混凝土断裂能产生尺寸效应的原因探讨  

Research on the cause of size effect for fracture energy of concrete

作　　者：王宝庭[1] 张廷毅[1] 高丹盈[1] 

机构地区：[1]郑州大学新型建材与结构研究中心,河南郑州450002

出　　处：《水利水电科技进展》2008年第6期9-11,70,共4页Advances in Science and Technology of Water Resources

基　　金：国家自然科学基金(59479001)

摘　　要：总结了关于混凝土断裂能尺寸效应产生原因的各种观点,并对这些观点进行简要评述。对RILEM的断裂能计算公式和Wecharatana提出的断裂能测算方法进行了详细研究,分析了断裂过程区演变对断裂能计算结果的影响,认为混凝土断裂能产生尺寸效应的原因之一是没有考虑混凝土主裂纹产生之前消耗的能量,并用实验对此观点进行了验证。Various opinions about the size effect on fracture energy of concrete are summed up and briefly analyzed. The influence of the evolution of the fracture process zone on the computed result of the fracture energy is analyzed. Wecharatana＇ s fracture energy calculation method is discussed. One of the reasons for the size effect is that energy consumption before the main cracks initiate is not taken into consideration, which is demonstrated by experimental results in this paper.

关 键 词：混凝土断裂能 尺寸效应 非弹性体 能量释放率 

分 类 号：TU528[建筑科学—建筑技术科学]