基于振型的Pushover方法的研究与实例
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摘要
振型和频率仅与质量和刚度有关,由结构外形唯一确定,故称之为特征参量。振型为结构位移的完备正交基,基于振型加载模式的Pushover方法较其他方法更加合理。采用结构质量参与系数控制振型参与计算数量,振型数有了量化标准,使精度满足安全需要。最后通过实例阐述多模态自适应Pushover方法的实施过程。
Mode and frequency are only related with mass and stiffness,which are decided by structure shape.So the mode and frequency are also called character parameters.Because mode is self-contained orthotropic matrix,loading based on it is more rational than other loading method.Mass participating ratio is utilized to control the quantization mode number.As a result,calculating mode has measurement criteria,and the precision meets the safety demand.At last,an engineering example is employed to illustrate the multiple mode adaptive pushover method.
Mode and frequency are only related with mass and stiffness,which are decided by structure shape.So the mode and frequency are also called character parameters.Because mode is self-contained orthotropic matrix,loading based on it is more rational than other loading method.Mass participating ratio is utilized to control the quantization mode number.As a result,calculating mode has measurement criteria,and the precision meets the safety demand.At last,an engineering example is employed to illustrate the multiple mode adaptive pushover method.
引文
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[15]邓军,唐家祥.时程分析法输入地震记录的选择与实例[J].工业建筑,2000,30(8):9～12.
[2]George M Lioyd,Ming.L.Wang,Varsha Singh.ObservedVibrations of Mode Frequencies of a Prestressed Concrete Bridgewith Temperature[J].Condition Monitoring of Material andStructures,2001:179～189.
[3]杨溥,李英民,王亚勇,等.结构静力弹塑性分析(push-over)方法的改进[J].建筑结构学报,2002,21(1):44～50.
[4]侯爽,欧进萍.结构pushover分析的侧向力分布及高阶振型影响[J].地震工程与工程振动,2004,24(3):89～97.
[5]魏巍,冯启明.几种pushover分析方法对比研究[J].地震工程与工程振动,2002,22(4):66～73.
[6]Antoniou S.,Rovithakis A,Pinho R.Development andverification of a fully adaptive pushover procedure[J].Proceedings of the Twelfth European Conference on EarthquakeEngineering,London,UK,2002:822～830.
[7]Antoniou S,Pinho R.Advantages and Limitations of Force-basedAdaptive and Non-Adaptive Pushover Procedures[J].Journal ofEarthquake Engineering,2004,8(4):497～522.
[8]Antoniou S,Pinho R.Development and Verification of aDisplacement-based Adaptive Pushover Procedure[J].Journalof Earthquake Engineering,2004,8(5):643～661.
[9]谢官模.振动力学[M].北京:国防工业出版社,2007,P139～143.
[10]王克海,李茜.基于模态分析的pushover方法在桥梁抗震分析中的应用[J].铁道学报,2006,28(2):79～84.
[11]王克海,季金文,叶英华.静力弹塑性分析(pushover Analysis)在多跨简支桥梁中的应用[J].世界地震工程,2008,24(1):132～136.
[12]杨成,赵世春,赵人达,等.地震作用特征对结构IDA曲线的影响分析[J].四川大学学报(工程科学版),2010,42(2):93～99.
[13]陆新征,叶烈平.基于IDA分析的结构抗地震倒塌能力研究[J].工程抗震与加固改造,2010,32(1):13～18.
[14]杨成,徐腾飞,李英明,等.应用弹塑性反应谱对IDA方法的改进研究[J].地震工程与工程震动,2008,28(4):64～69.
[15]邓军,唐家祥.时程分析法输入地震记录的选择与实例[J].工业建筑,2000,30(8):9～12.
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