摘要
通过多重调谐质量阻尼器 ( MTMD)系统参数的可能组合 ,得到了 5种 MTMD模型 .基于结构受控振型—— MTMD系统的力学模型 ,建立了设置这 5种 MTMD时结构的传递函数和动力放大系数统一表达式 .于是 5种 MTMD的优化准则可统一定义为结构最大动力放大系数的最小值的最小化 .基于 MTMD的优化结果即最优频率间隔、最优平均阻尼比和最优调谐频率比 ,利用Wilson-θ法对一 2 2层高层钢结构 - MTMD系统进行了时程分析 .分析中所用地震波分别为 :EL-Centro地震波 ,Taft地震波 ,天津地震波和上海地震波 .进而评价了 5种 MTMD的地震反应控制效果和冲程情况 .研究表明 ,在高层钢结构建筑的 MTMD地震反应控制中宜优先考虑MTMD( )和 MTMD( )
Through the combinations available of the MTMD system parameters, five new MTMD models were proposed. Based on the controlled mode (referred to as the main system)-MTMD system, the transfer function of the main system with the five kinds of MTMD was formulated. The unified formula was derived for the dynamic magnification factor of the main system with five kinds of MTMD. The optimum criterion, which can be stated as the minimization of the minimum values of the maximum dynamic magnification factors, was taken into account. Employing the optimum parameters obtained and with resorting to Wilson-θ approach, the time-history analysis was carried out for the 22-storey steel-structure building with five types of MTMD under different earthquake waves. Earthquake waves considered herein include EL-Centro earthquake wave, Taft earthquake wave, Tianjin earthquake wave, and Shanghai earthquake wave. An evaluation was made on the effectiveness of the five kinds of MTMD and their maximum strokes. It is shown that it is preferable to select MTMD (I) and MTMD(V) in suppressing the seismic response of structures by use of MTMD.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2003年第4期556-561,共6页
Journal of Shanghai Jiaotong University
