Abstract: Comparing with the estimating method of fatigue life and fatigue strength in the past, It is deduced that the formula of fatigue life of transversely tensioned prestressed concrete. To the problem that it is difficult for determining damaged fatigue lasting limit instantaneous value with no unit in the formula, m is determined, combining with mathematics and writing program, so the difficulty mentioned is avoided. And it is computed that the part of data from fatigue tests of transversely tensioned prestressed concrete, and reasonable result is gained. So correction of the formula is verified.

Key words: transversely tensioned prestressed concrete, fatigue life, degree of damage, cyclic life percent

摘要： 在研究传统的疲劳寿命及疲劳强度估算方法的基础上,应用Bui-Quoc.T非线性累积损伤法则,推导出横张预应力砼梁的疲劳寿命的计算公式,并对其中的受损态的无量纲疲劳持久限瞬时值难确定的问题,结合数学知识和利用计算机编程,求解出m.同时,通过实例计算结果与实验数据的比较,验证了公式的正确性.

关键词: 横张预应力砼, 疲劳寿命, 损伤度, 寿命循环分数