基底受地震激励时结构的调谐减震控制

Analysis of Structure with Tuned Mass Damper under Earthquake

对地震激励下的结构的调谐减震控制 (TMD)进行分析 ,考虑了土体与结构的共同作用 ,通过拉普拉斯变换 ,采用传递函数的解法 ,在不同参数情况下 ,探讨了有、无TMD结构体系的主结构位移方差随主结构一阶固有频率的变化规律。分析比较表明 :调谐减震体系对低频柔性结构有明显的减震效果 ;当场地卓越频率与主结构频率相近时 ,非调谐的传统结构发生共振反应 ,而调谐结构减震效果最为明显。

The analysis of vibration response of structure with TMD is carried out under earthquake ,considering the ground-structure interaction. The varying rule of square difference of displacement of structure with the TMD on or off by changing the first inherent frequency is also presented .It has been proved by comparing and analyzing that a TMDstructure with optimum parameters can efficiently reduce the vibration of structure under strong wind and earthquake,when the main frequency of the ground motion is within the range of TMD vibration reducing frequency.