斜拉索足尺疲劳试验的关键问题

随着斜拉桥建设的增多，斜拉索的疲劳问题越来越突出。作为研究斜拉索疲劳性能的主要手段，拉索足尺疲劳试验因其规模大、成本高等原因，在世界范围尤其是国内所进行的次数并不多。在研究国内外相关文献的基础上，提出了斜拉索疲劳的安全度准则及试验抽样方法，总结了疲劳试验参数的确定方法并比较了国内外规范的相关规定，研究并总结了目前为止国内外主要的拉索足尺疲劳试验，并介绍了疲劳试验常用的加载方式。

Key Problems of Full scale Fatigue Tests of Stayed cables

With the increase of the cable stayed bridge construction, stayed cable fatigue is becoming more prominent. As the primary means to study the fatigue properties of the stayed cable, the full scale fatigue test is conducted rarely, especially inside China, because of its huge size and high cost. On the basis of relevant literature, the paper summarizes the fatigue test parameter determining methods and compares the relevant provisions of domestic and international codes, and introduces the main full scale fatigue tests conducted so far.