混凝土随机损伤本构关系--单轴受压分析

在混凝土受拉随机损伤本构关系研究基础上 ,进一步研究了混凝土单轴受压随机损伤本构关系 .通过考虑混凝土内部各组项的影响 ,建立了混凝土单轴受压损伤机理模型 .通过引入混凝土细观单元受拉破坏应变分布随机场 ,根据混凝土破坏过程的能量守恒原理 ,导出了混凝土受压破坏的随机损伤本构方程 .将导出的理论结果与试验研究进行了对比 ,效果良好 .

Study on Stochastic Damage Constitutive Law for Concrete Material Subjected to Uniaxial Compressive Stress

Based on the study of the stochastic damage constitutive of concrete material subjected to uniaxial tensile stress,this paper studies further the stochastic damage constitutive of concrete material subjected to uniaxial compressive stress.The mechanic model of concrete material subjected to uniaxial compressive stress is established by considering the effect of each composition in the concrete material.Through the introduction of the failure strain stochastic field of concrete material subjected to uniaxial tensile stress,and in the light of the energy conservation during the process of damage failure,the stochastic damage constitutive equation of concrete material subjected to uniaxial compressive stress is derived.In order to testify the validity of the model,the calculated result is compared with the experiment data.It is shown that the model fits well with the experiment data.