢桥面板组合体系的研究进展进行综述，其内容主要为2020年以来发表的工作，部分兼及更早的研究成果。

State-of-the-art review of advances in the implementation of UHPC-OSD system in 2020

Ultra High Performance Concrete (UHPC)is combined with the Orthotropic Steel Deck (OSD)in a lot of projects nowadays. That is a typical example of the implementation of new materials and new structures in bridge engineering. Benefitting from its high stiffness, UHPC slab can evidently reduce the local deformation of OSD. In this way, we can greatly reduce the fatigue stress amplitude and the fatigue resistance is increased. In the present work, we reviewed the research advances on the composite UHPC-OSD system from five aspects: the new structures, the shear connectors, the basic static behaviors of the composite deck, the fatigue performance of the composite deck and the basic mechanical properties of UHPC or UHPC members. Most of the concerned literature was published in 2020 or 2021. However, some works reported in a few other recent years were still mentioned in the present work.