高层组合框架-混凝土筒体结构推覆分析
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摘要
针对高层混合结构中适用于推覆分析的剪力墙单元与型钢混凝土构件塑性铰等问题进行研究,利用三垂直杆元模拟剪力墙,各杆元分别考虑剪力墙轴向、剪切与弯曲变形;根据型钢混凝土构件截面承载力与变形能力,给出了反映截面弯矩与转角关系的型钢混凝土构件塑性铰特性值计算方法;应用MIDAS/GEN软件作为弹塑性分析工具,采用改进的剪力墙单元模型,自定义型钢混凝土构件塑性铰特性值,对30层高混合结构进行推覆分析,并与模型试验结果对比,结果表明:推覆分析所得基底剪力-顶点位移曲线与试验结果较符合,各构件塑性铰分布及状态与模型试验的裂缝分布及破坏模式符合较好,能够反映出混合结构各构件变形和结构整体承载力变化过程.
The shear wall element model suitable for push-over analysis and the constitutive relationship for plastic hinge of steel reinforced concrete members were both studied.The three vertical truss element models were used to simulate shear wall,in which axial,shear and bend deformations are considered.The method specifying the plastic hinge property for reflecting relationship between moment and rotation of steel reinforced concrete beams was proposed.The push-over analysis for a 30-story hybrid structure was carried out by the MIDAS/GEN software where three vertical truss element models were used for simulation shear walls,the plastic hinge property of steel reinforced concrete beams were defined by user.The comparison between the test results with push-over analysis for the model structure shows that the base shear-top displacement curve from push-over analysis is in good agreement with the experimental results,and the distribution and states of plastic hinge are consistent with the distribution and failure modes of crack in test,the deformation of members and bearing capacity of hybrid structure can be reflected by the push-over analysis.
The shear wall element model suitable for push-over analysis and the constitutive relationship for plastic hinge of steel reinforced concrete members were both studied.The three vertical truss element models were used to simulate shear wall,in which axial,shear and bend deformations are considered.The method specifying the plastic hinge property for reflecting relationship between moment and rotation of steel reinforced concrete beams was proposed.The push-over analysis for a 30-story hybrid structure was carried out by the MIDAS/GEN software where three vertical truss element models were used for simulation shear walls,the plastic hinge property of steel reinforced concrete beams were defined by user.The comparison between the test results with push-over analysis for the model structure shows that the base shear-top displacement curve from push-over analysis is in good agreement with the experimental results,and the distribution and states of plastic hinge are consistent with the distribution and failure modes of crack in test,the deformation of members and bearing capacity of hybrid structure can be reflected by the push-over analysis.
引文
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[14]徐培福,薛彦涛,肖从真,等.高层型钢混凝土框筒混合结构抗震性能试验研究[J].建筑结构,2005,35(5):3-8.
[15]薛彦涛.带转换层型钢混凝土框架-核心筒混合结构试验与设计研究[D].中国建筑科学研究院,2006.
[2]徐培福,王翠坤,肖从真.中国高层建筑结构发展与展望[J].建筑结构,2009,39(9):28-32.
[3]Applied Technology Council.Seismic evaluation andretrofit of concrete buildings,ATC-40[R].RedwoodCity:ATC,1996.
[4]Federal Emergency Management Agency.FEMA-356.prestandard and commentary for the seismic re-habilitation of buildings[S].Washington:[s.n.],2000.
[5]北京迈达斯技术有限公司.MIADS/GEN分析与设计原理[DB/CD].北京:北京迈达斯技术有限公司,2006.
[6]汪梦甫,周锡元.钢筋混凝土剪力墙多垂直杆非线性单元模型的改进及其应用[J].建筑结构学报,2002,23(1):38-42.
[7]贺国京,阎奇武,袁锦根.工程结构弹塑性地震反应[M].北京:中国铁道出版社,2005:56-100.
[8]楚留声.高烈度区型钢混凝土框架-钢筋混凝土筒体混合结构体系抗震性能研究[D].西安建筑科技大学建筑与土木工程学院,2008.
[9]孙景江,江近仁.框架-剪力墙型结构的非线性随机地震反应和可靠性分析[J].地震工程与工程振动,1992,12(2):59-68.
[10]杨勇,郭子雄,杜培龙,等.核心型钢混凝土柱截面非线性分析及抗震设计研究[J].基建优化,2005,26(5):110-117.
[11]赵鸿铁.钢与混凝土组合结构[M].北京:科学出版社,2001.
[12]刘维亚,张兴武,姜维山,等.型钢混凝土组合结构构造与计算手册[M].北京:中国建筑工业出版社,2004.
[13]中华人民共和国行业标准.JGJ138─2001型钢混凝土组合结构技术规程[S].北京:中国建筑工业出版社,2001.
[14]徐培福,薛彦涛,肖从真,等.高层型钢混凝土框筒混合结构抗震性能试验研究[J].建筑结构,2005,35(5):3-8.
[15]薛彦涛.带转换层型钢混凝土框架-核心筒混合结构试验与设计研究[D].中国建筑科学研究院,2006.
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