Abstract
It is found that the brittle fracture characteristics of steel bars for concrete reinforcement have close correlations with Charpy impact characteristics, then the Charpy impact tests are useful for the brittle fracture evaluation of steel bars. In this paper, the Charpy impact tests of the various materials of steel bars, including blast furnace bars and electric furnace bars, are conducted. Moreover, chemical components and microstructures of the bars are investigated. Then the effects of the various factors on Charpy impact characteristics are investigated by the multiple linear regression. Finally, estimation methods of Charpy impact characteristics of steel bars are proposed.
