冲击荷载作用下早强EPS混凝土的力学性能

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振动与冲击 ›› 2011, Vol. 30 ›› Issue (3) : 269-273.

论文

冲击荷载作用下早强EPS混凝土的力学性能

丁国博1;许金余1,2;胡泽斌1;席峰1;白二雷1

作者信息 +

Mechanical Properties of Early-strengthened Polystyrene Concrete Under impact Load

Ding Guobo1;Xu Jinyu1,2; Hu Zebin1;Xi Feng1;BAI Erlei1

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文章历史 +

摘要

采用100mm分离式霍普金森压杆（split Hopkinson pressure bar,简称SHPB）试验装置，对养护龄期分别为12h、24h和36h的早强聚苯乙烯混凝土（EPS）进行了冲击压缩试验，得到了相应的应力-应变曲线，并与养护龄期为28d的聚苯乙烯混凝土（EPS）的应力-应变曲线进行比较。结果表明：养护龄期为36h、28d的EPS混凝土随着应变率的增加，其冲击压缩强度也相应增加；养护龄期为12h、24h的EPS混凝土随着应变率的增加，其冲击压缩强度变化不明显。另外，还研究了试件动态抗压强度与平均应变率的关系和养护龄期对动态抗压强度的影响，证明了EPS混凝土的抗冲击性能随养护龄期的增长而增加。

Abstract

The dynamic mechanic properties of early-strengthed polystyrene(EPS) concrete under 12 hours’, 24 hours’ and 36 hours’ maintenance duration were studied using split Hopkinson pressure bar(SHPB) apparatus. The corresponding stress-strain curves were gained, which was compared with the stress-strain curve of EPS concrete under 28 days’ maintenance duration. The results show that the dynamic compressive strengthes of EPS concrete under 36 hours’ and 28 days’ maintenance duration increase with the enhancing of strain rate, however the dynamic compressive strengthes of EPS concrete under 12 hours’ and 24 hours’ maintenance duration don’t increase obviously with the strain rate. Also the relation between dynamic compressive strength and average strain rate and influence of maintenance duration to dynamic compressive strength were researched. It is showed that the impact mechanics properties of EPS concrete increase with the enhancing of maintenance duration.

导出引用

丁国博;许金余;胡泽斌;席峰;白二雷. 冲击荷载作用下早强EPS混凝土的力学性能[J]. 振动与冲击, 2011, 30(3): 269-273

Ding Guobo;Xu Jinyu;Hu Zebin;Xi Feng;BAI Erlei. Mechanical Properties of Early-strengthened Polystyrene Concrete Under impact Load[J]. Journal of Vibration and Shock, 2011, 30(3): 269-273