【摘要】 为了达到隔震设计的目的并检验隔震层的工作性能,测试分析了采用首层柱顶隔震技术的某五层框架结构在环境激励和初位移条件下的动力特性,得到了结构的前3阶自振特性如自振频率、振型和阻尼比;分析了初位移条件下隔震层的自由衰减曲线和滞回性能。结果表明:环境激励条件下,隔震结构与非隔震结构动力特性相近,隔震结构在正常使用状态下具有足够的稳定性;初位移条件下,隔震结构的自振周期比非隔震结构长,结构的阻尼比较大,隔震层滞回曲线较饱满,隔震层具有快速复位的特性,能消除长期以来有关对隔震层是否具有自动复位特性的疑虑。更多还原

【Abstract】 In order to achieve the purpose of isolation design and examine the performance of isolation layer,dynamic properties are tested and analyzed for a five-story frame-structure on which the first-floor isolation technology is applied under environmental vibration and different initial displacements of isolation layer.The structure’s first three natural vibration characteristics including frequencies,mode shapes and damping ratios are obtained.Hysteresis curves and free damping curves under different initial displacements of isolation layer are drew and analyzed.Test and analysis results indicate that the isolated structure and the un-isolated structure have similar dynamic properties under environmental vibration,and the isolated structure with full hysteresis loops has adequate stability,longer period and higher damping ratios than un-isolated structure.Isolation layer has obvious property of resetting,which answers the long-term question whether the isolation layer has the property of resetting.更多还原