新型可加速TMD及其地震控制效果的研究

Research on a new type of accelerated TMD and its seismic control effectiveness

提出一种新型可加速TMD,加速装置基于直线电机原理而设计。根据TMD的工作原理,制订了所设计TMD的加速策略,并采用VB编制了相应的程序。以单自由度结构的地震响应控制为例,采用数值模拟的方法,通过与被动TMD的比较,分析了新型可加速TMD的地震控制效果。以一个钢塔为例,讨论了加速装置应用于实际工程的可行性。结果表明:不同的地震波对被动TMD的控制效果有很大的影响,而所设计新型TMD在常见地震波的作用下,控制效果都明显好于被动TMD。

A new type of accelerated TMD is presented. Accelerating devices is designed based on linear motors. According to the working mechanism of TMD, accelerating rides are established. The analysis program is developed in VB platform. Seismic response of SDOF structures with passive TMD and accelerated TMD are analyzed. A steel tower is taken as an example to demonstrate the feasibility of accelerating device applying to real projects. From the analysis results, it can be concluded that （ 1 ） the control effect of normal passive TMD is greatly depended on the characteristics of ground motion and structures and sometimes not so good; （2） the control effectiveness of the proposed accelerated TMD is much better than normal TMD under typical earthquake acceleration recordings.