摘要
根据混凝土材料断裂过程区存在尺寸效应这一特点,结合混凝土断裂韧度的尺寸效应规律,对混凝土有效裂缝扩展量进行了研究,得到反映尺寸效应规律的有效裂缝扩展量表达式,进而得到与试件尺寸相关的混凝土多裂纹等效断裂模型,使得多裂纹等效断裂模型更符合断裂过程区的尺寸效应规律。同时,通过与在实际工程中已用的其他模型的计算结果相比较,得出此模型比较可靠的结论。
According to character of procession of concrete material having size effect rule, effective crack propagation of concrete was investigated with size effect rule of fracture toughness of concrete, formula of effective crack propagation was obtained which reflected size effect rule, and then effective crack model of mulri-crack concrete was obtained which was relative with dimension of the specimen. It made the effective crack model of multi-crack be suitable to size effect rule of procession of concrete material. At the same time, It was verified that the model was credibility via comparing with other models＇ results.
出处
《水力发电》
北大核心
2006年第2期20-22,44,共4页
Water Power
基金
国家自然科学基金资助项目(50179002)
辽宁省教育厅科学研究计划(2004F105)
