SMA复合支座与磁流变阻尼器的双重隔震体系减震效果分析

为了进一步改善SMA复合支座在强震下的隔震效果,特别是当复合支座的水平剪切变形较大时,将SMA复合支座与磁流变阻尼器相结合,建立一种基于SMA复合支座与磁流变阻尼器的双重隔震体系及其力学模型,并与单纯的SMA复合支座隔震进行对比。仿真分析表明,该体系不仅能够大幅度地减小隔震层的水平侧移,有效地保护隔震装置,而且能使上部结构的层间位移与加速度反应得到有效的控制,从而提高隔震建筑的减震效果和可靠性。

Seismic response reduction of the hybrid seismic isolation system based on the SMA rubber bearing combined with magneto rheological damper

The hybrid seismic isolation system,consisting of the SMA strands-laminate rubber bearing combined with magneto rheological damper,was explored,for the sake of improving seismic isolation effect of the SMA strands-laminate rubber bearing under great earthquake,especially when level shear deformation of SMA rubber bearing is bigger.So does its mechanical model.In this paper,we compare the SMA strands-laminate rubber bearing with the hybrid seismic isolation system.Simulation analysis results indicate that the hybrid seismic isolation system is able to achieve both low inter-story drift and acceleration and at the same lime,limit the base displacement.The security of isolated structure was improved largely.