钢管混凝土组合框架弹塑性层间位移计算方法
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摘要
基于位移的抗震设计方法是结构基于性能化抗震设计的重要方法之一,它可直观反映结构的具体性能目标。在基于位移的抗震设计中如何确定框架的层间位移与构件变形之间的关系至关重要。本文用典型框架节来等效该层框架,将框架层间位移转化为框架节的侧移,通过引入塑性变形分布因子λp的概念,建立了λp与位移延性系数μδ、强柱系数ηc之间的关系,即λp-μδ-ηc关系,得出框架节的侧移分布规则,从而求解钢管混凝土框架的弹塑性层间位移,为该类结构基于位移的抗震设计中位移的计算提供了参考。
The theory of displacement-based seismic design(PBSD) is key issue in the modern earthquake engineering research.It can present the specific performance objective of the structure.It is important to define the relations between the elastic-plastic inter-story drift of frame and the deformation of members.The story drift can be represented by the drift of a typical beam/column sub-assemblage in this paper.With the plastic deformation influence factor λp as a parameter,the relations among λp,displacement ductility ratio μδ,and column overstrength factor ηc,namely λp-μδ-ηcequations,are presented.Furthermore,the rules of drift decomposition are developed so that elastic-plastic story drift of CFST frame can be gained.It can provide reference to displacement calculation of the CFST structure in the displacement-based seismic design.
The theory of displacement-based seismic design(PBSD) is key issue in the modern earthquake engineering research.It can present the specific performance objective of the structure.It is important to define the relations between the elastic-plastic inter-story drift of frame and the deformation of members.The story drift can be represented by the drift of a typical beam/column sub-assemblage in this paper.With the plastic deformation influence factor λp as a parameter,the relations among λp,displacement ductility ratio μδ,and column overstrength factor ηc,namely λp-μδ-ηcequations,are presented.Furthermore,the rules of drift decomposition are developed so that elastic-plastic story drift of CFST frame can be gained.It can provide reference to displacement calculation of the CFST structure in the displacement-based seismic design.
引文
[1]罗文斌,钱稼茹.钢筋混凝土框架基于位移的抗震设计[J].土木工程学报,2003,36(5):22～29Luo Wen-bin,Qian Jia-ru.Displacement-based seismicdesign for RC frames[J].China Civil EngineeringJournal,2003,36(5):22～29(in Chinese)
[2]梁兴文,黄雅捷,杨其伟.钢筋混凝土框架结构基于位移的抗震设计方法研究[J].土木工程学报,2005,38(9):53～60Liang Xing-wen,Huang Ya-jie,Yang Qi-wei.Displacement-based seismic design method of rc frames[J].China Civil Engineering Journal,2005,38(9):53～60(in Chinese)
[3]龚胡广,沈蒲生.一种基于位移的改进静力弹塑性分析方法[J].地震工程与工程振动,2005,25(3):18～23Gong Hu-guang,Shen Pu-sheng.An improved nonlinearstatic analysis based on displacement[J].EarthquakeEngineering and Engineering Vibration,2005,25(3):18～23(in Chinese)
[4]钱稼茹,徐福江.钢筋混凝土柱基于位移的变形能力设计方法[J].建筑结构,2007,37(12):30～32Qian Jia-ru,Xu Fu-jiang.Displacement-baseddeformation capacity design of RC columns[J].Building Structure,2007,37(12):30～32(inChinese)
[5]门进杰,史庆轩,周琦.框架结构基于性能的抗震设防目标和性能指标的量化[J].土木工程学报,2008,41(9):76～82Men Jin-jie,Shi Qing-xuan,Zhou Qi.Performance-based seismic fortification criterion and quantifiedperformance index for reinforced concrete framestructures[J].China Civil Engineering Journal,2008,41(9):76～82(in Chinese)
[6]王文达,夏秀丽,史艳莉.钢管混凝土框架基于性能的抗震设计探讨[J].工程抗震与加固改造,2010,32(2):96～102Wang Wen-da,Xia Xiu-li,Shi Yan-li.Discussion ofperformance-based seismic design for concrete-filledsteel tubular frame[J].Earthquake ResistantEngineering and Retrofitting,2010,32(2):96～102(in Chinese)
[7]蒋丽忠,唐斌,谭丽芳.钢-混凝土组合框架抗震目标位移的计算方法分析[J].工程抗震与加固改造,2009,31(3):73～77Jiang Li-zhong,Tang Bin,Tan Li-fang.Analysis of theseismic target displacement calculating method of steel-concrete composite frame structure[J].EarthquakeResistant Engineering and Retrofitting,2009,31(3):73～77(in Chinese)
[8]罗文斌,钱稼茹.RC框架弹塑性位移的解构规则与构件的目标侧移角[J].工程力学,2003,20(5):32～36Luo Wen-bin,Qian Jia-ru.Rules of elastoplastic driftdecomposition of RC frames and the target drift ofmembers[J].Engineering Mechanics,2003,20(5):32～36(in Chinese)
[9]韩林海,杨有福.现代钢管混凝土结构技术(第二版)[M].北京:中国建筑工业出版社,2007Han Lin-hai,Yang You-fu.Modern Concrete-filledSteel Tubular Structure Technique(second edition)[M].Beijing:China Construction Industry Press,2007(in Chinese)
[10]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2008GB50011-2001,Code for Seismic Design of Building[S].Beijing:China Construction Industry Press,2008(in Chinese)
[2]梁兴文,黄雅捷,杨其伟.钢筋混凝土框架结构基于位移的抗震设计方法研究[J].土木工程学报,2005,38(9):53～60Liang Xing-wen,Huang Ya-jie,Yang Qi-wei.Displacement-based seismic design method of rc frames[J].China Civil Engineering Journal,2005,38(9):53～60(in Chinese)
[3]龚胡广,沈蒲生.一种基于位移的改进静力弹塑性分析方法[J].地震工程与工程振动,2005,25(3):18～23Gong Hu-guang,Shen Pu-sheng.An improved nonlinearstatic analysis based on displacement[J].EarthquakeEngineering and Engineering Vibration,2005,25(3):18～23(in Chinese)
[4]钱稼茹,徐福江.钢筋混凝土柱基于位移的变形能力设计方法[J].建筑结构,2007,37(12):30～32Qian Jia-ru,Xu Fu-jiang.Displacement-baseddeformation capacity design of RC columns[J].Building Structure,2007,37(12):30～32(inChinese)
[5]门进杰,史庆轩,周琦.框架结构基于性能的抗震设防目标和性能指标的量化[J].土木工程学报,2008,41(9):76～82Men Jin-jie,Shi Qing-xuan,Zhou Qi.Performance-based seismic fortification criterion and quantifiedperformance index for reinforced concrete framestructures[J].China Civil Engineering Journal,2008,41(9):76～82(in Chinese)
[6]王文达,夏秀丽,史艳莉.钢管混凝土框架基于性能的抗震设计探讨[J].工程抗震与加固改造,2010,32(2):96～102Wang Wen-da,Xia Xiu-li,Shi Yan-li.Discussion ofperformance-based seismic design for concrete-filledsteel tubular frame[J].Earthquake ResistantEngineering and Retrofitting,2010,32(2):96～102(in Chinese)
[7]蒋丽忠,唐斌,谭丽芳.钢-混凝土组合框架抗震目标位移的计算方法分析[J].工程抗震与加固改造,2009,31(3):73～77Jiang Li-zhong,Tang Bin,Tan Li-fang.Analysis of theseismic target displacement calculating method of steel-concrete composite frame structure[J].EarthquakeResistant Engineering and Retrofitting,2009,31(3):73～77(in Chinese)
[8]罗文斌,钱稼茹.RC框架弹塑性位移的解构规则与构件的目标侧移角[J].工程力学,2003,20(5):32～36Luo Wen-bin,Qian Jia-ru.Rules of elastoplastic driftdecomposition of RC frames and the target drift ofmembers[J].Engineering Mechanics,2003,20(5):32～36(in Chinese)
[9]韩林海,杨有福.现代钢管混凝土结构技术(第二版)[M].北京:中国建筑工业出版社,2007Han Lin-hai,Yang You-fu.Modern Concrete-filledSteel Tubular Structure Technique(second edition)[M].Beijing:China Construction Industry Press,2007(in Chinese)
[10]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2008GB50011-2001,Code for Seismic Design of Building[S].Beijing:China Construction Industry Press,2008(in Chinese)
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