钢筋混凝土结构的静力弹塑性分析
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摘要
通过SAP2000结构计算程序采用均匀分布和倒三角分布方式加载对上部内收的八层三维框架结构进行多遇地震和罕遇地震下的Pushover分析,并对Pushover分析结果与时程分析结果进行了比较。结果表明,对上部内收的框架结构,倒三角分布加载进行Pushover分析得到的推覆曲线与均匀分布加载得到的推覆曲线差别较大;多遇地震下,Pushover分析得到的性能点状态时的楼层侧移小于反映谱分析结果和线弹性时程分析结果的平均值,层间位移角小于反映谱分析和线性时程分析,结构未出现塑性铰;罕遇地震下,Pushover分析得到的性能点状态时的楼层侧移和层间位移角均与弹塑性时程分析结果的平均值较为接近,结构仅在塑性铰区出现塑性变形。
Pushover analysis of 8-storied frame structure was performed in the way of uniform distribution and inverted triangular loading by using SAP2000.Results of pushover analysis and time-history analysis were compared.It’s concluded that results’ difference of pushover analysis performed by uniform distribution and inverted triangular loading is obvious for irregular frame structure.Under frequent earthquake,results of pushover analysis are less than those of response spectrum analysis and linear elastic time-history analysis;The building structure doesn’t appear plastic hinge.Under rare earthquake,results of pushover analysis is closer to average results of nonlinear time history analysis;The building structure appears plastic deformation only in the plastic hinge zone.
Pushover analysis of 8-storied frame structure was performed in the way of uniform distribution and inverted triangular loading by using SAP2000.Results of pushover analysis and time-history analysis were compared.It’s concluded that results’ difference of pushover analysis performed by uniform distribution and inverted triangular loading is obvious for irregular frame structure.Under frequent earthquake,results of pushover analysis are less than those of response spectrum analysis and linear elastic time-history analysis;The building structure doesn’t appear plastic hinge.Under rare earthquake,results of pushover analysis is closer to average results of nonlinear time history analysis;The building structure appears plastic deformation only in the plastic hinge zone.
引文
[1]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2008.
[2]JGJ3-2002,高层建筑混凝土技术规程[S].北京:中国建筑工业出版社,2002.
[3]北京金土木软件有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[4]缪志伟,马千里,叶列平,路新征.Pushover方法的适用性和准确性研究[J].工程抗震与加固改造,2008,30(1):55-59.
[5]ATC,“Seismic Evaluation and Retrofit of Concrete Building”[R].ReportNo.ATC-40.Applied Technology Council,Redwood City,California,1996.
[6]FEMA,“NEHRP Guidelines for the Seismic Rehabilitation ofBuilding”[R].FEMA-273,Washington D.C.,1997.
[7]汪大绥,贺军利,芮明倬.静力弹塑性分析中若干问题的研究与探讨[J].建筑结构,2007,37(5):96-99.
[8]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.
[2]JGJ3-2002,高层建筑混凝土技术规程[S].北京:中国建筑工业出版社,2002.
[3]北京金土木软件有限公司,中国建筑标准设计研究院.SAP2000中文版使用指南[M].北京:人民交通出版社,2006.
[4]缪志伟,马千里,叶列平,路新征.Pushover方法的适用性和准确性研究[J].工程抗震与加固改造,2008,30(1):55-59.
[5]ATC,“Seismic Evaluation and Retrofit of Concrete Building”[R].ReportNo.ATC-40.Applied Technology Council,Redwood City,California,1996.
[6]FEMA,“NEHRP Guidelines for the Seismic Rehabilitation ofBuilding”[R].FEMA-273,Washington D.C.,1997.
[7]汪大绥,贺军利,芮明倬.静力弹塑性分析中若干问题的研究与探讨[J].建筑结构,2007,37(5):96-99.
[8]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.
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