【摘要】 为提高热轧钢筋断后伸长率的检验工作效率,在分析原始标距与断后伸长率关系理论模型的基础上选取有代表性的4组试样进行试验,并对试验结果以及相关误差进行汇总分析。结果表明,对于直径14mm及以上的热轧钢筋,原始标距在5d±10mm范围内选取时,对断后伸长率的结果基本没有影响。为便于热轧钢筋的合格性检验,宜在相关标准中对原始标距设定适宜的取值范围。更多还原

【Abstract】 To improve the work efficiency of hot-rolled bars percentage elongation after fracture test with premise of scientific and accurate,on the basis of analyzing the theoretical model of the relationship between the original gauge length and the percentage elongation after fracture,selected 4 representative group of samples for testing,collected and analyzed the test results and related deviations. The results showed that the percentage elongation after fracture of hot-rolled bar which diameter was 14 mm and above has virtually no effect while the original gauge length was selected in the range of 5 d ± 10 mm. To facilitate the hot-rolled bars qualification test,the suitable range should be set in related standard for original gauge length.更多还原