为了确定在曲线上所必需的钢轨强度以避免轨头的塑性压溃,需要考虑轴重的分布以及平均轴重。所需要的强度可以参考在直线上不出现塑性压溃的经验,并根据超载的概率来选定。因为钢轨的塑性压溃是损伤累积的结果,它并不要求工作应力不超过屈服极限,但是要求出现这种超应力小到足使钢轨由于其它原因,并不是塑性变形的原因而进行更换,亦即 In order to determine the required rail strength on the curve to avoid plastic crushing of the rail head, the distribution of shaft weight and average shaft weight need to be considered. The required strength can refer to the experience of plastic crush on the straight line does not appear, and according to the probability of overloading to choose. Since the plastic crush of the rail is the result of an accumulation of damage, it does not require that the working stress does not exceed the yield limit, but requires that such over-stress be small enough to cause the rail to be replaced for other reasons than plastic deformation which is