采用引伸计和手动两种方法测量热轧带肋钢筋的最大力总延伸率,得出两种方法测得数据的差异,并分析了差异产生的原因。结合热轧带肋钢筋和金属材料室温拉伸试验方法相关标准的执行,提出了准确测量热轧带肋钢筋的最大力总延伸率的合理化建议。结果表明:在拉伸力最大且同等变形条件下进行测量时,引伸计测量与手动方法测量的最大力总延伸率仅相差0.34%,数值比较接近。

The maximum force total elongation of hot rolled ribbed steel bars was measured by extensometer and manual methods. The difference between the two methods was obtained, and the causes of the difference were analyzed. Combined with the implementation of the relevant standards for the tensile test method of hot rolled ribbed bars and metal materials at room temperature, reasonable suggestions for accurately measuring the maximum total force elongation of hot rolled ribbed bars were put forward. The results show that when the tensile force was the largest and the deformation was the same, the maximum force total elongation measured by extensometer was only 0. 34% different from that measured by manual method, and the value was relatively close.