摘要
利用上部结构等效模拟TMD(TunedMassDamper调谐质量阻尼器)作用,讨论了上部结构对下部结构的反馈作用,提供一种经济、实用的减震方法。通过理论分析及正矢波基底输入计算数据与9组实验数据比较得出结论,TMD减震作用并不乐观,其位移与加速度并非处处同时减小。由于选择质量比和刚度比的范围较窄,在工程实践中很难实现参数控制,因而,必须提高建筑结构实测参数精度,图纸设计参数与实际结构参数相差较大,很难满足TMD减震设计最佳效果要求。不如利用上部结构对下部结构的反馈作用力来实现减震,这样似乎更为经济、实用。
Top structure′s feedback effect on underpart structure is analyzed in this paper by simulating structure as a TMD. Top structure′s existence can reduce underpart structure′s earthquake damage.On the basis of theory analyses and computing data, TMD′s shock attenuation is obvious, but structure′s displacement and acceleration don′t reduce at the same time. Because the selection ranges of mass ratio and rigidity ratio are limited and parameter control is difficult in practice,the precision of structure′s survey parameters must be enhanced. If design parameter is deviated far from practical parameter,TMD′s shock attenuation effect will be reduced. The top strueture's feedback effect on underpart structure is more economic and practical than TMD.
出处
《地震工程与工程振动》
CSCD
北大核心
2004年第1期87-91,共5页
Earthquake Engineering and Engineering Dynamics
基金
国家地震局"八五"重点项目(85-07-02-02-06)
