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Background and activities

Dynamic modelling and analysis of long span cable-supported bridges with floating towers subjected to wind and wave loading

The Norwegian Public Roads Administration (NPRA) is running a project “Ferry free coastal route E39”, see here for more information. Some of the straits are up to 5 kilometers wide and 1.5 kilometers deep and will call for significant extension of present bridge technology. The installations have to resist extreme environmental loads and accidental actions with acceptable safety levels. Floating suspension bridge is one of the proposed solutions, a combination of offshore ocean engineering and bridge engineering. This new concept of bridge represents new challenges when it comes to prediction of the dynamic behavior. There is a complex interaction between the moorings and the floating towers and the towers and the bridge deck. Hydrodynamic and aerodynamic modelling is a crucial issue.

 

Main objectives 

- develop a dynamic model of such bridges including fluid-structure interaction where hydroelastic, aeroelastic and nonlinear structural behavior are taken into account

- apply this model in uncertainty analysis and predict extreme values of the dynamic response when the structure is subjected to harsh environmental conditions

Research group

Structural Dynamics

Supervisors

Ole Øiseth

Torgeir Moan