钢-UHPC组合桥面板性能分析及应用

The Performance Analysis and Application of Steel-UHPC Composite Deck

超高性能混凝土(UHPC)是一种高性能混凝土材料,在大跨结构中有着比一般混凝土更加宽广的前景。针对传统正交异性钢桥面板普遍存在的桥面板疲劳与桥面铺装易损坏等问题,提出钢-UHPC组合桥面板结构由薄UHPC桥面板以及钢梁组成,有着耐久性强、徐变收缩小、不易开裂、比强度大等优势,在大跨结构应用时,可以解决传统的钢桥面板铺装易损和桥面疲劳开裂等问题。

Ultra-high performance concrete(UHPC) is a high-performance concrete material, which has a broader prospect in long-span structure compared to ordinary concrete. For the problems of bridge deck fatigue and bridge deck pavement that is easily to be damaged existing commonly in traditional orthotropic steel bridge deck, this paper proposed steel-UHPC composite deck structure consisting of thin UHPC bridge deck and steel girder, which had advantages of strong durability, small creep and shrinkage, crack resistance and big specific strength that could solve the problems of vulnerability of traditional steel bridge deck pavement and bridge deck fatigue cracking during application of large-span structure.