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,根据能量原理,建立了砌体轴心受压时的损伤本构关系模型,提出一类损伤函数表达式,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,与已有受压结果相比较,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 mesoscopic springs model. With the help of the theory of energy, a damage constitutive model of masonry subjected to axial monotonic loading is established. The function of damage is suggested, 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 were shown in tests and has a good agreement with the existed stress- strain curves.
出处
《郑州大学学报（工学版）》
CAS
2007年第1期47-50,共4页
Journal of Zhengzhou University（Engineering Science）
基金
郑州大学青年骨干教师基金资助项目
关键词
砌体
应力-应变关系
损伤
受压
masonry
stress - strain relationship
damage
compression
