钢纤维增强自应力混凝土冲击功统计分析  

Statistical analysis of impact energy on steel fiber reinforced self-stressing concrete

作　　者：王国超[1] 王伯昕[1] 赵建宇[1] 许晓慧[1] 

机构地区：[1]吉林大学建设工程学院,吉林长春130061

出　　处：《混凝土》2016年第2期70-73,共4页Concrete

基　　金：国家自然科学基金资助项目(51108207);吉林省青年科研基金资助项目(201201057)

摘　　要：利用摆锤试验机进行了672块简支弯曲试件的冲击试验,获得了普通混凝土、钢纤维混凝土以及钢纤维自应力混凝土试件冲击破坏的吸收功,并根据各自的耗能值对其抗冲击性能作了比较,发现体积率为1%的钢纤维对于自应力混凝土基体的增强作用强于普通混凝土基体;随着钢纤维体积率的增加,试件吸收功会出现拐点,极值出现在2%到3%之间;并通过K-S检验法和Weibull分布理论对试验结果进行了非参数统计推断,得出钢纤维体积率为0.5%的自应力混凝土试件冲击功为泊松分布而其他钢纤维体积率的自应力混凝土试件冲击功均符合Weibull分布。A number of 672 specimens were impacted in the three - point bending situation with pendulum machine. The energy absorb- ing of concrete, steel fiber reinforced concrete and steel fiber reinforced self - stressing concrete test specimens were obtained. Compared the impact capacity with respective energy consumption,it concluded that the energy absorbing of steel fiber reinforced self - stressing concrete test specimens with same fiber volume content was higher than that of same volume content steel fiber reinforced concrete specimens.The energy consumption of specimens would come to a inflection point as the volume content raising and the extreme value was between 2%and 3%.Lastly,the results were nonparametric inference by K -S and Weibull examination and all the groups were sat- isfied to Weibull distribution except for those steel fiber reinforced self - stressing concrete test specimens with 0.5%fiber volume con- tent fitted to Poisson distribution properly.

关 键 词：钢纤维 自应力混凝土 冲击功 概率分布 

分 类 号：TU528.572[建筑科学—建筑技术科学]