To clarify the stress behaviors at a rib-to-deck (RD) double-sided weld detail, controlled truck loading tests were first performed on a newly built long-span cable-stayed bridge with orthotropic steel decks (OSDs). A specifically designed truck loading scheme were employed to simultaneously obtain stress records at the outside weld of the RD detail. A solid FEM panel model was established to determine the stress at the RD double-sided weld detail. It was found that the stress at the detail under wheel loads was dominated by significant local effects, where the apparent stress at the details was produced if their distances to the wheel center were not larger than the rib spacing in the bridge transverse direction or the floorbeam spacing in the bridge longitudinal direction. In addition, each axle could produce an individual stress cycle only when the detail was underneath the deck plate covered by the wheel load distribution width. The FEM results indicated that among the three typically transverse loading locations, the riding-rib-wall loading was the most critical, and generated the highest stress range at the RD double-sided weld detail. The stress range at the outside weld of the detail was higher than that of the inner weld, hence stress measurements outside the detail could conservatively be used for evaluating the fatigue of existing OSD bridges that use the RD double-sided weld detail. The results also provided strong support for the FEM analysis of the OSD using a panel model loaded with a one-sided twin axle.

为了阐明肋到桥面 (RD) 双面焊缝细节处的应力行为，首先在新建的具有正交异性钢桥面 (OSD) 的大跨度斜拉桥上进行了受控卡车装载试验。采用专门设计的卡车装载方案同时获得 RD 细部外部焊缝处的应力记录。建立了实体 FEM 面板模型以确定 RD 双面焊缝细节处的应力。研究发现，车轮载荷作用下细部处的应力主要受局部显着影响，如果细部距车轮中心的距离不大于桥梁横向或地板梁的肋间距，则细部处会产生表观应力。桥梁纵向间距。此外，只有当细部位于车轮载荷分布宽度覆盖的甲板下方时，每个车轴才能产生单独的应力循环。FEM 结果表明，在三个典型的横向加载位置中，骑肋壁加载是最关键的，并且在 RD 双面焊缝细节处产生最高的应力范围。细部外侧焊缝处的应力范围高于内侧焊缝处的应力范围，因此细部外侧的应力测量可以保守地用于评估使用 RD 双面焊缝细部的现有 OSD 桥梁的疲劳。结果还为使用加载单侧双轴的面板模型对 OSD 进行 FEM 分析提供了强有力的支持。FEM 结果表明，在三个典型的横向加载位置中，骑肋壁加载是最关键的，并且在 RD 双面焊缝细节处产生最高的应力范围。细部外侧焊缝处的应力范围高于内侧焊缝处的应力范围，因此细部外侧的应力测量可以保守地用于评估使用 RD 双面焊缝细部的现有 OSD 桥梁的疲劳。结果还为使用加载单侧双轴的面板模型对 OSD 进行 FEM 分析提供了强有力的支持。FEM 结果表明，在三个典型的横向加载位置中，骑肋壁加载是最关键的，并且在 RD 双面焊缝细节处产生最高的应力范围。细部外侧焊缝处的应力范围高于内侧焊缝处的应力范围，因此细部外侧的应力测量可以保守地用于评估使用 RD 双面焊缝细部的现有 OSD 桥梁的疲劳。结果还为使用加载单侧双轴的面板模型对 OSD 进行 FEM 分析提供了强有力的支持。细部外侧焊缝处的应力范围高于内侧焊缝处的应力范围，因此细部外侧的应力测量可以保守地用于评估使用 RD 双面焊缝细部的现有 OSD 桥梁的疲劳。结果还为使用加载单侧双轴的面板模型对 OSD 进行 FEM 分析提供了强有力的支持。细部外侧焊缝处的应力范围高于内侧焊缝处的应力范围，因此细部外侧的应力测量可以保守地用于评估使用 RD 双面焊缝细部的现有 OSD 桥梁的疲劳。结果还为使用加载单侧双轴的面板模型对 OSD 进行 FEM 分析提供了强有力的支持。