岩土力学2009，Vol.30Issue(7)：1987-1992,1999,7.
考虑损伤阀值影响的钢纤维混凝土损伤本构模型研究
Study of damage constitutive model of SFRC considering effect of damage threshold
摘要
Abstract
Based on the characteristics of whole stress-strain curve of SFRC of different steel fiber volume ratios of laboratory test, the change of damage variable and the necessity of considering the influence of the damage threshold in developing the damage constitutive model of SFRC are discussed. Then, according to continuum damage theory and the statistical approaches of strength, the introduction of damage threshold based on the traditional Weibull random distribution of two parameters, the damage constitutive model of compression process of SFRC considering the damage threshold is proposed. This model can reflect the linear-elastic characteristics of SFRC deformation in low stress level or small deformation. Then when the value of damage threshold is determined by experience, the expression of two other parameters of Weibull random distribution is deduced through the geometric conditions of the whole stress-strain curve of SFRC. Finally, the analysis results of MATLAB contrast with uniaxial compression test results, it is shown that this model correctly reflects the stress-strain relation under uniaxial compression; and the value of damage threshold is discussed.关键词
钢纤维混凝土/损伤阀值/微元强度/本构模型Key words
SFRC/ damage threshold/ microcosmic element strength/ constitutive model分类
建筑与水利引用本文复制引用
薛云亮,李庶林,林峰,徐宏斌..考虑损伤阀值影响的钢纤维混凝土损伤本构模型研究[J].岩土力学,2009,30(7):1987-1992,1999,7.基金项目
国家自然科学基金(No. 10572122) （No. 10572122）
国家863计划(No. 2006AA06Z117) （No. 2006AA06Z117）
厦门大学人才引进项目(No.xk1005)资助. （No.xk1005）
