基于能量的高层建筑分段隔震体系参数优化  

Energy-based parameters optimization of segmented isolation system for high-rise building

作　　者：高剑平[1] 潘月月[1] 

机构地区：[1]铁路环境振动与噪声教育部工程研究中心,江西南昌330013

出　　处：《地震工程与工程振动》2011年第2期124-129,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50868006)

摘　　要：针对带转换层复杂高层建筑抗震性能较差的缺点,提出新型的分段隔震体系。本文从随机振动理论和能量平衡原理出发,建立了基于能量的分段隔震结构被动控制参数优化方法。通过MATLAB编程对算例进行多工况参数分析,获得了控制参数对隔震层与地震总输入能量的比值的影响规律:中间隔震层位于结构中部附近时,存在最优频率比和阻尼比使得隔震层的滞回耗能与地震总输入能量的比值最大;质量比较小时,结构通过改变频率比减震;随着质量比的增大,结构通过改变频率比和延长自振周期共同减震;质量比增大至一定值时,结构基本依靠延长自振周期减震。This paper proposes so called segmented isolation system to improve the poor seismic performance of complex high-rise building with transfer story.The random vibration theory and the principle of energy balance are adopted to develop the method of energy-based parameters optimization.Subsequently,the variation of the ratio of the isolation layer hysteretic energy to the total seismic input energy is shown by analyzing the structure parameters.When the location of the intermediate isolation layer is approximate to the middle story of the structure,the ratio is the highest.With the increasing of the mass ratio,the seismic responses of the structure are reduced by varying the frequency ratio at first,then by extending the natural vibration period.

关 键 词：高层建筑 转换层 分段隔震 能量 参数优化 

分 类 号：P315.966[天文地球—地震学] TU352.12[天文地球—固体地球物理学]