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圆钢管再生混凝土构件抗侧向冲击性能试验

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Keywords: 桥梁工程,钢管再生混凝土,试验研究,冲击荷载,时程曲线,残余位移,抗冲击承载力

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Abstract:

?为了给钢管混凝土拱桥的设计与施工提供参考,针对钢管混凝土拱桥中可以采用的钢管再生混凝土,考虑再生混凝土粗骨料取代率、落锤高度和轴压荷载等因素的影响,进行了侧向冲击荷载作用下两端嵌固圆钢管再生混凝土构件的试验研究。考察了再生混凝土粗骨料取代率、量纲一的初始动能和轴压比对圆钢管再生混凝土构件抗侧向冲击性能的影响,并比较其与圆钢管普通混凝土构件的差异。研究结果表明:侧向冲击荷载作用下圆钢管再生混凝土构件具有较好的力学性能;试件的最终形状呈"V"字形,且跨中残余位移随量纲一的初始动能的增加而显著增大。

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