摘要
采用改进后的变截面大尺寸Hopkinson压杆 ,对直径 62mm的聚丙烯纤维混凝土和素混凝土试件进行了三种应变率范围的冲击压缩试验 ,得到了不同应变率下试件的动态压缩强度及应力应变全过程曲线。结果表明 ,在冲击压缩的高应变率加载条件下 ,聚丙烯纤维混凝土的破坏强度与素混凝土的大致相同 ,但其韧性要明显好于素混凝土。
Using the larg-size improved Hopkinson pressure bar with variable cross-sections, that a shock compression test within three kinds strain rates range of the 62mm diameter plain concrete and polypropylene fiber reinforced concrete specimens havebeen carried out,then the dynamic compression strengths and the overall-process curves for stress-strain of specimens under different strain rates are obtained.The experimental results indicate that under the shock compression with high strain rate loading condition,The collapsing strength of polypropylene fiber reinforced concrete is roughly same with plain concrete,but the tenacity of polypropylene fiber reinforced concrete is obviously better than plain concrete.
出处
《土木工程学报》
EI
CSCD
北大核心
2004年第6期12-15,共4页
China Civil Engineering Journal
