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
车佳玲 1吴杰 1谷家威 1黄宇 1刘海峰1
作者信息
- 1. 宁夏大学土木与水利工程学院,银川 750021
- 折叠
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.
Abstract
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Key words
basalt fiber fabric/hybrid fiber/engineered cementitious composites/uniaxial compressive/constitutive equation引用本文复制引用
基金项目
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)
出版年
2024
国家科技期刊平台
NSTL
万方数据