基于Weibull强度理论的混凝土冻融损伤本构模型研究  

Study of the freezing-thawing damage constitutive model of concrete based on Weibull's strength theory

作　　者：关虓[1] 牛荻涛[1] 王家滨[1] 王艳[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《混凝土》2015年第5期5-9,13,共6页Concrete

基　　金：国家自然科学基金(51278403);国家自然科学基金青年基金项目(51308445);陕西省"13115"科技创新工程重大科技专项项目(2010ZDKG-55)

摘　　要：将统计学方法与细观力学方法结合,采用平行杆模型模拟混凝土等脆性材料单轴受压的损伤演化规律。研究了基于Weibull强度理论的混凝土细观统计损伤本构模型,并通过冻融后的混凝土单轴受压本构试验,拟合出模型相关参数m和ε0,提出了基于细观统计损伤力学的混凝土冻融损伤本构方程。最后通过非线性有限元分析软件ABAQUS对提出的模型进行数值模拟,并与试验结果对比分析,验证了所提出模型的合理性。Statistical methods was combined with micromechanics.Based on the parallel bar system,the damage law of the concrete ma-terials subjected to uniaxial compressive stress was simulated.Furthermore,the meso - statistical damage constitutive of concrete materi-als was studied base on Weibull′s statistical theory of the strength of materials.While according to constitutive uniaxial compression test of concrete material after freezing and thawing,the parameters m and ε0 of the model were fitted.Then the freezing - thawing damage constitutive equation of concrete was proposed base on meso - statistical damage mechanics.Finally,the model was simulated by non -linear finite element analysis software ABAQUS,then compared with the experimental results,and the rationality of the proposed model was verified.

关 键 词：细观统计力学 平行杆模型 Weibull 强度理论 损伤本构模型 数值模拟 

分 类 号：TU37[建筑科学—结构工程]