框架结构抗震、隔震和减振控制的对比分析

运用有限元分析软件MIDAS／GEN建立典型三维多层钢框架模型，对设置铅芯橡胶支座基础隔震结构和粘弹性阻尼器结构分别进行双向水平地震作用下非线性时程分析。与传统抗震方法比较，讨论隔震结构和黏弹性阻尼结构的减震效果。在力学性质方面，结构在隔震和设置黏弹性阻尼器时，其顶层加速度峰值、顶层位移、相对位移、基底剪力等均有较大幅度地降低，表现出良好的隔震和减震效果。在经济性方面，隔震结构和黏弹性阻尼结构能够通过减小构件截面，减轻结构重量，达到经济的目的。在抗震可靠度方面，基础隔震结构更能表现出优越性。

Comparative Analysis in Anti-seismic,Seismic Base-isolation and Controling of Vibration reduction of Frame Stucture

A typical three-dimensional multi-storey steel frame model is established by the finite element analysis software MIDAS / GEN which is also used to analyze non-linear time history analysis of base-isolated building with lead laminated rubber bearings and structure with viscoelastic damper under horizontal seismic two-way. Comparing with traditional seismic methods, the base-isolated structure and the viscoelastic structure are discussed on damping effects. In mechanical properties, the peak value of the acceleration and the displacement at the top floor , the relative displacement and the base shear of the isolated structure and VED structure are both reduced remarkably and aseismic behaviors are excellent. In the economy, the isolation structure and the viscoelastic structure are able to reduce the weight of structural, to achieve economic objectives by reducing member＇s cross-section.In the seismic reliability, the base-isolated structure shows it＇s superiority.