钢筋抗拉强度测量结果不确定度的评定

根据JJF1059—1999《测量不确定度评定与表示》，对φ28mm热轧螺纹钢筋进行抗拉强度测试，并对抗拉强度的不确定度进行了评定。结果表明，本试验条件下的抗拉强度测量结果的不确定度为5Mpa，相对扩展不确定度为O．9%.

According to the requirents of standard JJF 1059-1999 ＂Evaluation and Expression of Uncertainty in Measurement＂ , the tensile strength of the φ 28mm hot-rolled steel rebar has been tested.The uncertainty of measurements of the tensile strength have been evaluated. The results show that, under the test condition,the uncertainty of tensile strength is 5 Mpa, the relative uncertainty is 0.9%.