Structural Behaviors Research Of Extradosed Bridge With Corrugated Steel Webs Girder

Firstly, the developing situation at home and abroad and the structure characteristics of extrodosed bridge with Corrugated Steel Webs Girder was described in the thesis. Taking a constructed bridge as reference, a extrodosed bridge with corrugated steel webs with spans of (78+128+78)m had been designed. A combined finite element model involving beam element for the bridge is developed using Midas Civil, a general commercial finite element software. Stresses and deformations of the bridge are analyzed incrementally following every construction stages. According to the results, the time-dependent effects have a significant effect on the structural behaviors both in terms of stress and deformation at operational stage. Static load cases for analysis include live road loads, temperature variations, lateral sway force of train, uneven settlement force and combinations of such loads. The free vibration modes and frequencies of the bridge are computed using the subspace iteration method. Subsequently, comparedwith anequivalent PC box-girder, spectrum analysis and time history dynamic analysis are carried out and the results are compared. The Aim lies in discussing vibration characteristics of the PC box-girder bridge with corrugated steel webs.A finite element model involving plate element for part of the bridge is developed using Midas FEA, a general commercial finite element software,and emphasis on particular stress analysis of corrugated steel webs. Local,global, synthetic elastic shear buckling and unelastic shear buckling analysis and calculation method of corrugated steel webs were proposed.