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OA北大核心CSTPCD

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.