新型围护墙MTMD减震结构减震性能试验研究
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摘要
为研究新型围护墙MTMD减震结构的振动控制方式及减震性能,在不同的围护墙TMD布置方式条件下,采用不同连接刚度的阻尼器,依次输入加速度峰值递增的El Centro波,进行1/3比例模型结构的振动台试验,并进行结构振动特性试验,将测试结果与普通抗震结构的结果进行对比。振动台试验结果表明,在不同减震工况条件下,结构的加速度及位移最大减震率较为接近,约为30%,结构顶层的减震率最大;振动测试结果表明,减震结构的振动特性主要由第1阶平动振型决定。因此,当围护墙TMD数量不多、结构层数较少时,不同的TMD布置方案下,结构的减震率变化不显著,围护墙MTMD减震结构的受控振型为第1阶振型。
To research the vibration control means and vibration absorption performance of the enclosure wall MTMD(Multiple Tuned Mass Damper)vibration absorption structure which is a new vibration absorption structure,the model scaled in 1/3 shake-table test was done under different disposal methods of TMD and different dampers in link stiffness under the peak value of acceleration of El Centro wave ascended.At the same time,vibration performance test was done.The test results were compared with the ordinary seismic structure.The results show that the rate of vibration reduction of displacement and acceleration is closer under different vibration absorption case which is about 30%.The peak value ratio of vibration reduction lies in the top story.The vibration test results indicate that the vibration characteristics are inferred from the first stage of horizontal vibration type.Therefore,when the enclosure wall TMD and story of structure are not many,the change of rate of vibration reduction is not remarkable under different disposals of TMD.And the controlled vibration type of enclosure wall MTMD is the first stage.
To research the vibration control means and vibration absorption performance of the enclosure wall MTMD(Multiple Tuned Mass Damper)vibration absorption structure which is a new vibration absorption structure,the model scaled in 1/3 shake-table test was done under different disposal methods of TMD and different dampers in link stiffness under the peak value of acceleration of El Centro wave ascended.At the same time,vibration performance test was done.The test results were compared with the ordinary seismic structure.The results show that the rate of vibration reduction of displacement and acceleration is closer under different vibration absorption case which is about 30%.The peak value ratio of vibration reduction lies in the top story.The vibration test results indicate that the vibration characteristics are inferred from the first stage of horizontal vibration type.Therefore,when the enclosure wall TMD and story of structure are not many,the change of rate of vibration reduction is not remarkable under different disposals of TMD.And the controlled vibration type of enclosure wall MTMD is the first stage.
引文
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[3]李春祥.高层钢结构抗风抗震控制优化设计理论与方法研究[D].上海:同济大学,1998.
[4]吕西林,叶骅,方重.伺服电机TMD控制系统的研制与振动台试验[J].振动工程学报,2000,13(1):61-70.
[5]卢俊龙.围护墙TMD减震结构协同工作及减震性能研究[D].西安:长安大学,2011.
[6]金玲.地震作用下多个调谐质量阻尼器的优化设计[D].长春:吉林大学,2008.
[7]姚谦峰.建筑结构试验[M].北京:中国建筑工业出版社,2008.
[8]李娟.层间隔振结构理论与试验研究[D].西安:西安建筑科技大学,2006.
[9]李钢,李宏男.新型软钢阻尼器的减震性能研究[J].振动与冲击,2006,25(3):66-72,207.
[10]熊仲明,霍晓鹏,苏妮娜.一种新型基础滑移隔震框架结构体系的理论分析与研究[J].振动与冲击,2008,27(10):124-129,143.
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