砌体受压本构关系模型  

Constitutive relationship model for masonry materials in compression

作　　者：杨卫忠[1] 

机构地区：[1]同济大学

出　　处：《建筑结构》2008年第10期80-82,共3页Building Structure

摘　　要：通过一个细观模型,从细观层次上分析了砌体在单调受压荷载作用下的损伤破坏机制,解释砌体受压应力-应变关系的非线性和应变软化,根据单元体平衡条件,建立了砌体单调轴心受压时的损伤本构关系模型,基于细观单元体强度分布特征确定损伤演化,利用应力-应变曲线特征条件和标准试件强度值确定模型参数,分析得出应力-应变关系仅与砌体的峰值点割线弹性模量与原点切线弹性模量有关,该式能反映砌体受压试验所表现的特征,与已有受压结果吻合良好。The masonry materials damage which has been caused by monotonic axial loading is analyzed from mesoscopic failure. The nonlinear performance of stress-strain curve of masonry is studied by using a class of meso-damage model. By using of the equilibrium of force, a damage constitutive model of masonry subjected to axial monotonic loading is established. The evaluation of damage is determined by strength distribution of the material, and the coefficients used in the model can be determined by the condition of the curve on the characteristic points. It is found that the stress-strain relationship can be uniquely determined by the scant shear modulus and tangent modulus. The relationship can also reflect all characteristics that shown in tests and has a good agreement with existed stress-strain curves.

关 键 词：砌体 本构关系 损伤 受压 

分 类 号：TU442[建筑科学—岩土工程] TU375.3[建筑科学—土工工程]