Static And Dynamic Behavior Analysis Of Unban Light Rail Cable-Stayed Bridge

Firstly, the background and significance of unban light rail cable-stayed bridge are summarized in this thesis. Then based on the CaiJia JiaLing River Bridge which is a cable-stayed bridge with twin pylons, three span and double cable planes, the bridge model is established and calculation is taken by use of finite element software Midas/Civil.The following three aspects are calculated and analyzed in this thesis:(1) Static analysis:the structural internal force, stress and deformation caused by construction loads in the construction phase are calculated and analyzed, as well as the the structural internal force, stress and deformation during the operational phase under the action of dead load, live load, temperature load, wind load, braking load and other loads. The strength, rigidity and load-bearing capacity of the bridge structure is verified and checked.(2) Dynamic analysis:the subspace iteration method is used to calculate the bridge vibration frequencies and modes of participation. And the response spectrum method is applied to analyze the response of bridge under earthquake. Similarly the seismic capacity of the bridge is verified.(3) Stability analysis:The stability analysis is applied to operational phase, the stage of only pylons, the half maximum cantilever stage and the maximum phase. The stability of bridge in such stages is verified.Through the structural analysis of this unban light cable-stayed bridge, the static and dynamic structural behaviors of the bridge are summed up. Some suggestions for design is putted forward.