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以连续介质损伤力学为基础 ,以侧向应力和最大竖向应变二者的组合来表征混凝土所经历过的荷载历史 ,以抗压强度劣化来表征混凝土损伤 ,对 1 0cm× 1 0cm× 1 0cm的立方体试件进行了损伤试验、分析及研究 .本文研究了不同围压条件下 ,单调和循环加载历史产生混凝土损伤的发展演化规律 .根据试验结果拟合得到损伤的演化方程 ,分析了影响损伤发展的主要因素 ,阐明了其原因 .从中可以看出 ,用抗压强度劣化来估测混凝土结构的损伤在工程实践中非常方便实用 .
Based on the continuum damage mechanics, the load history of the concrete is characterized by the combination of the lateral stress and the maximum vertical strain, and the damage of the concrete is characterized by the deterioration of the compressive strength. The damage of the concrete to 100 cm × 100 cm × 100 cm Of cubic specimens were tested, analyzed and studied.This paper studied the development and evolution of concrete damage caused by monotonous and cyclic loading history under different confining pressure conditions.According to the experimental results, the evolution equations of damage were fitted and the influences of damage The main factors of development and clarification of the reasons can be seen from the deterioration of compressive strength to assess the damage of concrete structures in engineering practice is very convenient and practical.