【作者】 时冬冬； 刘岳鑫； 尹机会； 丁一宁；

【Author】 SHI Dong-dong, LIU Yue-xin,YIN Ji-hui, DING Yi-ning (Dalian University of Technology, Dalian 116023, China)

【机构】 大连理工大学土木系；

【摘要】 为了研究不同类型钢纤维对低强度混凝土力学性能的影响,本文参照日本纤维混凝土标准(JSCE),进行了纤维混凝土强度及抗弯全曲线实验,分析了不同掺量,不同长径比的端部弯钩型钢纤维对低强度混凝土的增强增韧效果。实验结果表明,纤维的加入改善了混凝土的韧性,对混凝土的抗压强度影响甚微。长纤维以及大长径比纤维可较好地改善混凝土的韧性。更多还原

【Abstract】 In order to evaluate the fiber effect on the strength and ductility of concrete, the experiment investigation has been carried out according to the JSCE. In this investigation the fiber was considered to be the hooked-end fiber. The variables were volume fractions of steel fiber which are varying from 0 to 0.5%, and the aspect ratio (1/d) of steel fiber. The results indicate that additon of steel fiber improves the ductility of concrete greatly, but have infinitesimal impact on compressive strength of fiber reinforcement concrete. The fibers which aspect ratio is 60 are more effective than the ones of 35 and 45 in improving toughness.更多还原