摘要
为了更加准确地检测热轧带肋钢筋的抗拉强度,避免受到外界众多因素的干扰,在检测时有必要给出钢筋的不确定报告,此次研究以实际项目所用的18mm直径热轧带肋钢筋为例,建立数学分析模型,给出了对钢筋抗拉强度检测结果造成影响不确定度分量,并计算了分量的贡献度,最后得出扩展不确定度u为5.68MPa,并将钢筋抗拉强度不确定度报告表示成:Rm=(618±5.68)MPa,提高了钢筋强度检测的精准度,为相关工程提供借鉴。
In order to detect the tensile strength of hot-rolled ribbed steel bars more accurately and avoid the interference of many external factors,it is necessary to give an uncertainty report of the steel bars during the detection.This study takes the 18mm diameter hot-rolled ribbed steel bars used in the actual project as an example,esatblishes a mathematical analysis model,gives the uncertainty ocmponents of the impact on the tensile strength test results of the steel barsa,nd calculates the contribution of the components,Finally,itis concluded that the expanded uncertainty u is 5.68 MPa,and the uncertainty reporto f tensile strength of reinforcement is expressed as Rm(=618±5.68)MPa,which improves the accuracy of reinforcement strength detection and provides guidance and reference for relevant projects.
作者
张强
刘次啟
杨佳成
Zhang Qiang;Liu Ciqi;Yang Jiacheng(Guizhou Building Materials Product Quality Inspection and Testing Institute,Guiyang,Guizhou 550016;National Quality Supervision and Inspection Center for New Wall Materials,Guiyang,Guizhou 550016;National Green Building Materials Quality Supervision and Inspection Center,Guiyang,Guizhou 550016)
出处
《江西建材》
2023年第3期106-108,共3页
Jiangxi Building Materials
关键词
热轧带肋钢筋
抗拉强度
不确定报告
数学分析模型
Hot rolled ribbed steel bar
Tensile strength
Uncertainty report
Mathematical analysis model
