What is the hoop effect

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What is the hoop effect

date:[2019-03-28]     pk_hits:
测定混凝土立方体试件抗压强度,也可以按粗骨料大粒径的尺寸而选用不同试件的尺寸。
但是试件尺寸不同、形状不同,会影响试件的抗压强度测定结果。
因为混凝土试件在压力机上受压时,在沿加荷方向发生纵向变形的同时,也按泊松比效应产生横向膨胀。而钢制压板的横向膨胀较混凝土小,因而在压板与混凝土试件受压面形成摩擦力,对试件的横向膨胀起着约束作用,这种约束作用称为"环箍效应"
环箍
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