钢筋力学性能测量的不确定度评定

Measurement Uncertainty of mechanical properties of steel bar

通过对直径16mm的热轧带肋钢筋进行一系列力学性能试验,得到钢筋的抗拉强度、屈服强度和断后伸长率试验结果。接着引入试验重复性、拉伸速率、力值测量、尺寸测量、试验机数据采集系统、数值修约这几个主要的不确定度分量来评定钢筋的抗拉强度、屈服强度和断后伸长率的测量不确定度。

In order to get the tensile strength,yield strength and elongation after fracture,we use series of hot-rolled ribbed steel bars of 16mm diameter in mechanical testing.Then many major uncertainty components like the test repeatability,stretching rate,the measuring of force,measurement of size,data acquisition system of the testing machine and numerical rounding off are introduced into evaluate the steel measurement uncertainty of tensile strength,yield strength and elongation after fracture.