What is the hoop effect

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What is the hoop effect

date:[2019-03-28]     pk_hits:
測定混凝土立方體試件抗壓強度,也可以按粗骨料大粒徑的尺寸而選用不同試件的尺寸。
但是試件尺寸不同、形狀不同,會影響試件的抗壓強度測定結(jié)果。
因為混凝土試件在壓力機上受壓時,在沿加荷方向發(fā)生縱向變形的同時,也按泊松比效應(yīng)產(chǎn)生橫向膨脹。而鋼制壓板的橫向膨脹較混凝土小,因而在壓板與混凝土試件受壓面形成摩擦力,對試件的橫向膨脹起著約束作用,這種約束作用稱為"環(huán)箍效應(yīng)"
環(huán)箍
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