TLCD基础隔震框架结构的减振控制研究

为了避免和减轻由过大隔震层位移引起的损害,对基础隔震框架结构装设调频液柱阻尼器(tuned liquid column damper,简称TLCD)后混合系统的减振效果进行研究。建立了单层和多层混合控制系统在地震作用下的运动方程,采用TLCD-结构体系转化为调频质量阻尼器(tuned mass damper,简称TMD)-结构体系的等效方法,利用TMD参数优化公式,得到单个TLCD初始设计参数,并采用状态空间方程得到多个TLCD最优设计参数。通过对某8层基础隔震结构进行模拟,证明了该理论设计方法的合理性。该混合结构不仅可以减小隔震层位移和加速度,而且对上部结构位移和加速度反应都能更有效的控制。

Vibration Control of TLCD-Base Isolated Frame Structure

The vibration control effectiveness of a hybrid control system that consists of base isolated frame structure with tuned liquid column damper (TLCD) is investigated to avoid and mitigate the damage caused by the large displacement of isolated layer. The motion equations of the single-story and multi-story hybrid control systems under earthquake are established. The equivalent method of transforming the TLCD-main structure into tuned mass damper (TMD)-main structure is adopted. The initial design parameters of a single TLCD are obtained by using the optimization formula of TMD parameters, and the optimal design parameters of multiple TLCDs are obtained by using the state space equation. Numerical results of 8-story base isolated structure show that the theoretical design method is feasible. Moreover, this hybrid structure cannot only reduce the displacement and acceleration of the isolated layer, but also effectively mitigate superstructure response.