In this paper , another three control systems were also discussed . they are base - isolation system ( bi ) , base - isolation & passive variable stiffness system ( bi & pvs ) and base - isolation & passive variable damping system ( bi & pvd ) . these control effectiveness of four control systems are all computed and compared 分析表明, _上述四种不同的控制体系中,基底隔震上部半主动变刚度变阻尼控制体系( bl & avsd )能稳定有效地减少上部结构层间位移,具有较好的减振效果。
( 3 ) the sma incorporated friction damper is applied to long - span canopy roof structures to investigate its vibration control performance . the control effectiveness is analyzed with inputting three - dimensional el - centro earthquake waves in small , medium and large seismic intensity . the results show that control performance of the sma incorporated friction damper is superior to that of both the friction damper and the sma damper 通过输入三向el - centro地震波,分别研究了结构在小震、中震和大震情况下的减振性能,并与结构在纯摩擦阻尼器、仅sma阻尼器的控制效果进行了对比分析,表明sma复合摩擦阻尼器具有卓越的耗能减振性能。