砌体结构开裂过程细观损伤数值模型及其分析方法

Constitutive damage model and its numerical method of cracking process of masonry structure

考虑材料的非均匀性特点,基于损伤力学和弹性脆性理论,提出了块体结构开裂过程数值分析方法,采用复合材料破裂过程数值分析(MFPA2D)模型,从细观力学层次上模拟了砌体结构试件局部荷载下从损伤到开裂破坏的全过程,数值模拟结果与试验结果较为吻合。验证了该理论分析方法的正确性和模型的合理性,对于理解砌体结构开裂的非线性过程、结构可靠性分析等具有重要意义。同时为砌体结构的破坏与失稳预测预报基础理论的研究提供新的分析方法。

In consideration of the heterogeneous characteristic of material and by virtue of the damage mechanics and elastic brittle theory, the numerical method was brought out to simulate the cracking process of masonry structure. The material failure process analysis (MFPA2D) model was set up to simulate the whole failure process of the masonry structure specimen from initiation to cracking. The numerical results keep in accordance with the experimental results, and validate the correctness of analysis method and the rationality of the model. It is helpful to research the non linear failure process of masonry structure and make the reliability analysis, and at the same time, a new method is applied to research the basic theory of forecasting the failure and seismicity of masonry structure.