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。
2
As the rise of the production efficiency and the emergence of the large loadings, the installations of equipments will need large span gantry cranes.