Study on equivalent strength for crack directors of RCC arch dam based on size effect rule  

作　　者：王学志 宋玉普 董锦坤 黄志强 

机构地区：[1]College of Civil Engineering, Liaoning University of Technology [2]State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology [3]Physics Department, Shenyang University of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2009年第2期149-153,共5页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.50179002,50709013);Liaoning Province Dr. Fund(Grant No.20071025)

摘　　要：The size effect rule of roller compacted concrete (RCC) fracture toughness was reached on the analysis of fracture toughness of RCC specimens, which have been done by project team. And then the rule was applied to the calculation formula of equivalent strength of crack director in the RCC arch dam, thus a simple and useful formula was reached. The study shows that the equivalent strength of crack directors increases with the increasing intensity of concrete, but the surplus rate of strength of crack directors section decreases with the increasing intensity of concrete and the distance between centers of adjacent crack directors, and that bilateral interval crack directors are more efficient in weakening the strength of section than unidirectional interval crack directors in the case of the same distance between adjacent crack director centers. A good design for crack directors of RCC arch dam is proposed via the rule.The size effect rule of roller compacted concrete （RCC） fracture toughness was reached on the analysis of fracture toughness of RCC specimens, which have been done by project team. And then the rule was applied to the calculation formula of equivalent strength of crack director in the RCC arch dam, thus a simple and useful formula was reached. The study shows that the equivalent strength of crack directors increases with the increasing intensity of concrete, but the surplus rate of strength of crack directors section decreases with the increasing intensity of concrete and the distance between centers of adjacent crack directors, and that bilateral interval crack directors are more efficient in weakening the strength of section than unidirectional interval crack directors in the case of the same distance between adjacent crack director centers. A good design for crack directors of RCC arch dam is proposed via the rule.

关 键 词：roller compacted concrete （RCC） arch dam crack director equivalent strength fracture toughness size effect rule 

分 类 号：TV642.2[水利工程—水利水电工程] TU755.32[建筑科学—建筑技术科学]