The seperated pair of main ribs section was made up by bridge panel and girder, because its construction is convenient, used widely in the prestressing force concrete cable-stay bridge of large span.

• 回答：分离式双主肋截面是由桥面板与边主梁组合而成，由于其施工方便，在大跨度预应力混凝土斜拉桥中得到广泛应用。