粘滞流体变阻尼半主动控制器对结构抗震控制的试验研究

Experimental Study on Structures with Semi-Active Fluid Dampers

设计了一种粘滞流体变阻尼半主动控制器 ,对该阻尼器的力学性能进行了试验研究。通过试验 ,建立了该阻尼器的力学模型。将该阻尼器安装在五层钢框架模型上 ,进行了模拟地震振动台试验。试验中分别采用了不同的控制算法 ,并输入了不同的地震波 ,试验结果证明了该种阻尼器可以有效地控制结构的地震反应。最后 ,对该种粘滞阻尼器控制结构的地震反应进行了仿真分析。

A kind of fluid viscous semi active damper and experimental results of the performance of the controller of the semi active damper are presented. The relationships between viscous coefficient and voltage or exciting frequency are investigated. The linear viscous model and a model with frequency and votage to describe the relationship between the coefficient and voltage are suggested. A 1/4 scale five story steel structure with and without the semi active damper is tested using a shaking table under El centro and Tianjin Earthquake ground excitations. The control laws of Hrovat and ON/OFF algorithm are used in the tests. The shaking table test results indicates that the semi active damper designed in this work reduces earthquake responses significantly. The analysis of earthquake responses of structures with the semi active dampers is also carried out.