开口纵肋的正交异性钢桥面板疲劳试验研究

Fatigue Tests of Orthotropic Steel Bridge Decks with Open Shaped Longitudinal Ribs

对由盖板、５个角钢纵肋和２个横梁组成的２个钢桥面板模型进行了疲劳试验研究。在该模型以前所进行的静力试验和有限元分析基础上，讨论了横梁腹板孔边缘、纵肋与横梁焊接以及纵肋与盖板焊接三个部位的疲劳性能。对照中国钢结构设计规范ＧＢＪ１７—８８中的疲劳分类，提出了这些部位适用的疲劳强度。

In this paper, fatigue tests are carried out on two models of orthotropic steel bridge decks which are composed of one deck plate, five L section longitudinal ribs and two cross beams. The fatigue behaviour is discussed at three loactions such as the edge of the cut out in the cross beam, the longitudinal rib to cross beam joint and the longitudinal rib to deck plate joint, based on the static test and the finite element analysis of the model carried out before. Their suitable fatigue strength is proposed, compared with the fatigue classifications in the design standard for steel structures of China.