梁跨

The results indicate that the vertical bending moment of girders, especially the girders of middle span, are influenced more obviously by coherence effect than by local site effect.───研究结果表明：相干效应对主梁纵向弯矩影响比较大，尤其是中跨部位；而局部场地效应相对影响较小。

With innovative structural characteristics and fine mechanical behavior, flat steel box girder is now the main structural style of large span bridges girders.───扁平钢箱梁具有新颖的结构特点和优良的受力性能，已成为现代大跨度桥梁加劲梁的主要结构形式。

Eccentric loadings will induce large torsional deformations for the girders of long-span Bridges, deteriorating the safety and comfort of moving vehicles of rail transit.───偏载作用下大跨度桥梁主梁易产生较大的扭转变形，这对轨道交通车辆运行的安全性和舒适性是不利的。