| The Tianjin CiHai Bridge is a novel construction for it constructs a Giant Wheel together with the bridge. The complexity of the structure may result in complicated distribution of the inertial forces. Therefore, not only the requirements of structural stiffness, strength and stability must be examined, but also the deformation and amenity of the structure should be checked. So it is necessary to perform static and dynamic analysis for Giant Wheel structure.First, the finite element model of Giant Wheel structure of Tianjin CiHai Bridge is built in ANSYS software. The static loading is determined according to the condition of the design sheets and the static analysis is performed. By application of the harmony superstition method combing with FFT technology, procedure of wind speed at the selected nodes is simulated and the equivalent wind load is generated according to the wind speed procedures, then the dynamic analysis of the Giant Wheel structure subjected to wind load is conducted. Finally, according to the soil condition of the construction area, appropriate seismic waves are selected to excite the Giant Wheel structure, and the time-history seismic responses of the structure are calculated and compare with the results obtained from response spectrum method. The simulation results demonstrate the safety and amenity of the Giant Wheel structure under wind and earthquake excitations, and provide vibrant parameters for structural design and construction.Some main conclusions are drawn as follows: The simulation results show that the calculation efficiency can be improved by using equivalent wind load for dynamic analysis, while the peak responses of the structure are smaller than those obtained from static wind load case. The peek acceleration of Giant Wheel under the wind-induced vibration can meet the requirement of amenity. The peak responses obtained from time-history analysis and response spectrum method are similar, which also verifies the correctness of the two methods.
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