非线性TMD应用对高层框筒结构减震效果的影响
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摘要
当前减震技术中,基础隔震效果较好,使用较多,但对建筑本身要求较高,使用范围受限;在强震下,具有消能减震体系的结构减震效果较好,但需要提供较大阻尼,经济投入较多.在充分结合橡胶支座基础隔震和TMD研究成果的基础上,提出非线性TMD的减震技术方法.在一高层框筒结构中采用该减震技术,并用有限元软件分析结构的地震响应,包括主结构和TMD子结构的层间位移、层加速度和位移时程曲线等,各指标均反映出结构的明显减震效果.为高层建筑结构的减震控制提出一种新的技术思路.
The base isolation in current damping-isolation technology exhibits a good effect and is used more frequently.However,the demand to the building itself is higher and its usage limited.Under strong earthquake,the damping effect of damping-isolation structure is better,but need to provide larger damping and larger economic investment.A non-linear TMD damping-isolation technology was put forward on the basis of TMD research result of base isolation with rubber bearings for base isolation.By making a model of high frame-tube structure with this non-linear TMD damping technology and analyzing seismic response of the structure with finite element software,the layer-to-layer displacement,layer acceleration,and time-history curves of displacement and acceleration were obtained for the main structure and TMD substructure.These indicators reflected a good damping effect of the structure,providing a new technical idea of vibration damping for tall structures.
The base isolation in current damping-isolation technology exhibits a good effect and is used more frequently.However,the demand to the building itself is higher and its usage limited.Under strong earthquake,the damping effect of damping-isolation structure is better,but need to provide larger damping and larger economic investment.A non-linear TMD damping-isolation technology was put forward on the basis of TMD research result of base isolation with rubber bearings for base isolation.By making a model of high frame-tube structure with this non-linear TMD damping technology and analyzing seismic response of the structure with finite element software,the layer-to-layer displacement,layer acceleration,and time-history curves of displacement and acceleration were obtained for the main structure and TMD substructure.These indicators reflected a good damping effect of the structure,providing a new technical idea of vibration damping for tall structures.
引文
[1]方鄂华,钱稼茹,叶烈平.高层建筑结构设计[M].北京:中国建筑工业出版社,2003:316-318.
[2]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):743-749.
[3]李春祥,刘艳霞.地震作用下高层建筑TMD控制优化设计[J].同济大学学报,1999,27(3):287-291.
[4]李中锡,周锡元.规则型隔震房屋的自振特性和地震反应分析方法[J].地震工程与工程振动,2002,22(2):33-41.
[5]鲍华,徐礼华,周友.多层框架基础隔震体系非线性地震反应分析[J].建筑技术开发,2003,30(7):44-46.
[6]张玉良,汪洋,张铜生.橡胶垫隔震结构弹塑性动力分析[J].建筑结构,2003,33(1):64-67.
[7]梁殿君.非线性TMD应用于超高层建筑的减震研究[D].西安:西安理工大学,2006:12-20.
[2]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):743-749.
[3]李春祥,刘艳霞.地震作用下高层建筑TMD控制优化设计[J].同济大学学报,1999,27(3):287-291.
[4]李中锡,周锡元.规则型隔震房屋的自振特性和地震反应分析方法[J].地震工程与工程振动,2002,22(2):33-41.
[5]鲍华,徐礼华,周友.多层框架基础隔震体系非线性地震反应分析[J].建筑技术开发,2003,30(7):44-46.
[6]张玉良,汪洋,张铜生.橡胶垫隔震结构弹塑性动力分析[J].建筑结构,2003,33(1):64-67.
[7]梁殿君.非线性TMD应用于超高层建筑的减震研究[D].西安:西安理工大学,2006:12-20.
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