摘要
借助对比试验,验证了混凝土中埋设的轻微锈蚀钢筋经表面抛光后,可满足里氏硬度计测量要求。然后,通过试验获得了历史建筑中常见的2种钢筋(圆肋和方钢)共计54根试件的里氏硬度值和相应的应力-应变曲线。从钢筋应力-应变曲线中得到屈服强度和抗拉强度。最后,经线性回归分析,提出了历史建筑中常用钢筋强度与里氏硬度的关系表达式,可用于历史建筑中钢筋的无损检测。
By means of comparative experiments, it was proved that the slight corroded steel rebars embedded in concrete,after polishing, could meet the measurement requirement of Leeb hardness meter. Then, total 54 specimens, including 2 types steel rebars with deformed surface were tested. The stress-strain curves and the corresponding hardness values for the steel rebars were obtained. As a result, the yield strength values and the ultimate strength values for steel rebars were derived from these curves. Finally, using linear regression analysis, mathematic expressions for the relationship between strength and hardness values with high accuracy for reinforcement steel rebars in historical buildings were proposed, which can be easily used in the inspection projects for historical buildings.
出处
《结构工程师》
2010年第1期108-112,共5页
Structural Engineers
基金
国家"十一五"科技支撑计划重大项目(2006BAJ03A07)
关键词
历史建筑
钢筋
硬度
强度
关系表达式
historical building, steel rebar, hardness, strength, relationship expression
