钢纤维类型对混凝土动态力学性能影响试验研究  

Experiment study on effect of types of steel fiber on dynamic mechanics properties of concrete

作　　者：吕磊 卫振海 LV Lei;WEI Zhenhai(Union Service College of National Defence University, Rear Professional Service Department,Beijing 100089, China)

机构地区：[1]国防大学联合勤务学院联合后勤保障系,北京100089

出　　处：《新型建筑材料》2018年第4期47-51,共5页New Building Materials

基　　金：国家自然科学基金项目(50504014)

摘　　要：利用SHPB试验系统对4种不同类型钢纤维混凝土进行了动态力学性能测试,探讨了钢纤维类型和各正交因素对钢纤维混凝土动态抗压强度的影响,并进行了最优化分析。结果表明,波纹形钢纤维更适合在低、中应变率的冲击压缩情况下使用;弓形、压棱形钢纤维的增强效果在高应变率时更为显著;平直形钢纤维的增强效果随应变率提高而减弱。4种钢纤维中,弓形钢纤维对混凝土破坏形态的改善效果最好。Four kinds of different steel fiber type concrete were carried out dynamic mechanics properties experiment by use of SHPB experimental system. The influence of steel fiber type and orthogonal factors on the dynamic compressive strength of SFRC was discussed, and optimization analysis was carried out. The experimental result demonstrated that corrugated steel fiber is more suitable for low and middle strain rate impact cases,while bow and prismatic shaped steel fiber has more significant reinforce effect in high strain rate case. The enhanced effect of the flat-type steel fiber is reduced when strain rate is improved. Among the four kinds of different steel fiber, bow shaped steel fiber has the best improvement effect on destroyed form of the concrete.

关 键 词：钢纤维混凝土 SHPB 动态力学性能 

分 类 号：TU528.043[建筑科学—建筑技术科学]