摘要
在多功能围护墙减震结构体系中,围护墙作为一个质量调谐减震阻尼器(TMD)中的质量块,可以克服传统框架结构在动力荷载作用下不能持久耗能的缺点。为了研究新型围护墙减震结构的减震性能,使MTMD减震技术更好的应用于结构设计,结合MTMD体系的减震原理、参数优化设计方法,对MTMD-钢框架结构系统的减震装置参数进行分析;应用SAP2000数值分析软件对结构的振动特性进行计算;采用时程分析法分别对普通钢框架、MTMD减震钢框架的地震反应进行对比分析。计算结果表明:基于多功能围护墙减震结构体系的MTMD钢框架具有显著的减震效果。模态分析得出各阶振动周期相应增大2-3倍;从时程分析结果来看,能够有效地减小结构地震反应峰值,减震效果一般在5%-40%之间。为MTMD在结构抗震方面的设计提供理论依据。
The enclosure wall vibration-absorption structure is a new kind of frame structure with MTMD system, in which the enclosure wall acts as a mass block in TMD, can overcome the shortcoming that the frame structures can＇t absorb energy persistently. In order to study the vibration-absorption effect of the MTMD in enclosure wall structures and apply the MTMD technology in structure design conveniently, damping parameters of vibration-absorption device in MTMD-steel frame structure were studied based on the vibration-absorption principle of MTMD systems and parameter optimal design method. The vibration performance of the structure was calculated by using the finite element software SAP2000. By the time-history analysis, the accelerations and displacements of the traditional steel-frame model and MTMD-steel frame model were compared. The results indicate that： MTMD-steel frame structure with the enclosure wall has a significant seismic reduction effect. The periods of the MTMD model are 2 or 3 times more than those of the general frames according to the modal analysis. It can effectively reduce the structural response; the damping rate reaches generally about 5% - 40% in accordance with the time-history analysis,. The analysis provides a theoretical basis and reference to construction design.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第4期86-91,共6页
Journal of Vibration and Shock
基金
国家自然科学基金项目(50868011)
陕西省重点学科建设专项资金资助项目(E01001
E01003)
关键词
MTMD
减震技术
有限元分析
时程分析
multiple tuned mass dampers （MTMD）
shock absorption technique
finite element analysis
time- history analysis
