Steel used in a large number of bridge construction, greatly changed the structure of the bridge and the stress status, superiority triding now, good toughness, good force transmission effect, can effectively improve the earthquake resistance of the entire bridge. If encounter light after the earthquake, also can easily adjust the stress change and minimizes the adverse effects, it is very beneficial to prolong the service life of bridge, in short, in modern steel Bridges are playing a more and more important role, especially in the bridge the wide water channel, even more so, more show its superiority.