Effect of wind load on stay-cables across structure

The dynamic and static mechanical performances of the stay-cables structure across Mulong River under the effect of wind load were analyzed using the finite element method.The static analysis results indicate that the maximum deformation and the maximum stress vary a little with wind-force when the wind-force is smaller than grade 3,but they increase significantly with wind-force when the wind force is larger than the grade 3.Under dynamic wind load,the front 10 order modes and frequencies of the structure are obtained by modal analysis.Under the effect of 8 grade dynamic wind force,the time history responses of the displacement and pulling stress of two important nodes located in the middle of the bridge and at its end are researched,and the stress and displacement distributions of the whole bridge in a moment are also analyzed.Finally,the relationships between the maximum deformation and the maximum stress and the dynamic wind-force are obtained,they are similar to those under static wind load,but when the wind-force is larger than grade 3,the maximum deformation and the maximum stress are almost two times than those under the static wind load.