Analysis On Structural Seismic Reduction With Lead-Rubber Bearings

All along, earthquake is one of the most serious and affected natural disasters for human's production and life. At the same time, high-rise buildings attract more and more people's attention. They become to be the landmark of many large cities because of their beautiful appearance and smaller area. However, the higher the structures are, the bigger the swinging scope is. So the future structures need more strict anti-seismic conditions. From the previous experiences during designing, we learned that increasing the rigidity of structures of their own only will greatly increase the project cost. So the methods to control structural vibrations come into being and more and more usually used in structural design. Lead-rubber bearing is one of the commonly used methods to control vibrations, which with simple structure, clear principle and significantly affection. In this paper, the main works are,First of all, the paper discussed the historical progresses and the future trends of reducing the structural vibration and energy. The seismic isolation technology and the calculation methods were detailed analysis.Secondly, the paper established three finite element models of frame-tube structure with the same plane and different heights. Adopt the lead-rubber bearings to be the seismic isolation device, and calculate the earthquake response of the structures with isolation bearings or not. The result is, enough lead-rubber bearings can reduce the seismic responses effectively while the structure at a certain height.Finally, the paper established the ANSYS model of the Guangzhou TV Tower and calculated its seismic responses with isolation bearings or not. The result is, lead-rubber bearings can't good meet demands of reducing the seismic responses of Guangzhou TV Tower. In this paper, the writer recommends the method to reduce the seismic reduction of Guangzhou TV Tower is to use the hybrid control approach.