| This thesis focuses on suspended stiffening steel truss bridge, containing the performance of static and dynamic, stability. Firstly, the author presents process of building up detailed integrated finite element models for Dongjiang Bridge by MIDAS/CIVIL, a large-scale FEM soft wares. The structural behavior under loads of construction stages and completed bridge stage are analyzed. Harmonized force among the three steel trusses contributed by supports adjustment is emphasized, by the means of compared analysis of adjusting supports or not. After calculating three schemes of different connecting order of floor system and longitudinal horizontal brace, this thesis discusses the influence of spatial behavior of structure upon horizontal buckling of crossbeams, and finds a relative valuable technique to solve the problem. Then, seismic responses of this bridge are studied by the response spectrum analysis, and the elasticity stabilities of it are also calculated. Therefore, the performance of static and dynamic, stability and analysis method of suspended stiffening steel truss bridge are understood roundly.
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