Response Spectrum Research And Parameters Analysis On Sliding Base Isolation System

Sliding isoltation system is used earlier in anti-seismic structure, It can extend natural period of structure and reduce earthquake response by use of sliding story which separate base and top structure in the earthquake .It show obviously effect by change traditionally active control model that improving stiffness and strength of struacture to reduce earthquake response. But the research on sliding system is still weak now, and many problems have not been real resolved, which making it developed slowly in the system of promotion by the earthquake.Based on the previous study, this paper takes work on some research of sliding base isolation system and make the following conclusions:First, after read a lot of Chinese and foreign literature ,make a series of research work on the system of sliding, detailed on the sliding system of the status and the current key issues facing. And determined the main work of the papers.Then, the earthquake ground motion in accordance with the power spectrum, using the equivalent linear method to obtain the rigid structure of friction in the basement isolation under earthquake response of the biggest slip square reaction function, and dimensionless.Establish the parameters Analysis of the objective function, use matlab programming analysis. Analysis showed that the slipment of isolation structural not only according to the stiffness for limit displaysment restrainer, but also ratio of upper structure total mass and isolation system. There is an optimal value.On this basis, the choice of a optimize the quality ratio, the establishment of a dual-degree of freedom isolation system ,to choose the correct slip friction model. Based on the momentum kinematics established a sliping response spectrum dynamic equation. Use advanced engineering tools—simulink and stateflow. produced a slip response spectrum analysis of the simulation model. Solving the sliding system of a series of response spectrum. Finally, lotus root for sliding system, and make a example for use the average response spectrum which was maked in front of chapters, and compared with standardize non-isolated response spectrum, then make the conclusions is that sliding response spectrum can be applicated in the engineering.