碳纤维混杂纤维混凝土抗冲击性能研究  

Impact mechanical properties of concrete reinforced with hybrid carbon fibers

作　　者：王璞[1] 黄真[1] 周岱[1] 王贤栋[1] 张昌[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院土木工程系,上海200240

出　　处：《振动与冲击》2012年第12期14-18,共5页Journal of Vibration and Shock

基　　金：国家自然基金项目(51178265)

摘　　要：对比美国混凝土学会的混凝土落锤冲击试验装置,自行设计了混凝土落锤弯曲冲击试验装置,进行了不同几何尺寸及弹性模量的碳纤维、钢纤维和聚丙烯纤维混凝土的抗冲击力学性能试验研究。分析比较了不同纤维几何尺寸和弹性模量、种类和掺量对混杂纤维混凝土抗冲击性能的影响和增强机理。通过定义混杂效应系数,可定量评价混凝土抗冲击力学性能的正混杂效应。研究表明:纤维可以明显提高混凝土的抗冲击强度,其中碳纤维混杂纤维混凝土的提高幅度更为显著。An impact bending test method for concrete and test equipments were developed compared with impact test methods suggested by the ACI,and the impact mechanical properties of hybrid fiber reinforced concrete（HyFRC） with different kinds and percents of carbon fiber,steel fibers and polypropylene fiber were investigated,and the effect of fiber types and contents on HyFRC’s impact performance was analyzed.A hybrid factor to evaluate quantitatively the positive hybrid effect of concrete anti-impact behavior was suggested.The study results showed that hybrid carbon fiber reinforced concrete has better impact resistance capacity compared with that of ofher concrete.

关 键 词：抗冲击性能 混杂纤维混凝土 钢纤维 碳纤维 聚丙烯纤维 

分 类 号：TU528.572[建筑科学—建筑技术科学]