建筑结构

2013, v.43;No.349(01) 48-53

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Z形截面柱延性性能及轴压比限值研究
Research on limited value of axial compression ratio and performance of ductility for Z-shaped RC columns

王启文;许贻懂;陈云霞;
Wang Qiwen1,Xu Yidong1,Chen Yunxia2(1 Shenzhen General Institute of Architectural Design and Research Co.,Ltd.,Shenzhen 518031,China; 2 School of Civil Engineering,Tianjin University,Tianjin 300072,China)

摘要(Abstract):

为了配合《混凝土异形柱结构技术规程》(JGJ 149—2006)修订增设Z形截面柱的相关规定,对34 616根Z形柱的延性进行了非线性有限元计算分析,研究了弯矩作用方向角、轴压比、截面肢长比及箍筋的配置等因素对Z形柱的截面曲率延性的影响,分析得到其延性变化规律。通过对Z形柱截面曲率延性进行回归分析,得到其设计轴压比与配箍特征值的关系,进而得到Z形截面柱的轴压比限值及箍筋加密区的最小配箍特征值的要求。
In order to add correlative regulation of Z-shaped column for revising Technical specification for concrete structures with specially shaped column(JGJ 149—2006),ductilities of 34 616 Z-shaped columns were calculated and analyzed by nonlinear-finite element method.Many relevant factors,including action direction angle of bending moment,axial compression ratio,length ratio of two legs of inequiaxial Z-shaped column and scheme of lateral reinforcement etc.,were analyzed,and its section curvature ductility behaviors were summarized.On the base of regression analysis for the section curvature ductility of Z-shaped columns,the designed value of axial compression ratio was obtained in relation with characteristic value for providing stirrup or hoop.Then the limited value of axial compression ratio and minimum characteristic value for providing stirrup or hoop in densified zone of Z-shaped columns were obtained.

关键词(KeyWords): Z形截面柱;延性;轴压比限值;配箍特征值
Z-shaped column;ductility;limited value of axial compression ratio;characteristic value for providing stirrup or hoop

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作者(Author): 王启文;许贻懂;陈云霞;
Wang Qiwen1,Xu Yidong1,Chen Yunxia2(1 Shenzhen General Institute of Architectural Design and Research Co.,Ltd.,Shenzhen 518031,China; 2 School of Civil Engineering,Tianjin University,Tianjin 300072,China)

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DOI: 10.19701/j.jzjg.2013.01.012

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