粘弹性消能结构的抗震设计反应谱及其工程应用

ANTI-SEISMIC DESIGN RESPONSE SPRECTRA AND APPLICATION TO ENGINEERING STRUCTURES WITH VISCO-ELASTIC DAMPERS

探讨了结构阻尼比、刚度的变化对地震反应的影响,研究表明,阻尼增加对结构的动力反应有明显的减小效果,刚度增加虽能有效地控制结构的位移反应,但不能有效地抑制结构的加速度反应;在总结分析已有研究成果的基础上,结合抗震规范,给出了安装粘弹性阻尼器后结构的抗震设计反应谱;最后,阐述了粘弹性消能结构的减震设计方法和步骤,给出了实际工程结构安装粘弹性阻尼器后的地震反应计算结果,计算表明,层间位移和加速度反应较原结构减小明显。

Effects of varying damping ratio and stiffness of engineering structures on their seismic responses are studied.The results indicate that increasing damping can effectively reduce structural dynamic responses;enhancing stiffness can contrlo structural displacement respose,but it can not suppress structural acceleration response.Based on the research results having been obtained and combined with the anti-seismic criteria,the anti-seismic design response spectra of engineering structures with visco-elastic dampers are given out.The anti-seismic design of visco-elastic dampers and the corresponding procdures are presented,the simulations for the seismic response of the real structures with visco-elastic dampers are given and they show that the story displacements and accelerations of the stractare with visco-elastic dampers are smaller obviously than those without dampers.