摘要
基于损伤力学和脆性理论,将砌体看成是由块体、砂浆、粘结带组成的三相材料,考虑砌体组成材料的非均匀性特点,提出了新的砌体开裂过程数值分析方法,利用材料破裂过程分析系统(MFPA2D),从细观力学层次上数值模拟了砌体试件在水平剪切荷载作用下从损伤到开裂破坏过程,模拟结果与试验结果较为吻合。验证了该数值分析方法的正确性和模型的合理性,同时为砌体开裂破坏预测预报基础理论的研究提供新的分析方法。
Based on damage mechanics and theory of masonry structure, a mesoscopic mechanics model of masonry structure is established. In the model, masonry is considered as a composite material consisting of block, mortar and block-mortar interface. The Material Failure Process Analysis (MFPA2D) system is used to simulate the fracture process of masonry. Under horizontal shear-compression loading condition, the crack propagation process is simulated with this model. The numerical results are in good agreement with experimental observations. It is found that the shear fracture of masonry is predominantly caused by tensile damage.
出处
《工程力学》
EI
CSCD
北大核心
2005年第2期56-61,共6页
Engineering Mechanics
基金
辽宁省自然科学基金(20021008)
中国博士后科学研究基金(2001-14-30)
关键词
砌体结构
数值分析
细观
开裂过程
剪切
Computer simulation
Fracture
Loading
Mortar
Shear stress
Tensile properties
