玄武岩织物-钢-PVA工程水泥基复合材料单轴受压力学性能研究  

Uniaxial Compressive Mechanical Performance of Basalt Fiber Fabric-Steel-PVA Engineered Cementitious Composites

作　　者：车佳玲[1] 吴杰 谷家威 黄宇 刘海峰[1] CHE Jialing;WU Jie;GU Jiawei;HUANG Yu;LIU Haifeng(School of Civil Engineering and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]宁夏大学土木与水利工程学院,银川750021

出　　处：《硅酸盐通报》2024年第7期2363-2371,共9页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金青年基金(52068060);2023年大学生创新创业训练计划(202310749368);宁夏回族自治区水利工程一流学科(NXYLXK2021A03)。

摘　　要：本文研究了玄武岩织物和混杂短切纤维(钢纤维及PVA纤维,短切纤维总体积掺量为2%)复合作用对玄武岩织物-钢-PVA工程水泥基复合材料(BTR-HyECC)单轴受压力学性能的影响,并通过圆柱体单轴受压试验测得各试件受压性能指标,并绘制出应力-应变曲线。结果表明:当钢纤维掺量为0%(体积分数,下同)时,随着玄武岩织物的加入,试件的抗压强度、峰值应变以及抗压韧性显著提高;当钢纤维掺量增加到1%时,试件抗压强度和弹性模量达到最大;当钢纤维掺量为1.5%时,试件变形能力和抗压韧性达到最佳。基于试验数据,建立了适用于BTR-HyECC的单轴受压本构方程,拟合曲线与试验曲线吻合较好。The combined effect of basalt fiber fabric and hybrid short-cut fibers(steel fiber and PVA fiber,short-cut fibers overall volume fraction of 2%)on uniaxial compressive mechanical performance of basalt fiber fabric-steel-PVA engineered cementitious composites(BTR-HyECC)was investigated.Various compressive performance indicators of specimens were obtained through cylindrical uniaxial compressive tests,and stress-strain curves were plotted.The results indicate that,with a 0%(volume fraction,the same below)steel fiber content,the introduction of basalt fiber fabric significantly enhances compressive strength,peak strain,and compressive toughness of specimens.As the steel fiber content increases to 1%,compressive strength and elastic modulus of specimens reach maximum values,and when the steel fiber content is 1.5%,the deformability and compressive toughness of specimens reach optimum levels.Based on the experimental data,a uniaxial compressive stress-strain constitutive equation suitable for BTR-HyECC was established,which agree well with the experimental results.

关 键 词：玄武岩织物 混杂纤维 工程水泥基复合材料 单轴受压 本构方程 

分 类 号：TU528[建筑科学—建筑技术科学]