EPS混凝土的动态抗压强度和吸能特性

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (17) : 133-137.

论文

EPS混凝土的动态抗压强度和吸能特性

巫绪涛1 谢思发1 胡俊2

作者信息 +

Dynamic compressive strength and energy absortion property of EPS concrete

WU Xutao1 XIE Sifa1 HU Jun2

Author information +

文章历史 +

摘要

制备了聚苯乙烯(expanded polystyrene，EPS)体积含量0～40%的混凝土试样。利用分离式Hopkinson压杆(split Hopkinson pressure bar，SHPB)对其进行了冲击压缩试验，得到了不同应变率下的应力–应变曲线。发现EPS混凝土具有与常规混凝土显著不同的应变率效应。研究了两种EPS粒径，四种EPS含量的EPS混凝土的抗压强度与应力率的关系，并给出了经验公式。定义了能够表征EPS混凝土吸能性能的韧度指数，并研究了上述种类EPS混凝土韧度指数与应力率的关系。随EPS体积增加，其韧度指数大大增加，尤其是对于小粒径EPS混凝土。

Abstract

The expanded polystyrene(EPS) concrete specimens with 0～40% EPS volume conent were prepared. Dynamic compressive experiments were carried on using the split Hopkinson pressure bar(SHPB). The stress–strain curves of EPS concrete under different strain rate were obtained. The result indicated that the strain rate effects of EPS concrete is obviously different from normal concrete. The relations between the compression strength and the stress rate were investigated for two types of EPS bead size and four types of EPS volume content. The empirical formulas were given too. The toughness index for characterizing EPS concrete energy–absorption properties was defined. The relations between toughness index and stress rate were researched for the above types of EPS concrete. The toughness index of EPS concrete increased significantly with the EPS volume content increasing, especially for EPS concrete with small bead size.

导出引用

巫绪涛谢思发胡俊. EPS混凝土的动态抗压强度和吸能特性[J]. 振动与冲击, 2013, 32(17): 133-137

WU Xutao XIE Sifa HU Jun. Dynamic compressive strength and energy absortion property of EPS concrete[J]. Journal of Vibration and Shock, 2013, 32(17): 133-137