Kiewitt型弦支穹顶结构自振特性研究
|
摘要
弦支穹顶结构的自振特性是其本身固有的重要力学性能.运用有限元方法,基于ADINA软件建立了大跨度Kiewitt型弦支穹顶结构非线性动力特性分析的有限元模型.首先对35.4m跨度的K6型弦支穹顶结构进行了自振性能分析,得出结构前15阶自振频率及振型,由于弦支穹顶结构的对称性,其前15阶自振频率数值密集且变化均匀,说明结构的刚度分布均匀合理;前两阶振型水平与竖向振动同时存在,后几阶以竖向振动为主.着重针对环索预应力、撑杆长度、杆件截面、矢跨比四个因素对自振频率的影响进行了分析,拉索预应力及杆件截面对自振频率的影响非常小,矢跨比是影响自振性能最敏感的因素.
Natural vibration characteristic is an extremely important inherent mechanical property of suspendome structure.By using finite element method,nonlinear dynamic models of large-span Kiewitt suspendome were built based on ADINA.The first 15 modes and 15 frequencies of a K6 suspendome with 35.4 meters span were obtained.Because of the symmetry of structure,the former 15 natural frequencies have only small changes,which indicates the stiffness is uniformly distributed.The first two mode shapes are both in horizontal and vertical direction,and the latter modes are mainly vertical.The influences on natural frequency of four parameters including prestress,bar length,section area and rise to span ratio were studied.The results show that cable prestress and section area have little impact on the natural frequencies,while the rise-to-span ratio is the most sensitive factor.
Natural vibration characteristic is an extremely important inherent mechanical property of suspendome structure.By using finite element method,nonlinear dynamic models of large-span Kiewitt suspendome were built based on ADINA.The first 15 modes and 15 frequencies of a K6 suspendome with 35.4 meters span were obtained.Because of the symmetry of structure,the former 15 natural frequencies have only small changes,which indicates the stiffness is uniformly distributed.The first two mode shapes are both in horizontal and vertical direction,and the latter modes are mainly vertical.The influences on natural frequency of four parameters including prestress,bar length,section area and rise to span ratio were studied.The results show that cable prestress and section area have little impact on the natural frequencies,while the rise-to-span ratio is the most sensitive factor.
引文
[1]姚姝,范峰.K6型弦支穹顶结构的静力性能分析[J].建筑结构学报,2008,38(2):43-46.YAO Shu,FAN Feng.Static analysis of K6 suspen-dome structure[J].Journal of Building Structures,2008,38(2):43-46.
[2]李永梅,赵青英.Kiewitt型弦支穹顶结构动力稳定性研究[J].工业建筑,2009,(增刊):405-409.LI Yong-mei,ZHAO Qing-ying.Study on dynamic sta-bility of Kiewitt suspendome[J].Industrial Construc-tion,2009,(Supplement):405-409.
[3]张爱林,王冬梅.奥运会羽毛球馆弦支穹顶结构模型动力特性试验及理论分析[J].建筑结构学报,2008,28(6):68-75.ZHANG Ai-lin,WANG Dong-mei.Dynamic perform-ance experi ment and theoretical analysis on the suspend-dome structure model of the badminton gymnasiumfor2008 Olympic Games[J].Journal of Building Struc-tures,2008,28(6):68-75.
[4]康文江,陈志华.弦支穹顶结构体系的动力性能研究[J].工业建筑,2003,(增刊):577-582.KANG Wen-jiang,CHEN Zhi-hua.Study on the dy-namic performance of suspendome[J].Industrial Con-struction,2003,(Supplement):577-582.
[5]崔晓强,郭彦林.弦支穹顶结构的抗震性能研究[J].地震工程与工程振动,2005,25(1):67-75.CUI Xiao-qiang,GUO Yan-li.Seismic behaviors of sus-pen-dome structure[J].Journal of Earthquake Engineer-ing and Engineering Vibration,2005,25(1):67-75.
[6]陈志华,郭云.弦支穹顶结构预应力及动力性能理论与实验研究[J].建筑结构学报,2004,34(5):42-45.CHEN Zhi-hua,GUO Yun.Theoretical and experi men-tal research of prestress and dynamic performance ofsuspendome structure[J].Journal of Building Struc-tures,2004,34(5):42-45.
[7]陈志华,张立平.弦支穹顶结构实物动力特性研究[J].工程力学,2007,24(3):131-137.CHEN Zhi-hua,ZHANG Li-ping.Studies on dynamicproperties of real suspendome structure on site[J].Journal of Engineering Mechanics,2007,24(3):131-137.
[8]张明山.弦支穹顶结构的理论研究[D].杭州:浙江大学,2004.ZHANG Ming-shan.Theoretical Research on Suspendo-me[D].Hangzhou:Zhejiang University,2004.
[9]YUAN X F,CHEN L M,DONG S L.Prestress designof cable domes with newforms[J].Internation Journalof Solids&Structures,2007,44:2773?2782.
[10]KITIPORNCHAI S,KANG WJ,LAM HF.Factorsaffecting the design and construction of lamella suspen-dome systems[J].Journal of Constructional Steel Re-search,2005,61(6):764-785.
[11]沈祖炎,陈扬骥.网架与网壳[M].上海:同济大学出版社,1997.
[12]窦开亮.凯威特弦支穹顶结构的稳定性分析及静力试验研究[D].天津:天津大学,2004.DOU Kai-liang.Stability Analysis of Kiewitt Suspend-ome and Static Tests Researches of Suspendome[D].Tianjin:Tianjin University,2004.
[13]王勖成.有限单元法[M].北京:清华大学出版社,2003.
[14]尹德钰,刘善维,钱若军.网壳结构设计[M].北京:中国建筑工业出版社,1996.
[15]张重阳.弦支穹顶结构有限元分析研究[D].天津:天津大学,2003.ZHANG Chong-yang.Theoretical Analysis of Suspen-dome[D].Tianjin:Tianjin University,2003.
[16]MARORU KI,MASARU A,IKUOTATEMICHI.Design,test,and realization of“suspen-dome”system[J].Journal of IASS,1999,40(131):179-192.
[17]张志宏,张明山,董石麟.弦支穹顶结构动力分析[J].计算力学学报,2005,22(6):646-650.ZHANG Zhi-hong,ZHANG Ming-shan,DONG Shi-lin.Dynamic analysis of suspend-dome[J].ChineseJournal of Computational Mechanics,2005,22(6):646-650.
[2]李永梅,赵青英.Kiewitt型弦支穹顶结构动力稳定性研究[J].工业建筑,2009,(增刊):405-409.LI Yong-mei,ZHAO Qing-ying.Study on dynamic sta-bility of Kiewitt suspendome[J].Industrial Construc-tion,2009,(Supplement):405-409.
[3]张爱林,王冬梅.奥运会羽毛球馆弦支穹顶结构模型动力特性试验及理论分析[J].建筑结构学报,2008,28(6):68-75.ZHANG Ai-lin,WANG Dong-mei.Dynamic perform-ance experi ment and theoretical analysis on the suspend-dome structure model of the badminton gymnasiumfor2008 Olympic Games[J].Journal of Building Struc-tures,2008,28(6):68-75.
[4]康文江,陈志华.弦支穹顶结构体系的动力性能研究[J].工业建筑,2003,(增刊):577-582.KANG Wen-jiang,CHEN Zhi-hua.Study on the dy-namic performance of suspendome[J].Industrial Con-struction,2003,(Supplement):577-582.
[5]崔晓强,郭彦林.弦支穹顶结构的抗震性能研究[J].地震工程与工程振动,2005,25(1):67-75.CUI Xiao-qiang,GUO Yan-li.Seismic behaviors of sus-pen-dome structure[J].Journal of Earthquake Engineer-ing and Engineering Vibration,2005,25(1):67-75.
[6]陈志华,郭云.弦支穹顶结构预应力及动力性能理论与实验研究[J].建筑结构学报,2004,34(5):42-45.CHEN Zhi-hua,GUO Yun.Theoretical and experi men-tal research of prestress and dynamic performance ofsuspendome structure[J].Journal of Building Struc-tures,2004,34(5):42-45.
[7]陈志华,张立平.弦支穹顶结构实物动力特性研究[J].工程力学,2007,24(3):131-137.CHEN Zhi-hua,ZHANG Li-ping.Studies on dynamicproperties of real suspendome structure on site[J].Journal of Engineering Mechanics,2007,24(3):131-137.
[8]张明山.弦支穹顶结构的理论研究[D].杭州:浙江大学,2004.ZHANG Ming-shan.Theoretical Research on Suspendo-me[D].Hangzhou:Zhejiang University,2004.
[9]YUAN X F,CHEN L M,DONG S L.Prestress designof cable domes with newforms[J].Internation Journalof Solids&Structures,2007,44:2773?2782.
[10]KITIPORNCHAI S,KANG WJ,LAM HF.Factorsaffecting the design and construction of lamella suspen-dome systems[J].Journal of Constructional Steel Re-search,2005,61(6):764-785.
[11]沈祖炎,陈扬骥.网架与网壳[M].上海:同济大学出版社,1997.
[12]窦开亮.凯威特弦支穹顶结构的稳定性分析及静力试验研究[D].天津:天津大学,2004.DOU Kai-liang.Stability Analysis of Kiewitt Suspend-ome and Static Tests Researches of Suspendome[D].Tianjin:Tianjin University,2004.
[13]王勖成.有限单元法[M].北京:清华大学出版社,2003.
[14]尹德钰,刘善维,钱若军.网壳结构设计[M].北京:中国建筑工业出版社,1996.
[15]张重阳.弦支穹顶结构有限元分析研究[D].天津:天津大学,2003.ZHANG Chong-yang.Theoretical Analysis of Suspen-dome[D].Tianjin:Tianjin University,2003.
[16]MARORU KI,MASARU A,IKUOTATEMICHI.Design,test,and realization of“suspen-dome”system[J].Journal of IASS,1999,40(131):179-192.
[17]张志宏,张明山,董石麟.弦支穹顶结构动力分析[J].计算力学学报,2005,22(6):646-650.ZHANG Zhi-hong,ZHANG Ming-shan,DONG Shi-lin.Dynamic analysis of suspend-dome[J].ChineseJournal of Computational Mechanics,2005,22(6):646-650.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心