Fragility curves of viaduct structure were developed by capacity spectrum method and nonlinear dynamic analysis method respectively.

Introduced hereby is a simple steel cable rack crossing the river, which is a system of space under tension and compression module, with clear loading and relative independence from the surroundings.

A preliminary designing of a steel structural trestle on Yanan Road is presented and a general evaluation of the costs and maintenance periods of steel structural trestles with different spans, the influence of construction process exerting on the traffic and the influence of the traffic noises on the environment is given in this paper.