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对9块钢板-混凝土组合板试件进行了单点和两点对称集中加载静力试验研究,分析了组合板中栓钉间距、钢板厚度、混凝土板厚度和组合板几何尺寸等因素对组合板受弯承载性能的影响。对组合板试件的破坏形态、钢板与混凝土应变发展情况、裂缝发展情况及组合板承载能力进行了研究。试验结果表明:钢板-混凝土组合板的破坏形式主要有钢板剥离破坏、混合破坏、剪切破坏;在加载过程中,截面纵向应变沿组合板高度基本符合平截面假定;栓钉间距、混凝土板厚对组合承载力影响较大,两者变化时对应的承载力最大增幅分别为45%和42%,而钢板厚度影响次之,承载力增幅最大为20%,组合板几何尺寸影响最小。推导了考虑交界面滑移效应的组合板受弯承载力的计算式,计算结果与试验结果吻合良好。
Nine steel-concrete composite specimens were subjected to one-point and two-point symmetric concentrated static loading tests. The factors such as the spacing of pegs, the thickness of steel plate, the thickness of concrete slab and the geometric dimensions of the composite plate were analyzed. Bending load carrying capacity. The failure mode of the composite plate specimen, the strain and strain of the steel plate and concrete, the development of the cracks and the carrying capacity of the composite plate were studied. The results show that the main failure modes of the steel plate-concrete composite plate are the peel failure, mixing failure and shear failure. During the loading process, the longitudinal strain along the composite plate basically conforms to the plane cross-section assumption; the spacing between the pegs, the concrete plate thickness Which has a great influence on the combined bearing capacity. The maximum increase of the corresponding bearing capacity is 45% and 42% respectively, while the influence of the thickness of the steel plate is the second, the maximum increase of the bearing capacity is 20% and the geometrical size of the composite plate is the least. The formulas for calculating the flexural bearing capacity of composite plate considering the interface slip effect are derived. The calculated results are in good agreement with the experimental results.