Abstract
The purpose of this paper is to describe the method of three dimensional analysis of girder bridges with arbitrary configuration, and to present the response of straight, curved or skewed composite I-girder bridges for design loads. The method is based on finite element scheme in which floor slab is idealized in bending plate elements, main girders are in beam elements and eccentric connections between floor slab and main girders are treated by that beam elements consider off-set beam elements. Applying this method to analyze straight, curved or skewed composite I-girder bridges, actual behaviours of those are investigated. Resulting deformations and stresses are compared with that obtained from the grillage analysis which has been used in the ordinary design procedures, while effects of lateral bracing on the response by primary loads are also discussed.
