面向未来的高性能桥梁结构研发与应用

发布时间：2018-04-29 10:47

本文选题：桥梁工程 + 技术瓶颈　；参考：《建筑科学与工程学报》2017年05期

【摘要】：为从根本上解决混凝土桥、钢桥及钢-混凝土组合桥中的共性技术难题,并提升桥梁结构的性能与品质,笔者团队以超高性能混凝土(UHPC)为基础,研发了面向未来的高性能桥梁结构体系。介绍了笔者团队研发的4类高性能桥梁结构:(1)钢-超高韧性混凝土(STC)轻型组合桥面结构,其中的STC是钢桥面专用的UHPC;(2)钢-UHPC华夫板轻型组合桥梁结构;(3)单向预应力UHPC薄壁连续箱梁结构;(4)全预制快速架设UHPC城市桥梁结构。通过大量静力和疲劳试验,掌握了各类UHPC桥梁结构的基本受力性能,并建立了计算理论和设计方法。列举了钢-STC轻型组合桥面结构已推广应用于中国的17座钢桥,涵盖了梁桥、拱桥、斜拉桥和悬索桥等各类基本桥型,典型应用包括湖南岳阳洞庭湖二桥等重大工程。到目前为止,各实桥运营状态良好,钢-STC未出现任何病害问题。综合而言,高性能桥梁结构有望突破现有桥梁中的技术瓶颈,具有广阔的应用前景。
[Abstract]:In order to fundamentally solve the common technical problems in concrete bridge, steel bridge and steel-concrete composite bridge, and improve the performance and quality of bridge structure, the author's team based on UHPC. The future-oriented high-performance bridge structure system is developed. This paper introduces the light composite deck structure of four kinds of high performance bridge structure: 1) steel and super high toughness concrete (STC) developed by the author's team. The STC is the special steel deck UHPC2) steel-UHPC-Wafu plate light-duty composite bridge structure Q3) unidirectional prestressed UHPC thin-walled continuous box girder structure and 4) fully prefabricated and rapid erection of UHPC urban bridge structure. Through a large number of static and fatigue tests, the basic mechanical properties of various UHPC bridge structures are grasped, and the calculation theory and design method are established. The steel STC light composite deck structure has been popularized in 17 steel bridges in China, covering various basic bridge types such as beam bridge, arch bridge, cable-stayed bridge and suspension bridge. Typical applications include the second Dongting Lake Bridge in Yueyang, Hunan Province. So far, the actual operation of the bridge is in good condition, steel-STC does not have any problem. Generally speaking, the high performance bridge structure is expected to break through the technical bottleneck of the existing bridges and has a broad application prospect.
【作者单位】：湖南大学风工程与桥梁工程湖南省重点实验室;
【分类号】：U441

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