The dynamic response control for a steel frame structure with shape memory alloy(SMA)tendons under seismic ground motions was experimentally researched in the paper. A three-story steel frame structure model installed the diagonal SMA tendons was tested in a shaking table to validate the efficiency of the passive vibration control. The structural model was designed and tested in the cases of controlled and uncontrolled conditions,respectively. Considering the relatively great displacement between adjacent two stories, the diagonal SMA tendons were installed in the model with a mount of pre-stress and phase change stress. Two kinds of experimental cases were considered. The experimental results showed that the displacement,the story drift angle and acceleration for each story were significantly reduced compared with the non-controlled structure. Meanwhile,the dissipation effect of the SMA damper was well for the well-rounded areas of the hysteretic loops. The vibration responses of the steel frame structure installed the SMA tendons has been greatly reduced with great dissipation efficiency for the SMA dampers.%目的 在钢框架结构中加入形状记忆合金(SMA)拉索,以减小钢框架结构在地震荷载作用下的动力反应.方法 利用SMA斜拉索耗能器对三层钢框架结构模型的被动控制效果进行振动台试验.针对实际工程中钢框架结构在振动时,层间对角线两端的相对位移较大的特点,并考虑SMA拉索的初始预应变的影响,分别对钢框架结构进行有控制和无控制两种情况下的振动台试验.结果 与无控状态时相比,装有SMA耗能装置的钢框架结构,项层最大位移有明显减小,各层最大层间位移角也均大幅度减小,速度和加速度也明显降低,控制效果显著.同时,SMA滞回环饱满,耗能效果良好.结论 在地震作用下,安装有SMA的钢框架结构的振动反应得到了有效控制,SMA的耗能效果良好.
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