Effects Of Pile-Soil Interaction On Wind-Induced Vibration Control Of Pylon Tower With TMD

With the development of the modern traffic network, bridge has played the important role in the whole lifeline of the society. Recentiy, long-span cable-stayed bridge and suspension bridge have become the popular bridges with the development of bridge design and construction technology. The pylon tower of those bridges is sensitive to the wind in construction stage, as the structure of pylon tower has been changed taller and more flexible with.the advancement of material and construction technology,TMD is an effective control device to suspress the wind-induced vibration of the taller structures, such as pylon tower. However, the TMD system is sensitive to the frequency variation. At present, it is generally assumed that the base is fixed in the grond in the design of the system, without regarding to the pile-soli interaction. To make the system effectiveness, it is necessary to analyze the effect of the pile-soil-structure interaction to the performance of the TMD system.This paper investigates the wind-induced vibration responses of the pylon tower of the Third Nanjing Yangtse Cable-stayed Bridge, and the effects of pile-soil interaction on wind-induced vibration control of the structure with TMD system.The following items will be investigated:1. The ANSYS finite element code is utilized for establishing the pylon tower model with bottom fixed in the ground. The wind-induced vibration response of the pylon tower and the effects of the wind-induced vibration of the pylon tower are analyzed.2. The TMD control system of the Third Nanjing Yangtse Bridge is designed. The performance of the TMD system for suppressing the wind-induced vibration of the pylon tower is also investigated.3. The pile-soil-tower interaction model with the Concentration Mass Method is established. The wind-induced vibration of the structural considering the pile-soil-tower interaction is also conducted.