中文摘要：

试验研究了冻融作用下预应力混凝土结构疲劳的耐久性，提出了冻融作用下预应力混凝土结构疲劳的可靠度概率计算方法。研究表明：低次数的冻融对预应力疲劳并无很大影响，但预应力的大小会对结构可靠度的数值有较大影响。建立冻融作用下预应力混凝土结构疲劳破坏可靠度的公式，可以获得在实际的冻融加疲劳的工况下的可靠度。

英文摘要：

Firstly,this paper studies on the fatigue durability of pre-stressed concrete after freezing-thawing damnification and the reliability probability computing method is proposed.The results show that low freezing-thawing times can not influence the fatigue capability,but the pre-stressed degree has much more influence on fatigue reliability.Under freezing-thawing damnification, the formula is established and it can obtain the reliability realistic cases.