摘要
研究子结构刚度对巨子型有控结构位移响应的影响。结合刚度变化研究附加阻尼对巨子型有控结构的影响规律,并分析附加阻尼在巨子型有控结构中的作用。结合12种场地工况研究巨子型有控结构减震性能对地震激励的适应性。结果表明:附加阻尼可以改进子结构动力性能,确保巨子型有控结构在更宽的激励频率范围内工作,且将巨、子结构的侧移响应进一步降低;子结构刚度越小,附加阻尼对巨子型有控结构的影响越大;巨子型有控结构中,附加阻尼存在优化区间;子结构刚度对优化区间影响不大;装有附加阻尼的巨子型有控结构相比于未安装附加阻尼前,对子结构侧移控制率可达81.9%,对巨结构侧移控制率可达71.5%;巨结构侧移响应控制率对场地条件具有很好的适应性。
The effect of the sub-structure stiffness on the dynamic performance of the mega-sub controlled frame was investigated.Effect rules of the additional damping to the mega-sub controlled frame with different sub-stuctural stiffness were researched,and the function of the additional damping in the mega-sub controlled frame was examined.Results show that the additional damping can improve the sub-structure dynamic performance,and ensure the mega-sub controlled frame to exert its self-control function,and further reduce the displacement of the mega-structure and the sub-structure.Optimized additional damping exits in the mega-sub controlled frame,and it is scarcely affected by the change of the sub-structure stiffness.Control ratio of the mega-sturcture displacement can be adapted to all kinds of sites well.
出处
《建筑结构》
CSCD
北大核心
2010年第12期94-97,共4页
Building Structure
基金
国家自然科学基金(51078311)
西北工业大学科技创新基金资助(M450211)
关键词
巨子型有控结构
随机振动
复模态分析
调谐减振原理
mega-sub controlled frame
random vibration
complex modal analysis
tuned vibtation-absorption theory
