偏心框架结构采用扭转调谐液柱阻尼器的设计方法

扭转调谐液柱阻尼器(torsional tuned liquid column damper,TTLCD)是一种有效的扭转振动控制装置.本文对该阻尼器在偏心框架结构中的设计方法进行研究,针对不同的倾斜管道投影点和倾斜角,建立了三种形式的扭转调谐液柱阻尼器在地震作用下的运动方程和控制力方程,给出TTLCD参数优化的具体公式,其方法为对比扭转调谐液柱阻尼器-偏心结构和扭转调频质量阻尼器(torsional tuned mass damper,TTMD)-偏心结构,将两控制系统转化,利用Den Hartog或Ikeda给出的调频质量阻尼器(tuned liquid mass damper,TMD)参数优化公式来实现TTLCD参数优化,最后给出TTLCD的设计流程.通过对一个四层偏心框架结构进行模拟,验证了理论设计方法的合理性.

Design method for torsional tuned liquid column damper for eccentric frame structure

The torsional tuned liquid column damper ( TTLCD ) is a cost-effective passive device for reducing the torsional response of a plan-asymmetric building under wind or seismic load. In this paper, the equations of relative liquid motion in three kinds of TTLCDs, as well as the control forces with the reference point and various inclined angles of the upright columns were derived. The optimal TTLCD control parameters were given through transforming method of the TTLCD-structure equivalent to a TTMD-structure system using Den Hartog or Ikeda formulas. Finally, the TTLCD design method was evaluated and the TTLCD design process was described. The numerical results of a four-storey plan-asymmetric structure show that TTLCDs can effectively mitigate earthquake-induced coupled flexural torsional responses and that the proposed method is feasible.