形状记忆合金-摩擦串联复合阻尼器对偏心结构振动控制的研究

采用自行研制的SMA-摩擦串联复合阻尼器控制偏心结构的平扭耦联振动。SMA-摩擦串联复合阻尼器能根据结构的地震响应自动调节耗能单元工作状态，且构造简单、经济实用。建立了SMA-摩擦串联复合阻尼器控制下偏心结构在双向水平地震作用下的运动方程，并编写程序计算结构的时程响应。以一六层剪切型偏心钢框架为例，计算结果表明：合理布置的阻尼器能有效抑制结构质心位移和质心层间位移，且对扭转振动的控制效果更佳；阻尼器对结构质心平移加速度的影响不大，但显著改变了扭转加速度。

Study on vibration control of eccentric structure using SMA-friction tandem damper

The self-made shape memory alloy (SMA)-friction tandem damper was used to control the translational-torsional coupling vibration of the eccentric structure. The SMA-friction tandem damper can adjust the working status of the energy consumption elements automatically according to the seismic responses of the structure, and has such advantages as simple configuration and economical application. The motion equation of the eccentric structure with the SMA-friction tandem damper subjected to the bidirectional horizontal seismic actions was set up, and the time history responses of the structure were computed in program. Taken a six-story shear-type eccentric steel frame for example, the numerical results show that the damper arranged on the structure reasonably can decrease the displacements and the inter-story displacements of the center of mass of the structure, and that the torsional vibrations are controlled better. It is also seen that the damper can control the translational accelerations of the center of mass of the structure slightly, but change the torsional accelerations greatly.