超高性能混凝土在国内外桥梁工程中的研究与应用进展

超高性能混凝土(UHPC)是一种新型的水泥基复合材料,因具有优异的力学性能和耐久性能而受到了广泛关注,并开始应用于桥梁工程领域。着重介绍了UHPC在国内外桥梁工程中的应用进展,并分析了其在国内桥梁工程中的应用前景。据不完全统计,截至2016年底,国内外已有超过400座桥梁采用UHPC作为主要或部分建筑材料。国内学者针对UHPC的优异性能,开展了一系列的UHPC桥梁结构研发工作,结果表明UHPC结构可有效减轻结构自重,提高结构的跨越能力,适合装配化施工,有望解决现有常规桥梁结构存在的诸多技术难题,具有广阔的应用前景。目前,UHPC在国内桥梁工程中已逐渐开始获得应用,今后应进一步结合实际工程需要开展应用技术研究,形成应用指南或技术标准。

A Review on the Research and Application of Ultra-high Performance Concrete in Bridge Engineering Around the World

Ultra-high performance concrete (UHPC),as a new type of cement based composite material,has captured extensive attention due to its excellent mechanical properties and durability,also has begun to achieve successful application to the field of bridge engineering.This paper places emphases on introducing the application of UHPC and its prospect in bridge engineering.The incomplete statistics indicate that,in the end of 2016,there were more than 400 bridges employing UHPC as a major or part of the component materials in the world.A series of research on the excellent properties of UHPC imply that the UHPC-based structure can effectively reduce the structural weight and improve the spanning ability of structure,and is suitable for assembly construction.The UHPC bridge is expected to solve the existing technical problems,and shows widespread application prospects.At present,UHPC bridge project has gradually been utilized in China's bridge engineering,and the next task is the establishment of technical guidelines and specifications based on practical engineering requirements.