具有调谐惯容阻尼器的建筑结构减震设计

为提升传统调谐质量阻尼器(tuned mass damper,简称TMD)应用的方便性,提出利用调谐惯容阻尼器(tuned inerter damper,简称TID)对结构进行减震控制,推导了基底白噪声激励下建筑结构的TID最优阻尼参数和最优刚度参数的解析式以及无阻尼的位移方差解析式。分析表明,TID最优参数与其安装的相邻楼层振型坐标差的平方有关,该值越大,控制效果越好。通过3个均匀结构和1个12层的非均匀结构模型分析表明:TID对中低层结构的控制效果较好,且对高阶振型控制优势明显;TID-TMD混合控制方案在地震作用下的控制效果更明显,优于TID,且总体上与多重TMD控制效果相近;TID-TMD仅需在顶层安装TMD,其余楼层安装TID,减少了多重TMD控制高阶振型带来的空间占据、安装不便、质量过大等问题。

The Seismic Mitigation Design of Tuned Inerter Damper for Building Structure

To improve the convenience of the traditional tuned mass damper(TMD), tuned inerter damper (TID) is proposed to mitigate the vibration of the structure subjected to ground white noise. The corresponding optimal damping parameter, optimal stiffness parameter and displacement variance analytical expression are deduced. The formulas show that the optimum parameters relate to the square of the mode difference between adjacent floors. The larger difference, the better control effectiveness. Then, TID is applied on three uniform structure and one non-uniform structure. The results indicate that TID performs well on the median and low buildings and it is also suitable for high mode control. TID-TMD works much better than TID in seismic reduction and when the structure is subjected to earthquakes exercitation, but they are neck and neck as a whole. So, TMD s only installed at the top floor with TID set up other floors, which solves the problems such as spatial occupation, inconvenient installment and heavy mass.