复合隔震支座在网格屋盖结构中的应用研究
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摘要
将铅芯橡胶隔震垫与碟簧组合形成复合隔震垫,并应用于网格屋盖结构,利用串联弹簧模型预估铅芯橡胶隔震垫参数,利用单质点弹簧模型预估碟簧参数,结合实际工程,进行了模态分析、水平地震动时程分析及竖向地震动时程分析,表明复合隔震技术降低屋盖、下部结构加速度反应60%左右,降低由于地震引起的基顶反力约30%,但水平地震下隔震屋盖的侧移增大显著,应引起注意;文中提出的隔震垫参数预估模型得到了地震动时程分析的验证,可为工程参考。
The lead-rubber bearing and the disk spring were combined to be a new composite isolation bearing,which was applied to the lattice roof structures.In the primary design,the series spring model was for pre-choosing the parameters of lead-rubber bearing,while the single spring model was for the parameters of disk spring.Jianzhen library was taken as an example for modal analysis and time history dynamic analysis respectively under horizontal and vertical ground motions.The results indicate that the composite isolation technology can decrease the acceleration of roof structure and the lower structure about 60%,decrease the reaction of restraints about 30%,however,under horizontal earthquake the lateral displacement of roof structure will be magnified evidently.The models for pre-choosing the parameters of isolation bearing is feasible for primary design.
The lead-rubber bearing and the disk spring were combined to be a new composite isolation bearing,which was applied to the lattice roof structures.In the primary design,the series spring model was for pre-choosing the parameters of lead-rubber bearing,while the single spring model was for the parameters of disk spring.Jianzhen library was taken as an example for modal analysis and time history dynamic analysis respectively under horizontal and vertical ground motions.The results indicate that the composite isolation technology can decrease the acceleration of roof structure and the lower structure about 60%,decrease the reaction of restraints about 30%,however,under horizontal earthquake the lateral displacement of roof structure will be magnified evidently.The models for pre-choosing the parameters of isolation bearing is feasible for primary design.
引文
[1]Shingu K,Fukushima K.Base isolation and fuzzy vibration control of a spherical shell subjected to seismic forces[C]//Proc.of Asia-PacificVibration Conference,Kitakyushu,Japan,1993:1413-1418.
[2]Shingu K,Hiratsuka K.Dynamic response of base isolated rotational shell with edge beam and vibration control of the shell[J].InternationalJournal of Space Structures,1997,12(4):173-179.
[3]Mokha AS,Lee P L,Wang X,et al.Seismic isolation design of the newinternational terminal at San.Francisco international airport[C].Proc.Stncetures Congress,Sydney,Australia,1999:95-98.
[4]陈以一.世界建筑结构设计精品选-日本篇[M].北京:中国建筑工业出版社,2001:121-122.
[5]施卫星,孙黄胜,李振刚,等.上海国家赛车场新闻中心高位隔震研究[J].同济大学学报,2005,33(12):1576-1580.
[6]杨飏,沈世钊,周大睿.Schwedler型单层网壳结构隔震分析[J].华中科技大学学报:城市科学版,2008,25(3):191-194.
[7]杨飏,范峰,沈世钊.短程线型单层网壳结构隔震机理研究[J].哈尔滨工业大学学报,2007,39(10):1529-1533.
[8]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001:4-6.
[9]荣强,程文穰.隔震层中设置蝶形弹簧的竖向隔震研究[J].工业建筑,2006,36(9):22-24.
[10]赵亚敏,苏经宇,周锡元,等.蝶形弹簧竖向隔震结构振动台试验及数值模拟研究[J].建筑结构学报,2008,29(6):99-106.
[11]瞿伟廉,周强,苏经宇,等.多层建筑结构水平剪扭-竖向地震反应的智能复合隔震控制[J].地震工程与工程振动,2003,23(5):187-195.
[12]唐柏鉴,沈之容,李亚明.屋盖结构柱顶隔震技术的研究[J].特种结构,2005,22(4):49-51.
[13]张建.网格屋盖隔震技术应用研究[D].镇江:江苏科技大学,2009:32-33.
[14]Tang Baijian,Li Yaming.Study on effect of roof-isolation in lattice roof structure[C]//Proc.of 5th International Conference on Advance inSteel Structure,Singapore,2007:856-864.
[2]Shingu K,Hiratsuka K.Dynamic response of base isolated rotational shell with edge beam and vibration control of the shell[J].InternationalJournal of Space Structures,1997,12(4):173-179.
[3]Mokha AS,Lee P L,Wang X,et al.Seismic isolation design of the newinternational terminal at San.Francisco international airport[C].Proc.Stncetures Congress,Sydney,Australia,1999:95-98.
[4]陈以一.世界建筑结构设计精品选-日本篇[M].北京:中国建筑工业出版社,2001:121-122.
[5]施卫星,孙黄胜,李振刚,等.上海国家赛车场新闻中心高位隔震研究[J].同济大学学报,2005,33(12):1576-1580.
[6]杨飏,沈世钊,周大睿.Schwedler型单层网壳结构隔震分析[J].华中科技大学学报:城市科学版,2008,25(3):191-194.
[7]杨飏,范峰,沈世钊.短程线型单层网壳结构隔震机理研究[J].哈尔滨工业大学学报,2007,39(10):1529-1533.
[8]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001:4-6.
[9]荣强,程文穰.隔震层中设置蝶形弹簧的竖向隔震研究[J].工业建筑,2006,36(9):22-24.
[10]赵亚敏,苏经宇,周锡元,等.蝶形弹簧竖向隔震结构振动台试验及数值模拟研究[J].建筑结构学报,2008,29(6):99-106.
[11]瞿伟廉,周强,苏经宇,等.多层建筑结构水平剪扭-竖向地震反应的智能复合隔震控制[J].地震工程与工程振动,2003,23(5):187-195.
[12]唐柏鉴,沈之容,李亚明.屋盖结构柱顶隔震技术的研究[J].特种结构,2005,22(4):49-51.
[13]张建.网格屋盖隔震技术应用研究[D].镇江:江苏科技大学,2009:32-33.
[14]Tang Baijian,Li Yaming.Study on effect of roof-isolation in lattice roof structure[C]//Proc.of 5th International Conference on Advance inSteel Structure,Singapore,2007:856-864.
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