纤维打团效应对纤维混凝土抗拉性能的影响  

EFFECT OF FIBER CLUSTERING EFFECT ON THE TENSILE PROPERTIES OF FIBER REINFORCED CONCRETE

作　　者：贺晶晶[1] 师俊平[1] 王玮 邹浩飞[3] 李煜 HE Jing-jing , SHI Jun-ping , WANG Wei1, ZOU Hao-fei3(1. Civil Engineering ＆ Architecture College, Xi＇an University of Technology, Xi＇an 710048, China; 2. Baoji University of Arts and Sciences, Baoji 721016, China; 3. China Nuclear Hua Tai Construction Co., Ltd., Shenzhen 518055, Chin)

机构地区：[1]西安理工大学土木建筑工程学院,西安710048 [2]宝鸡文理学院,宝鸡721016 [3]中核华泰建设有限公司,深圳518055 [4]西安地下铁道有限责任公司,西安710016

出　　处：《玻璃钢／复合材料》2018年第3期38-44,共7页Fiber Reinforced Plastics/Composites

基　　金：国家自然科学基金(11302167;11402198)

摘　　要：针对纤维在混凝土中存在的打团效应引入了纤维均分系数,并建立了六种纤维打团模型。基于复合材料的力学理论,分析了纤维打团效应对纤维混凝土(FRC)抗拉性能的影响。结果表明:纤维均分系数随打团纤维根数的增大而减少;纤维打团效应的存在导致纤维临界体积掺加率有一定程度的增大,FRC的抗拉强度有不同程度的减小;FRC抗拉强度的损失与纤维临界体积掺加率均随纤维打团含量的增大而增大;考虑纤维打团效应的FRC拉伸强度计算值与试验值较为接近。The fiber sharing coefficient is introduced to characterize the fiber clustering effect in concrete.Meanwhile,six kinds of fiber cluster model are established. According to mechanics theory of composite materials,the influence of fiber clustering effect on the tensile properties of fiber reinforced concrete（ FRC） is analyzed. The results show that fiber share coefficient is decreased with the increase of fiber number of fiber agglomerates. The existence of fiber clustering effect leads to the increase of the fiber critical volume fraction to a certain degree and the decrease of the tensile strength of FRC in different degrees. The loss of FRC tensile strength by and critical volume fraction are increased with the increase of fiber cluster content. The calculated values of FRC tensile strength by considering fiber clustering effect are close to the experimental results.

关 键 词：纤维混凝土 抗拉性能 纤维打团效应 纤维均分系数 

分 类 号：TB332[一般工业技术—材料科学与工程]