MTMD-耗能框架填充墙减震数值分析
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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.
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.
引文
[1]李春祥,韩兵康,杜冬.结构的多重双重调谐质量阻尼器控制策略[J].振动与冲击,2007,26(2):25-28.
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[3]朱金松.高层MTMD控制的布置及地震反应时程分析研究[D].桂林:广西大学,2008.
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[6]李春祥.地震作用下高层建筑TMD控制研究与设计[J].上海交通大学学报,1999,33(6):746-749.
[7]Li C X.Optimum multiple tuned mass dampers for structureunder the ground acceleration base on DDMF and ADMF[J].Earthquake Engineering and Structural Dynamics,2002,31:897-919.
[8]李春祥.基于系统参数均匀分布的新型多重调谐质量阻尼器模型[J].上海交通大学学报,2005,39(5):775-781.
[9]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[10]张耀庭,刘再华,胡冗冗.新型建筑调谐质量阻尼器的实验研究[J].工程力学,1999,16(1)34-44.
[11]熊仲明,霍小鹏,苏妮娜.一种新型基础滑移隔振框架结构体系的理论分析与研究[J].振动与冲击,2008,27(10):124-143.
[2]李春祥,熊学玉.地震作用下基于ADMF和系统参数组合的最优MTMD[J].计算力学学报,2002,19(3):291-298.
[3]朱金松.高层MTMD控制的布置及地震反应时程分析研究[D].桂林:广西大学,2008.
[4]苏熔化,梁冰,宋维源.结构-TMD系统抗震的优化参数研究[J].振动与冲击,2001,20(4):8-11.
[5]李春祥.地震作用下基于多准则的最优调谐质量阻尼器[J].上海交通大学学报,2002,36(11):1630-1633.
[6]李春祥.地震作用下高层建筑TMD控制研究与设计[J].上海交通大学学报,1999,33(6):746-749.
[7]Li C X.Optimum multiple tuned mass dampers for structureunder the ground acceleration base on DDMF and ADMF[J].Earthquake Engineering and Structural Dynamics,2002,31:897-919.
[8]李春祥.基于系统参数均匀分布的新型多重调谐质量阻尼器模型[J].上海交通大学学报,2005,39(5):775-781.
[9]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[10]张耀庭,刘再华,胡冗冗.新型建筑调谐质量阻尼器的实验研究[J].工程力学,1999,16(1)34-44.
[11]熊仲明,霍小鹏,苏妮娜.一种新型基础滑移隔振框架结构体系的理论分析与研究[J].振动与冲击,2008,27(10):124-143.
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