%0 Journal Article
%T 短切玄武岩纤维混凝土基本力学性能的尺寸效应<br>Size Effect of Basic Mechanical Properties of Chopped Basalt Fiber Reinforced Concrete
%A 王
%A 钧
%A 任靖豪
%A 郭大鹏
%J 建筑科学与工程学报
%D 2015
%X 为了研究短切玄武岩纤维混凝土试件尺寸变化对其基本力学性能的影响，对不同纤维长度（15，25 mm）、纤维体积掺量（0.1%，0.2%）、基体混凝土强度等级（C30，C40）的330个短切玄武岩纤维混凝土（BFRC）试件分别进行了立方体抗压强度、轴心抗压强度、劈裂抗拉强度、弯曲抗拉强度试验并对试验数据处理，以尺寸效应度反映尺寸效应规律。研究结果表明：玄武岩纤维混凝土立方体抗压强度试件的尺寸换算系数受混凝土的强度等级、纤维长度、纤维体积掺量的影响较小；轴心抗压强度的尺寸效应随混凝土强度等级、纤维长度、纤维体积掺量的增大均有所提高；劈裂抗拉强度随混凝土强度等级变化，其尺寸效应不明显，但随纤维长度的减小及纤维体积掺量的增加，尺寸效应有增大趋势；混凝土强度等级和纤维长度的改变对混凝土弯曲抗拉强度的尺寸效应影响不大，但随纤维体积掺量的增加，尺寸换算系数先减小后变大。<br>In order to study the influence of size effect on the basic mechanical properties of chopped basalt fiber reinforced concrete (BFRC), whose length was 15 mm or 25 mm, fiber volume content was 0.1% or 0.2%, concrete strength grade was C30 or C40. The cubic compressive strength, axial compressive strength, splitting tensile strength and flexural strength of 330 BFRC specimens were tested respectively and the experimental data were processed, the size effect law was reflected by the scale effect. The study results show that concrete strength grade, fiber length and fiber volume content have a little impact on the size conversion coefficient of cubic compressive strength. With the increase of concrete strength grade, fiber length and fiber volume content, the size effect of axial compressive strength shows a great improvement. Concrete strength grade has little effect on the size effect of splitting tensile strength, but the size effect shows an upward trend with fiber length decreases and fiber volume content increases. The size effect of flexural strength is little influenced by the concrete strength grade and fiber length, but the size conversion coefficient decreases firstly and then increases with the increase of fiber volume content
%K 玄武岩纤维
%K 混凝土
%K 力学性能
%K 尺寸效应&lt
%K br&gt
%K basalt fiber
%K reinforced concrete
%K mechanical property
%K size effect
%U http://jace.chd.edu.cn/oa/DArticle.aspx?type=view&id=20150514