Cable-deck dynamic interactions at the International Guadiana Bridge

The cables of the International Guadiana Bridge experience, very often, from moderate to large amplitude vibrations in different wind conditions. The study concerns the description of the amplitude levels for which nonlinear dynamic interactions between deck and cables could be expected due to the presence of bridge global modes close to integer ratios with cable local modes. Through a nonlinear cable-stayed beam model the planar modal interaction between two global modes and a local one in the ratio 1:2:2 is fully described