含减振子结构的巨型框架结构减震分析
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摘要
为了改善巨型框架结构体系的抗震性能,提出一种新型的结构体系-含减振子结构巨型框架结构。设计了一典型钢筋混凝土巨型框架结构,将一子框架转变为减振子结构形成含减振子结构的巨型框架结构,采用有限元软件针对该普通巨型框架结构及其减振结构建立了有限元模型并进行了地震弹性反应对比分析,研究了减振子结构和整体结构频率比以及隔震支座阻尼对减震效果的影响。研究结果表明:减振子结构具有显著的减震效果,对频率比有较好的鲁棒性;随着隔震支座阻尼系数增大减震效果逐渐增大,当其大于0.4后,减震效果增加不明显。这为进一步研究该结构体系的奠定了基础,也为该结构的实际工程应用提供了参考。
In order to improve the seismic performance of mega-frame structures, a new type of structural system, i.e. mega-frame structures with a vibration absorption substructure, was put forward. A typical mega frame structure and a mega-frame structure with a vibration absorption substructure were designed. Their elastic earthquake responses were analyzed and both results were compared. The influence of frequency ratio and damping on the damping effect was studied. The results show that the vibration absorption substructure has a significant damping effect which has an excellent robustness against the frequency ratio. The damping effect is increased significantly by increasing the isolation bearing damping coefficient ratios until they are greater than 0.4. This work will be helpful in theoretical research and give some assistance to practical engineering.
In order to improve the seismic performance of mega-frame structures, a new type of structural system, i.e. mega-frame structures with a vibration absorption substructure, was put forward. A typical mega frame structure and a mega-frame structure with a vibration absorption substructure were designed. Their elastic earthquake responses were analyzed and both results were compared. The influence of frequency ratio and damping on the damping effect was studied. The results show that the vibration absorption substructure has a significant damping effect which has an excellent robustness against the frequency ratio. The damping effect is increased significantly by increasing the isolation bearing damping coefficient ratios until they are greater than 0.4. This work will be helpful in theoretical research and give some assistance to practical engineering.
引文
[1]Khan F R.Recent structural systems in steel for high-rise buildings[C]//Proceedings of the British Constructional Steelwork Association Conference on Steel in Architecture.London:British Constructional Steelwork Association,1969:55―65.
[2]Khan F R.Influence of design criteria on selection of structural systems for tall buildings[C]//Proceedings of the Canadian Structural Engineering Conference.Toronto:Canadian Steel Industries Construction Council,1972:1―15.
[3]Khan F R.Evolution of structural systems for high-rise buildings in steel and concrete[C].Tall buildings in the Middle East and East Europe:Proceedings of the 10th Regional Conference on Tall Buildings-Planning,Design and Construction,Czechoslovak Scientific and Technical Association,Bratislava,1973:75―92.
[4]Ali M M,Moon K S.Structural developments in tall buildings:current trends and future prospects[J].Architectural Science Review,2007,50(3):205―223.
[5]Taranath B S.Steel,Concrete,and composite design of tall buildings[M].New York:Mc Graw Hill,1997:1:50.
[6]Kim J,Jung M.Progressive collapse-resisting capacity of modular mega-frame buildings[J].The Structural Design of Tall and Special Buildings,2013,22(6):471―484.
[7]Zhang X A,Zhang J L,Wang D,Jiang J S.Controlling characteristic passive mega-sub controlled frame subjected to random wind loads[J].Journal of Engineering Mechanics,2005,131(10):1046―1055.
[8]Shu G P,Zhang Y F,Lu Z T,Zuo J,Xia C C,Jiang Han.The aseismic capability and shaking table experiment of mega-frame structures[C]//Innovation&Sustainability of Structures:Proceedings of the International Symposium on Innovation&Sustainability of Structures in Civil Engineering.Nanjing,China:Lu ZT,2005:398―414.
[9]Lan Z J,Tian Y J,Fang L,Liang S T,Wang X D.An experimental study on seismic responses of multifunctional vibration-absorption reinforced concrete megaframe structures[J].Earthquake Engineering and Structural Dynamics,2004,33(1):11―14.
[10]蒋庆.巨型框架结构的地震反应及基于小波分析的损伤研究[D].合肥:合肥工业大学,2011:27―44.Jiang Qing.Seismic response and damage analysis based on wavelet analysis of mega-frame structure[D].Hefei:Hefei University of Technology,2011:27―44.(in Chinese).
[11]Feng M Q,Mita A.Vibration control of tall buildings using mega subconfiguration[J].Journal of Engineering Mechanics,1995,121(10):1082―1088.
[12]Chai W,Feng M Q.Vibration control of super tall buildings subjected to wind loads[J].International Journal of Non-linear Mechanics,1997,32(4):657―668.
[2]Khan F R.Influence of design criteria on selection of structural systems for tall buildings[C]//Proceedings of the Canadian Structural Engineering Conference.Toronto:Canadian Steel Industries Construction Council,1972:1―15.
[3]Khan F R.Evolution of structural systems for high-rise buildings in steel and concrete[C].Tall buildings in the Middle East and East Europe:Proceedings of the 10th Regional Conference on Tall Buildings-Planning,Design and Construction,Czechoslovak Scientific and Technical Association,Bratislava,1973:75―92.
[4]Ali M M,Moon K S.Structural developments in tall buildings:current trends and future prospects[J].Architectural Science Review,2007,50(3):205―223.
[5]Taranath B S.Steel,Concrete,and composite design of tall buildings[M].New York:Mc Graw Hill,1997:1:50.
[6]Kim J,Jung M.Progressive collapse-resisting capacity of modular mega-frame buildings[J].The Structural Design of Tall and Special Buildings,2013,22(6):471―484.
[7]Zhang X A,Zhang J L,Wang D,Jiang J S.Controlling characteristic passive mega-sub controlled frame subjected to random wind loads[J].Journal of Engineering Mechanics,2005,131(10):1046―1055.
[8]Shu G P,Zhang Y F,Lu Z T,Zuo J,Xia C C,Jiang Han.The aseismic capability and shaking table experiment of mega-frame structures[C]//Innovation&Sustainability of Structures:Proceedings of the International Symposium on Innovation&Sustainability of Structures in Civil Engineering.Nanjing,China:Lu ZT,2005:398―414.
[9]Lan Z J,Tian Y J,Fang L,Liang S T,Wang X D.An experimental study on seismic responses of multifunctional vibration-absorption reinforced concrete megaframe structures[J].Earthquake Engineering and Structural Dynamics,2004,33(1):11―14.
[10]蒋庆.巨型框架结构的地震反应及基于小波分析的损伤研究[D].合肥:合肥工业大学,2011:27―44.Jiang Qing.Seismic response and damage analysis based on wavelet analysis of mega-frame structure[D].Hefei:Hefei University of Technology,2011:27―44.(in Chinese).
[11]Feng M Q,Mita A.Vibration control of tall buildings using mega subconfiguration[J].Journal of Engineering Mechanics,1995,121(10):1082―1088.
[12]Chai W,Feng M Q.Vibration control of super tall buildings subjected to wind loads[J].International Journal of Non-linear Mechanics,1997,32(4):657―668.
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