Sammendrag
We employed maturely developed methods and software, RIFLEX/SIMO/SIMA to look into the feasibilities of different floating tunnel/bridge design concepts. The global hydroelastic responses of two concepts, i.e. tether/pontoon supported hybrid tunnel concept and floating foundation supported girder concept and have been investigated. The distributions of maximum values of the deflection, bending moment and stress along the bridges under different sea conditions are presented.