【摘要】 使用傅里叶变换,建立了土-不规则建筑-AMTMD相互作用系统的动力方程。AMTMD参数准则定义为:设置AMTMD结构的最大平动和扭转角位移动力放大系数的最小值的最小化。定义AMTMD有效性准则为:设置AMT-MD结构的最大位移动力放大系数的最小值的最小化与未设置AMTMD结构的最大位移动力放大系数的比值。基于定义的准则,研究不规则建筑标准化偏心系数(NER)、扭转对侧向频率比(TTFR)、土对结构的刚度比(SRSS)和高基比(HBR)对AMTMD最优参数和有效性的影响,为软土地基不规则建筑的地震振动控制设计与实现提供参考。更多还原

【Abstract】 The dynamic equations of a soil-asymmetric structure-active multiple tuned mass dampers(AMTMD) interaction system are developed using Fourier Transformation.The parameter criterion of AMTMD is defined as minimizing the minimum values of the maximum displacement dynamic magnification factors(DMF) of the asymmetric structure with AMTMD.The effectiveness criterion of AMTMD is selected as the ratio of the minimization of the minimum values of the maximum displacement DMF of the asymmetric structure with AMTMD to the maximum displacement DMF of the asymmetric structure without AMTMD.Employing the above-defined criteria,the parametric studies on the influences of normalized eccentricity ratio(NER),torsional to translational frequency ratio(TTFR),stiffness ratio of soil relative to structure(SRSS),and height-to-base ratio(HBR) of the soil-asymmetric structure interaction system on the optimum parameters and effectiveness of AMTMD are then carried out.Through the extensive numerical analysis,the suggestions obtained herein are useful for the design and implementation in the earthquake reduction of asymmetric structures built on soft soil foundation.更多还原