In order to study the fatigue performance of orthotropic steel bridge decks,a full-scale segmental fatigue test model was designed based on the research results of the new structural details welding process and reasonable structural parameters.Through the full-scale model tests,the actual fatigue resistance of various fatigue vulnerable details under different welding processes was determined.The covering layer serves as the driving functional layer upon the steel bridge,directly supporting the wheel load.Two paving structures were designed including cork asphalt pavement and poured asphalt pavement.They were applied to simulate the synergistic stress system of the paving layer and orthogonal and anisotropic steel bridge slabs of Wuhan Jianghan Seventh Bridge,considering the effects of temperature.The results show that because of the synergistic effect of pavement layers and steel bridge decks,the stress amplitude of structural details of U-ribs and top plates of steel bridge decks with pavement layers is significantly lower than those without pavement layers.The stress amplitude increases with the temperature of the pavement layer.
关键词
正交异性钢桥面板/疲劳性能/足尺节段模型试验/U肋/铺装层/温度
Key words
orthotropic steel bridge deck/fatigue performance/full-scale segmental model test/U-rib/pavement layer/temperature
维普
万方数据