钢-混凝土组合框架强柱弱梁设计方法研究
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摘要
针对"5.12"汶川大地震中大多数钢筋混凝土框架结构出现了大量的柱铰破坏机制而不是梁铰破坏机制的问题,2010版抗震规范提高了框架结构强柱弱梁的柱端弯矩增大系数。对于常见的由钢管混凝土柱和钢-混凝土组合梁组成的组合框架结构,规范中没有给出相应的方法来实现强柱弱梁。根据组合框架的受力特点,采用Pushover分析方法,对组合梁-方钢管混凝土柱框架结构的破坏模式进行研究,讨论了柱和梁极限弯矩比与梁柱线刚度比对结构屈服机制的影响;结果表明,采用RC框架弹性内力调整的方法,不足以真正实现强柱弱梁的屈服机制。并初步建议了实现组合梁-钢管混凝土框架结构强柱弱梁的设计公式,为组合框架结构的设计提供参考。
In order to solve the problem that for general composite frame consisting of concrete-filled steel tubular(CFT) columns and steel-concrete composite beams(CB),the method to achieve strong column-weak beam behavior is not available in China code,GB 50011—2010,Pushover method was applied to study the damage mechanism of the CB-concrete-filled square steel tubular(CFST) column frame.The influence of ultimate moment ratio(column to beam) and beam-column line stiffness ratio on the structural yield mechanism was discussed.The analysis results showed that the method by adjusting the elastic inner force for RC frame can not give a guarantee to fulfill the strong column-weak beam yield mechanism.Furthermore the design formula to make sure the strong column-weak beam mechanism of CB-CFT column frames was preliminarily suggested,which could offer some valuable references in design of composite frame structures.
In order to solve the problem that for general composite frame consisting of concrete-filled steel tubular(CFT) columns and steel-concrete composite beams(CB),the method to achieve strong column-weak beam behavior is not available in China code,GB 50011—2010,Pushover method was applied to study the damage mechanism of the CB-concrete-filled square steel tubular(CFST) column frame.The influence of ultimate moment ratio(column to beam) and beam-column line stiffness ratio on the structural yield mechanism was discussed.The analysis results showed that the method by adjusting the elastic inner force for RC frame can not give a guarantee to fulfill the strong column-weak beam yield mechanism.Furthermore the design formula to make sure the strong column-weak beam mechanism of CB-CFT column frames was preliminarily suggested,which could offer some valuable references in design of composite frame structures.
引文
[1]Wang Yayong.Lessons learnt from building damages in theWenchuan earthquake—seismic concept design of buildings[J].Journal of Building Structures,2008,29(4):20-25.[王亚勇.汶川地震建筑震害启示——抗震概念设计[J].建筑结构学报,2008,29(4):20-25.]
[2]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[3]Nie Jianguo,Huang Yuan,Fan Jiansheng.Experimental stud-y on load-bearing behavior of rectangular CFST frame con-sidering composite action of floor slab[J].Journal of Build-ing Structures,2011,32(3):99-108.[聂建国,黄远,樊健生.考虑楼板组合作用的方钢管混凝土组合框架受力性能试验研究[J].建筑结构学报,2011,32(3):99-108.]
[4]Nakashima M,Matsumiya T,Suita K,et al.Full scale test ofcomposite frame under large cyclic loading[J].Journal ofStructural Engineering,ASCE,2007,133(2):297-304.
[5]Chu Liusheng,Gao Danying,Zhao Gengqi.Study on‘StrongColumn-Weak Beam’failure mode of composite frame com-posed of SRC columns and steel beams[J].Journal ofZhengzhou University:Engineering Science,2009,30(4):26-29.[楚留声,高丹盈,赵更歧.SRC柱-钢梁组合框架“强柱弱梁”破坏机制研究[J].郑州大学学报:工学版,2009,30(4):26-29.]
[6]Zhang Jicheng,Shen Zuyan,Lin Zhengyu,et al.Experimentalresearch on seismic behavior of concrete-filled L-sectionsteel tubular frames[J].Journal of Building Structures,2010,31(8):1-7.[张继承,沈祖炎,林震宇,等.L形钢管混凝土框架结构抗震性能试验研究[J].建筑结构学报,2010,31(8):1-7.]
[7]Liu Jingbo,Liu Yangbing,Guo Bing.Seismic behavior analy-sis of steel-concrete composite frame structure system[J].Journal of Beijing University of Technology,2010,36(7):934-941.[刘晶波,刘阳冰,郭冰.钢-混凝土组合框架结构体系抗震性能研究[J].北京工业大学学报,2010,36(7):934-941.]
[8]Ye Lieping,Ma Qianli,Miao Zhiwei.Study on weak beam-strong column design method of RC frame structures[J].Engineering Mechanics,2010,27(12):102-113.[叶列平,马千里,缪志伟.钢筋混凝土框架结构强柱弱梁设计方法的研究[J].工程力学,2010,27(12):102-113.]
[9]Han Jun,Li Yingmin,Ji Shuyan.Realization of rational fail-ure mechanism for the RC frame structure[J].Journal ofHarbin Institute of Technology,2010,42(12):2003-2008.[韩军,李英民,姬淑艳.RC框架结构合理破坏机制的实现[J].哈尔滨工业大学学报,2010,42(12):2003-2008.]
[10]Guan Minsheng,Du Hongbiao,Han Dajian.Pushover analy-sis on rectangular column frames with different column-to-beam strength ratios[J].Building Structure,2009,39(4):15-16.[管民生,杜宏彪,韩大建.RC矩形柱框架结构不同柱-梁抗弯强度比的Pushover分析[J].建筑结构,2009,39(4):15-16.]
[11]Dooley K L,Bracci J M.Seismic evaluation of column-to-beam strength ratios in reinforced concrete frames[J].ACIStructural Journal,2001,98(6):843-851.
[12]Liu Yangbing,Liu Jingbo,Han Qiang,et al.A simplifiedapproach to define the yield surface of concrete-filled squaresteel tubes subjected to compression-bending[J].Journal ofChongqing University,2010,33(10):70-75.[刘阳冰,刘晶波,韩强,等.方钢管混凝土压弯构件塑性屈服面的简化确定方法[J].重庆大学学报,2010,33(10):70-75.]
[2]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[3]Nie Jianguo,Huang Yuan,Fan Jiansheng.Experimental stud-y on load-bearing behavior of rectangular CFST frame con-sidering composite action of floor slab[J].Journal of Build-ing Structures,2011,32(3):99-108.[聂建国,黄远,樊健生.考虑楼板组合作用的方钢管混凝土组合框架受力性能试验研究[J].建筑结构学报,2011,32(3):99-108.]
[4]Nakashima M,Matsumiya T,Suita K,et al.Full scale test ofcomposite frame under large cyclic loading[J].Journal ofStructural Engineering,ASCE,2007,133(2):297-304.
[5]Chu Liusheng,Gao Danying,Zhao Gengqi.Study on‘StrongColumn-Weak Beam’failure mode of composite frame com-posed of SRC columns and steel beams[J].Journal ofZhengzhou University:Engineering Science,2009,30(4):26-29.[楚留声,高丹盈,赵更歧.SRC柱-钢梁组合框架“强柱弱梁”破坏机制研究[J].郑州大学学报:工学版,2009,30(4):26-29.]
[6]Zhang Jicheng,Shen Zuyan,Lin Zhengyu,et al.Experimentalresearch on seismic behavior of concrete-filled L-sectionsteel tubular frames[J].Journal of Building Structures,2010,31(8):1-7.[张继承,沈祖炎,林震宇,等.L形钢管混凝土框架结构抗震性能试验研究[J].建筑结构学报,2010,31(8):1-7.]
[7]Liu Jingbo,Liu Yangbing,Guo Bing.Seismic behavior analy-sis of steel-concrete composite frame structure system[J].Journal of Beijing University of Technology,2010,36(7):934-941.[刘晶波,刘阳冰,郭冰.钢-混凝土组合框架结构体系抗震性能研究[J].北京工业大学学报,2010,36(7):934-941.]
[8]Ye Lieping,Ma Qianli,Miao Zhiwei.Study on weak beam-strong column design method of RC frame structures[J].Engineering Mechanics,2010,27(12):102-113.[叶列平,马千里,缪志伟.钢筋混凝土框架结构强柱弱梁设计方法的研究[J].工程力学,2010,27(12):102-113.]
[9]Han Jun,Li Yingmin,Ji Shuyan.Realization of rational fail-ure mechanism for the RC frame structure[J].Journal ofHarbin Institute of Technology,2010,42(12):2003-2008.[韩军,李英民,姬淑艳.RC框架结构合理破坏机制的实现[J].哈尔滨工业大学学报,2010,42(12):2003-2008.]
[10]Guan Minsheng,Du Hongbiao,Han Dajian.Pushover analy-sis on rectangular column frames with different column-to-beam strength ratios[J].Building Structure,2009,39(4):15-16.[管民生,杜宏彪,韩大建.RC矩形柱框架结构不同柱-梁抗弯强度比的Pushover分析[J].建筑结构,2009,39(4):15-16.]
[11]Dooley K L,Bracci J M.Seismic evaluation of column-to-beam strength ratios in reinforced concrete frames[J].ACIStructural Journal,2001,98(6):843-851.
[12]Liu Yangbing,Liu Jingbo,Han Qiang,et al.A simplifiedapproach to define the yield surface of concrete-filled squaresteel tubes subjected to compression-bending[J].Journal ofChongqing University,2010,33(10):70-75.[刘阳冰,刘晶波,韩强,等.方钢管混凝土压弯构件塑性屈服面的简化确定方法[J].重庆大学学报,2010,33(10):70-75.]
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