某超高层建筑电涡流TMD的减震分析
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摘要
上海某超高层建筑结构总高度632 m,风致振动为结构的控制荷载并决定大楼舒适度,大楼首创式安装了变阻尼摆式电涡流TMD来降低大楼顶部风致振动加速度,地震效应考量控制了质量块最大摆动位移。为保证质量块在罕遇地震下不撞击主体结构,在质量块底部周围设置了距底部限位杆间距为1.5 m的限位环。按照能量等效原理,将电涡流TMD阻尼大小随位移变化的特性进行等效阻尼处理;采用通用有限元软件分析了无TMD及设置TMD在有、无限位环下的7度罕遇地震响应,并计算了质量块和限位环碰撞冲击力的数值。分析表明,TMD的减震效果不显著;阻尼力和碰撞冲击力相比楼层地震剪力很小;限位环反力不会使结构响应出现奇异变化,地震下TMD的行为是安全的。
A super high-rise building with the height of 632 meters was built in Shanghai. The degree of comfort is controlled by wind-induced vibration. Therefore,eddy-current tuned mass damper( TMD) was installed to reduce the wind-induced acceleration of the top floor. On the other hand,the maximum amplitude of TMD is decided by seismic effect. To avoid the collision between TMD and major structure,a snubber ring with the space being 1. 5m is set around the TMD mass. Displacement-dependent damping of the eddy-current TMD is transformed to equivalent damping according to the energy equivalence principle. The case without TMD,the case with TMD and a snubber ring and the case with TMD but without snubber ring,are analyzed for rare earthquake of 7 degree. Calculation of the impact force between TMD mass and the snubber ring is also included. The analysis results indicate that the anti-seismic effect of the eddy-current TMD is not significant,damping force and impact force are very small compared to story shears,reaction force of the snubber ring does not make a big change to the structural response,and that TMD will perform well under earthquakes.
A super high-rise building with the height of 632 meters was built in Shanghai. The degree of comfort is controlled by wind-induced vibration. Therefore,eddy-current tuned mass damper( TMD) was installed to reduce the wind-induced acceleration of the top floor. On the other hand,the maximum amplitude of TMD is decided by seismic effect. To avoid the collision between TMD and major structure,a snubber ring with the space being 1. 5m is set around the TMD mass. Displacement-dependent damping of the eddy-current TMD is transformed to equivalent damping according to the energy equivalence principle. The case without TMD,the case with TMD and a snubber ring and the case with TMD but without snubber ring,are analyzed for rare earthquake of 7 degree. Calculation of the impact force between TMD mass and the snubber ring is also included. The analysis results indicate that the anti-seismic effect of the eddy-current TMD is not significant,damping force and impact force are very small compared to story shears,reaction force of the snubber ring does not make a big change to the structural response,and that TMD will perform well under earthquakes.
引文
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[7]丁洁民,巢斯,赵昕,等.上海中心大厦结构分析中若干关键问题[J].建筑结构学报,2010(6):122-131.DING Jiemin,CHAO Si,ZHAO Xin,et al,Critical issues of structural analysis for the Shanghai Center project[J].Journal of Building Structures,2010(6):122-131.(in Chinese)
[8]Jankowski R,Wilde K,Fujino Y.Pounding of superstructure segments in isolated elevated bridge during earthquakes[J].Earthquake engineering&structural dynamics,1998,27(5):487-502.
[9]Robert Jankowski,Krzysztof Wilde and Yozo Fujino.Reduction of Pounding effects in Elevated Bridges During Earthquakes[J].Earthquake Engineering and Structural Dynamics,2000,29:195-212.
[10]方重,吴和霖,楼梦麟.电磁涡流耗能调谐质量阻尼器研制与性能试验[J].同济大学学报:自然科学版,2001,29(6):752-756.FANG Zhong,WU Helin,LOU Menglin.Development of electromagnetism vortex flow energy dissipation TMD devices and test study on its property[J].Journal of Tongji University:Natural Science,2001,29(6):752-756.(in Chinese)
[2]李建中,范立础.非规则梁桥纵向地震反应及碰撞效应[J].土木工程学报,2005,38(1):84-90.LI Jianzhong,FAN Lichu.Longitudinal seismic response and pounding effects of girder bridges with unconventional configurations[J].Journal of Civil Engineering,2005,38(1):84-90.(in Chinese)
[3]葛藤,贾智宏,周克栋.钢球和刚性平面弹塑性正碰撞恢复系数研究[J].工程力学,2008,25(6):209-213.GE Teng,JIA Zhihong,ZHOU Kedong.Research on elastoplastic normal impact of steel spheres against a rigid plane[J].Engineering Mechanics,2008,25(6):209-213.(in Chinese)
[4]陈永祁,彭程,马良喆.调谐质量阻尼器(TMD)在高层结构上应用的总结与研究[J].城市地下空间综合开发技术交流会论文集,2013.CHEN Yongqi,PENG Cheng,MA Liangzhe.Effect analysis of tuned mass damper(TMD)in high-rise structure[J].Urban underground space comprehensive development technology exchange meeting proceedings,2013.(in Chinese)
[5]罗永峰,王磊,李海锋,等.罕遇地震下上海中心超高层的性能化抗震设计[J].同济大学学报:自然科学版,2011,39(4):467-473.LUO Yongfeng,WANG Lei,LI Haifeng,et al,Performance-based seismic design of shanghai tower under rare earthquake[J].Journal of Tongji University:Natural Science,2011,39(4):467-473.(in Chinese)
[6]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.LIANG Dianjun,Research of earthquake resistance of non-linear tmd in super hig-rise structure[D].Xi'an:Xi'an University of Technology,2006.(in Chinese)
[7]丁洁民,巢斯,赵昕,等.上海中心大厦结构分析中若干关键问题[J].建筑结构学报,2010(6):122-131.DING Jiemin,CHAO Si,ZHAO Xin,et al,Critical issues of structural analysis for the Shanghai Center project[J].Journal of Building Structures,2010(6):122-131.(in Chinese)
[8]Jankowski R,Wilde K,Fujino Y.Pounding of superstructure segments in isolated elevated bridge during earthquakes[J].Earthquake engineering&structural dynamics,1998,27(5):487-502.
[9]Robert Jankowski,Krzysztof Wilde and Yozo Fujino.Reduction of Pounding effects in Elevated Bridges During Earthquakes[J].Earthquake Engineering and Structural Dynamics,2000,29:195-212.
[10]方重,吴和霖,楼梦麟.电磁涡流耗能调谐质量阻尼器研制与性能试验[J].同济大学学报:自然科学版,2001,29(6):752-756.FANG Zhong,WU Helin,LOU Menglin.Development of electromagnetism vortex flow energy dissipation TMD devices and test study on its property[J].Journal of Tongji University:Natural Science,2001,29(6):752-756.(in Chinese)
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