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对PVA纤维体积率从0%～2%的高性能水泥基复合材料(HPFRCC)圆柱体试件进行了6种不同围压下的常规三轴受压试验,研究其三轴受压性能,测得了极限抗压强度、峰值应变、极限应变以及应力-应变曲线。根据试验结果得出HPFRCC的极限抗压强度、峰值应变以及极限应变与侧向围压之间的关系。基于实测圆柱体应力-应变曲线的特点,提出了HPFRCC材料常规三轴受压本构模型。计算结果与试验数据的对比表明,根据该文模型所得的计算曲线与试验曲线吻合较好,研究成果可为HPFRCC结构非线性有限元分析提供依据。
The conventional triaxial compression tests under 6 different confining pressures were carried out on high performance cementitious matrix composites (HPFRCC) cylinder specimens with PVA fiber volume fraction from 0% to 2%. The triaxial compression tests Obtained ultimate compressive strength, peak strain, ultimate strain and stress-strain curve. According to the experimental results, the relationship between ultimate compressive strength, peak strain, ultimate strain and lateral confining pressure of HPFRCC was obtained. Based on the characteristics of the measured stress-strain curve of the cylinder, a conventional triaxial compression constitutive model of HPFRCC material was proposed. The comparison of the calculated results with the experimental data shows that the calculated curve obtained from the model is in good agreement with the experimental curve, and the research results can provide the basis for the nonlinear finite element analysis of HPFRCC structure.