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Composite Slab Crack Widths Considering Shrinkage and Gravity Loading

机译:考虑收缩和重力载荷的复合板裂缝宽度

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An experimental study was conducted on steel fibre-reinforced concrete (SFRC) composite slabs to quantify crack width resulting from shrinkage and gravity loading. Ten full scale slab specimens were evaluated with different types of bond between the concrete and deck (e.g., greased, unembossed deck, regular deck) and different amounts of concrete reinforcement (e.g., mesh, steel fibre). Concrete shrinkage was measured and monitored over a period of 74 days, and then slabs were tested under increasing load. Each was continuous over two spans and two line loads were applied on each span. Relationships between crack size/distribution were obtained for each slab for different levels of applied load.
机译:对钢纤维混凝土(SFRC)复合板进行了一项实验研究,以量化由收缩和重力载荷引起的裂缝宽度。评估了十个全尺寸板状试样,它们在混凝土和桥面之间有不同类型的粘结(例如,油脂,未浮雕的桥面,常规桥面)和不同数量的混凝土增强材料(例如网眼,钢纤维)。在74天的时间内对混凝土的收缩率进行了测量和监控,然后在增加的载荷下对板进行了测试。每个跨两个跨度连续,并且在每个跨度上施加两个线荷载。对于不同水平的施加载荷,获得了每个平板的裂纹尺寸/分布之间的关系。

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