【摘要】 从细观力学和断裂力学的角度分析了混凝土材料中骨料和水泥砂浆界面上变温引起的开裂损伤 ,给出了裂缝随温度变化的扩展规律 ,将损伤变量表达为温度的函数 ,从而为计算大体积混凝土结构施工期由于变温而造成的损伤提供了理论基础 .研究结果表明常温下的变温荷载亦会引起混凝土材料力学性能的变化 .更多还原

【Abstract】 In this paper, thermal damage on the interface between aggregate and cement paste of concrete is analyzed by micro mechanics and fracture mechanics.An analytical expression with the damage variable as a function of temperature increase is obtained and elastic modulus, increasing with age, is considered in the expression. The study reveals that temperature increase leads to deterioration of concrete property.更多还原