使用摩擦夹具对颈缩状的棱柱体试件施以拉力荷载进行了拉力疲劳试验。试验结果表明,素混凝土在小于2×10~6次循环的拉力疲劳中不显示疲劳极限,其2×10~6次的疲劳强度为静拉力强度的72.8％。此拉力疲劳强度比某些研究人员得出的压力和弯曲疲劳强度高得多。该试验结果也表明,在拉力循环荷载作用下,应力——应变关系近乎线性.其斜率不随循环次数而改变。 Tensile fatigue tests were performed on the necked prismatic specimens by using a friction fixture. The test results show that the plain concrete does not show the fatigue limit under the tensile fatigue of less than 2 × 10 ~ 6 cycles, and the fatigue strength of 2 × 10 ~ 6 times is 72.8% of the static tensile strength. This tensile fatigue strength is much higher than the pressure and flexural fatigue obtained by some researchers. The test results also show that the stress-strain relationship is nearly linear under the cyclic load of tension, and the slope does not change with the number of cycles.