SATMD与粘弹性阻尼器相结合控制体系的地震反应分析

Seismic analysis of hybrid control system combined (SATMD) with viscoelastic damper

混合控制体系是结构控制领域里的一种新型高效控制体系,它能以较低的能量输入和简单经济的消能元件,取得较好的控震和减震效果.首先研制开发了一种模糊控制器,介绍了其设计原理和方法,通过在结构顶层安装被动调谐质量阻尼器(PTMD),并在控制系统中引入模糊控制器,可实现刚度和阻尼控制档位的自动调节和调谐的半主动化.同时,在结构其他各层进行粘弹性阻尼器的优化设置,可使结构体系达到最优控制要求.还提出了半主动调谐质量阻尼器(SATMD)与粘弹性阻尼器相结合的混合控制实用设计方法,并编制电算程序进行了地震作用下的时程分析,证实了该控制体系在降低结构地震反应方面的有效性.

Hybrid control system is a kind of novel and efficient system in structural control area. Through lower energy input and the use of simple energy dissipation unit, proper effect of vibration controlling and reducing can be achieved in the system. In this paper, a fuzzy controller was developed and its design principle and methodology are introduced. By installing PTMD on the top of the building and using fuzzy controller in the control system, the set point of stiffness and damping can be adjusted automatically and tuning can be accomplished semi actively. Simultaneously, optimal control can be achieved by optimizing the installation of viscoelastic damper on the other floors of the building. Also, practical design method for hybrid control is proposed to combine SATMD with viscoelastic damper. Time history analyses are conducted to investigate the effectiveness of the control system in reducing the seismic responses of structure.