【摘要】 本文分析了TMD(Tuned mass damper)在刚性地基和柔性地基情况下的减震控制机理,以某6层钢筋混凝土框架结构为研究对象,分别考虑了土-结构动力相互作用对无TMD控制结构的影响,场地条件对TMD减震控制性能的影响和土-结构动力相互作用对TMD减震控制性能的影响。通过分析得出TMD控制系统的减震效果除了与输入地震动特性有关外,还与场地条件、上部结构和基础的动力特性等因素有关。如果土-结构动力相互作用体系的自振周期远离输入地震动的卓越周期,则相互作用体系的地震响应较小。地基土越软,框架建筑结构层间相对位移地震响应也就越小。如果考虑土-结构动力相互作用效应的影响设计TMD调频系统的自振周期,则TMD的控制效果会有一定程度的提高。更多还原

【Abstract】 The paper proposes a control mechanism of TMD(Tuned mass damper) structure for rigid foundation and flexible foundation. Based on the FEM model of 6 storeyed reinforced concrete frame structure, the soil-structure interaction (SSI) influence on the structure without TMD, site conditions influence on the TMD vibration control and influence of soil-structure interaction on the TMD are considered. By the analysis, the TMD vibration control effects are relevant with site conditions, upper structure and foundation dynamic properties in addition to the ground motion characteristics. If vibration period of structure considering soil structure interaction is away from the predominant period of seismic ground motion, the earthquake response has negligible effect on the structure. The structure has small relative displacement between layers in soft soil foundation. The TMD control effect would be enhanced when considering the soil-structure interaction in designing the vibration period of TMD.更多还原