世纪莲体育中心动力特性及反应谱分析
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摘要
以佛山市世纪莲体育中心大跨度轮辐式张拉索膜结构为研究对象,采用ANSYS程序建立有限元模型,分析其动力特性,并用振型分解反应谱法计算地震作用下结构的受力性能。研究结果表明:结构自振频率较低,频谱集中,频率跳跃现象不明显;结构以屋盖的竖向振动为主,具有较好的抗侧刚度和抗扭刚度;反应谱分析时,为保证各方向的模态质量参与系数在90%以上,建议其振型取140阶以上;地震作用对结构上压环、下压环及腹杆的内力影响较大,必须参与荷载组合;不同方向地震作用下,结构内力及位移存在显著差别,应同时考虑一维及多维地震作用的影响。
Using the program ANSYS,finite element model of the rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was conducted to investigate its dynamic characteristics and its mechanical performance under seismic loading.Study results indicate that the natural frequencies of the structure are all lower and frequency spectrums concentrate in a small range,and the frequency jumping phenomenon isn't in evidence.The structure's vibration is mainly vertical vibration,and its lateral stiffness and torsion rigidity are well.To ensure that the modal mass participating coefficient is more than 90%,the contributions of the former 140 modes should be considered when the analysis of response spectrum is done.Because the seismic loading can greatly influence the internal force of the upper compression ring,the lower compression ring,and the truss web,it should be calculated in the load combination.When the seismic loading on the structure is from different directions,the internal force and displacement of the structure have significant difference.So the effects of the different directions of the waves and their combinations should be considered together.
Using the program ANSYS,finite element model of the rung-shape long-span tensile cable-membrane structure in Foshan Century Lotus Stadium was conducted to investigate its dynamic characteristics and its mechanical performance under seismic loading.Study results indicate that the natural frequencies of the structure are all lower and frequency spectrums concentrate in a small range,and the frequency jumping phenomenon isn't in evidence.The structure's vibration is mainly vertical vibration,and its lateral stiffness and torsion rigidity are well.To ensure that the modal mass participating coefficient is more than 90%,the contributions of the former 140 modes should be considered when the analysis of response spectrum is done.Because the seismic loading can greatly influence the internal force of the upper compression ring,the lower compression ring,and the truss web,it should be calculated in the load combination.When the seismic loading on the structure is from different directions,the internal force and displacement of the structure have significant difference.So the effects of the different directions of the waves and their combinations should be considered together.
引文
[1]CECS 158:2004,膜结构技术规程[S].CECS 158:2004,Technical Specification for Mem-brane Structures[S].
[2]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.Civil and Structural Groups of Tsinghua University,Southwest Jiaotong University and Beijing JiaotongUniversity.Analysis on Seismic Damage of Buildingsin the Wenchuan Earthquake[J].Journal of BuildingStructures,2008,29(4):1-9.
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[9]王文胜,薄燕培,胡庆卫.佛山世纪莲体育中心索膜结构[C]//吕志涛.第十一届空间结构学术会议论文集.北京:中国建材工业出版社,2005:604-609.WANG Wen-sheng,BO Yan-pei,HU Qing-wei.TheCable-membrane Structure of Foshan Century LotusStadium[C]//LU Zhi-tao.The 11th Conference onShell and Spatial Structures.Beijing:China BuildingMaterial Industry Publishing House,2005:604-609.
[10]赵煜,贺拴海,宋一凡.在役索桁组合连续钢桥承载力综合评估方法[J].长安大学学报:自然科学版,2005,25(5):47-50.ZHAO Yu,HE Shuan-hai,SONG Yi-fan.EvaluationMethodology for Existing Truss-cable CompositeContinuous Steel Bridge[J].Journal of Chang’an Uni-versity:Natural Science Edition,2005,25(5):47-50.
[11]CLOUGH R W,PENZIEN J.Dynamics of Structures[M].New York:McGraw-Hill,2003.
[12]RUIZ-TERAN A M,APARICIO A C.Dynamic Amp-lification Factors in Cable-stayed Structures[J].Jour-nal of Sound and Vibration,2007,300(1/2):197-216.
[13]刘伟,钱锋.体育建筑中可开合屋面的应用与发展[J].建筑科学与工程学报,2010,27(4):121-126.LIU Wei,QIAN Feng.Application and Developmentof Retractable Roof in Sport Architecture[J].Journalof Architecture and Civil Engineering,2010,27(4):121-126.
[14]REN Jun-chao,ZHANG Qi-lin,TONG Li-ping.Staticand Dynamic Pre-tension Influence Analysis AboutZhengzhou International Conference Exhibition Center[C]//IASS.Proceedings of the 8th Asian Pacific Con-ference on Shell and Spatial Structures.Beijing:IASS,2006:256-257.
[15]SMEBY W,KIUREGHIAN A D.Modal CombinationRules for Multicomponent Earthquake Excitation[J].Earthquake Engineering and Structural Dynam-ics,1985,13(1):1-12.
[2]清华大学、西南交通大学、北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.Civil and Structural Groups of Tsinghua University,Southwest Jiaotong University and Beijing JiaotongUniversity.Analysis on Seismic Damage of Buildingsin the Wenchuan Earthquake[J].Journal of BuildingStructures,2008,29(4):1-9.
[3]周果行.“5.12”汶川地震震区建筑受损的内在原因分析[J].建筑科学与工程学报,2009,26(2):109-115.ZHOU Guo-xing.Anslysis of Internal Factors ofDamaged Buildings in“5.12”Wenchuan EarthquakeZone[J].Journal of Architecture and Civil Engineer-ing,2009,26(2):109-115.
[4]刘健新,赵国辉.“5.12”汶川地震典型桥梁震害分析[J].建筑科学与工程学报,2009,26(2):92-97.LIU Jian-xin,ZHAO Guo-hui.Typical Bridge DamageAnalysis in“5.12”Wenchuan Earthquake[J].Jour-nal of Architecture and Civil Engineering,2009,26(2):92-97.
[5]叶列平,曲哲,陆新征,等.提高建筑结构抗地震倒塌能力的设计思想与方法[J].建筑结构学报,2008,29(4):42-50.YE Lie-ping,QU Zhe,LU Xin-zheng,et al.CollapsePrevention of Building Structures:a Lesson from theWenchuan Earthquake[J].Journal of Building Struc-tures,2008,29(4):42-50.
[6]马玉宏,谢礼立,赵桂峰.抗震设防烈度的决策分析方法研究[J].世界地震工程,2007,23(1):86-90.MA Yu-hong,XIE L-ili,ZHAO Gui-feng.Research onDecision Analysis Method of Seismic Fortification In-tensity[J].World Earthquake Engineering,2007,23(1):86-90.
[7]GB 50011—2001,建筑抗震设计规范[S].GB 50011—2001,Code for Seismic Design of Build-ings[S].
[8]孙文波,王剑文,刘永桂,等.车辐式大跨度张拉索膜结构的自振和静风作用分析[J].工业建筑,2007,37(增1):672-675,690.SUN Wen-bo,WANG Jian-wen,LIU Yong-gui,et al.Research on Natual Vibration Frequency Analysis andStatic Wind Loads for a Rung-shape Tensile Cable-membrane Structure[J].Industrial Construction,2007,37(S1):672-675,690.
[9]王文胜,薄燕培,胡庆卫.佛山世纪莲体育中心索膜结构[C]//吕志涛.第十一届空间结构学术会议论文集.北京:中国建材工业出版社,2005:604-609.WANG Wen-sheng,BO Yan-pei,HU Qing-wei.TheCable-membrane Structure of Foshan Century LotusStadium[C]//LU Zhi-tao.The 11th Conference onShell and Spatial Structures.Beijing:China BuildingMaterial Industry Publishing House,2005:604-609.
[10]赵煜,贺拴海,宋一凡.在役索桁组合连续钢桥承载力综合评估方法[J].长安大学学报:自然科学版,2005,25(5):47-50.ZHAO Yu,HE Shuan-hai,SONG Yi-fan.EvaluationMethodology for Existing Truss-cable CompositeContinuous Steel Bridge[J].Journal of Chang’an Uni-versity:Natural Science Edition,2005,25(5):47-50.
[11]CLOUGH R W,PENZIEN J.Dynamics of Structures[M].New York:McGraw-Hill,2003.
[12]RUIZ-TERAN A M,APARICIO A C.Dynamic Amp-lification Factors in Cable-stayed Structures[J].Jour-nal of Sound and Vibration,2007,300(1/2):197-216.
[13]刘伟,钱锋.体育建筑中可开合屋面的应用与发展[J].建筑科学与工程学报,2010,27(4):121-126.LIU Wei,QIAN Feng.Application and Developmentof Retractable Roof in Sport Architecture[J].Journalof Architecture and Civil Engineering,2010,27(4):121-126.
[14]REN Jun-chao,ZHANG Qi-lin,TONG Li-ping.Staticand Dynamic Pre-tension Influence Analysis AboutZhengzhou International Conference Exhibition Center[C]//IASS.Proceedings of the 8th Asian Pacific Con-ference on Shell and Spatial Structures.Beijing:IASS,2006:256-257.
[15]SMEBY W,KIUREGHIAN A D.Modal CombinationRules for Multicomponent Earthquake Excitation[J].Earthquake Engineering and Structural Dynam-ics,1985,13(1):1-12.
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