大型电压发生器塔架结构抗震抗风性能分析
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摘要
本文应用ANSYS有限元软件建立某大型直流电压发生器塔架结构的有限元分析模型,分别计算结构在正弦共振调幅五波、正弦共振三波、Taft地震波、El-Centro地震波和云南澜沧地震波5种地震动激励下的响应,以及结构在10m/s和35m/s两种风荷载工况下的响应。并按规范要求将上面两种计算结果与结构自身重力进行组合,计算结构在地震与风的共同作用下的安全系数。计算结果表明,对于该结构体系,地震作用要远大于风的作用,而在5种地震波中,正弦共振三波五波产生的地震反应要大于其它3种实测地震波产生的反应。
A finite element model of DC voltage generator tower structure was established via the application of the finite element software ANSYS and the separate incentive responses under five amplitude modulation sine waves,Taft earthquake wave,El-Centro seismic wave,Yunnan Lancang seismic waves and three sine waves,were calculated by using this model as well as the responses under two types of wind load (10m/s and 35m/s) inputs.The results of the two above calculations with the factor of structure′s self gravity in conformity with the standard requirements were integrated and the interaction of seismic waves and wind load was calculated in the paper.Results indicate:for this structural system,the action of seismic waves is much greater than that of the wind;among the five types of seismic waves,the seismic response of five amplitude modulation sine waves and three sine waves are far more than the responses of the other three observed seismic waves.
A finite element model of DC voltage generator tower structure was established via the application of the finite element software ANSYS and the separate incentive responses under five amplitude modulation sine waves,Taft earthquake wave,El-Centro seismic wave,Yunnan Lancang seismic waves and three sine waves,were calculated by using this model as well as the responses under two types of wind load (10m/s and 35m/s) inputs.The results of the two above calculations with the factor of structure′s self gravity in conformity with the standard requirements were integrated and the interaction of seismic waves and wind load was calculated in the paper.Results indicate:for this structural system,the action of seismic waves is much greater than that of the wind;among the five types of seismic waves,the seismic response of five amplitude modulation sine waves and three sine waves are far more than the responses of the other three observed seismic waves.
引文
[1]同济大学土木工程防灾国家重点实验室.汶川地震震害[M].上海:同济大学出版社,2008
[2]王锡凡.现代电力系统分析[M].北京:科学出版社,2003
[3](美)R.W.克拉夫,J.彭金著,王光远译.结构动力学.北京:科学出版社,1981
[4]楼梦麟,陈群丽.考虑提离滑移的电压发生器塔架结构地震反应分析.地震工程与工程振动,1999,19(1)∶164-171
[5]中华人民共和国国家标准.《建筑结构荷载规范》(GB50009-2001).北京:中国建筑工业出版社,2001
[6]中华人民共和国国家标准.《电力设施抗震设计规范》(GB50260-96).北京:中国计划出版社,1996
[7]谢礼立,翟长海.最不利设计地震动研究.地震学报,2003,6(3):11-15
[8]贺晓晖、楼梦麟.大型特高压直流发生器结构地震时程反应分析.结构工程师,2008,24(6):100-106
[9]楼梦麟,潘曦.电容器双塔结构地震反应分析.结构工程师,2009,25(6):84-88
[2]王锡凡.现代电力系统分析[M].北京:科学出版社,2003
[3](美)R.W.克拉夫,J.彭金著,王光远译.结构动力学.北京:科学出版社,1981
[4]楼梦麟,陈群丽.考虑提离滑移的电压发生器塔架结构地震反应分析.地震工程与工程振动,1999,19(1)∶164-171
[5]中华人民共和国国家标准.《建筑结构荷载规范》(GB50009-2001).北京:中国建筑工业出版社,2001
[6]中华人民共和国国家标准.《电力设施抗震设计规范》(GB50260-96).北京:中国计划出版社,1996
[7]谢礼立,翟长海.最不利设计地震动研究.地震学报,2003,6(3):11-15
[8]贺晓晖、楼梦麟.大型特高压直流发生器结构地震时程反应分析.结构工程师,2008,24(6):100-106
[9]楼梦麟,潘曦.电容器双塔结构地震反应分析.结构工程师,2009,25(6):84-88
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