现浇楼板配筋对梁负弯矩区受力性能的影响
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摘要
框架结构的现浇楼板配筋会参与梁负弯矩区的受力,合理确定楼板配筋对梁负弯矩区受力的影响,对确保强柱弱梁抗震概念设计具有重要意义。建立某单层框架的精细化有限元软件模型,利用损伤塑性本构模型模拟混凝土材料的非线性,分析竖向荷载和水平荷载作用下现浇楼板配筋对梁负弯矩区受力的影响,并给出楼板配筋参与梁负弯矩区受力的有效宽度。分析表明:现浇楼板配筋参与框架梁受力随荷载和框架梁位置不同而有所差异;弹塑性状态下楼板钢筋参与框架梁负弯矩区受力较弹性状态下大;为保证框架设计的强柱弱梁概念设计,应合理考虑现浇楼板钢筋参与梁负弯矩区受力。
It is essential to consider monolithic slab reinforcement action on negative flexural strength of beams when seismic concept design of "strong column weak beam " should be satisfied.One story frame structure model is established,and damage plasticity model for concrete is adopt to consider concrete nonlinear.Influence of monolithic slab reinforcement on negative flexural strength of beams is analyzed under horiztial and vertical load respectively,and effective flange width is obtained.The results indicate that: the influence of monolithic slab reinforcement on negative flexural strength of beams is changed with load and beam location.Influence of monolithic slab reinforcement on negative flexural strength of beams when frame structure under plastic is larger than elastic condition.Influence of monolithic slab reinforcement on negative flexural strength of beams should be considered to ensure seismic concept design of "strong column weak beam".
It is essential to consider monolithic slab reinforcement action on negative flexural strength of beams when seismic concept design of "strong column weak beam " should be satisfied.One story frame structure model is established,and damage plasticity model for concrete is adopt to consider concrete nonlinear.Influence of monolithic slab reinforcement on negative flexural strength of beams is analyzed under horiztial and vertical load respectively,and effective flange width is obtained.The results indicate that: the influence of monolithic slab reinforcement on negative flexural strength of beams is changed with load and beam location.Influence of monolithic slab reinforcement on negative flexural strength of beams when frame structure under plastic is larger than elastic condition.Influence of monolithic slab reinforcement on negative flexural strength of beams should be considered to ensure seismic concept design of "strong column weak beam".
引文
[1]叶列平,曲哲,马千里,等.从汶川地震框架结构震害谈“强柱弱梁”屈服机制的实现[J].建筑结构,2008,38(11):52-59(Ye Lieping,Qu Zhe,Ma Qianli,et al.Study on ensuring the strong column-week beam mechanismfor RC frames based on the damage analysis in theWenchuan earthquake[J].Building Structure,2008,38(11):52-59(in Chinese))
[2]GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011(GB 50010—2010 Code for designof concrete structures[S].Beijing:China Architecture andBuilding Press,2011(in Chinese))
[3]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2011(GB 50011—2010 Code for seismicdesign of building structures[S].Beijing:ChinaArchitecture and Building Press,2011(in Chinese))
[4]NZS3101 Concrete structures standard[S].New ZealandStandards Council,2006
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[6]吴勇,雷汲川,杨红,等.板筋参与梁端负弯矩承载力问题的探讨[J].重庆建筑大学学报,2002,24(3):33-37(Wu Yong,Lei Jichuan,Yang Hong,et al.Discussion onnegative flexural strength of beams including slabs[J].Journal of Chongqing Jianzhu University,2002,24(3):33-37(in Chinese))
[7]管民生,杜宏彪.现浇楼板参与工作后框架结构的pushover分析研究[J].地震工程与工程振动,2005,25(5):117-123(Guan Minsheng,Du Hongbiao.Pushoveranalysis of effect of casting slab on RC frame structure[J].Earthquake Engineering and Engineering Vibration,2005,25(5):117-123(in Chinese))
[8]王素裹,韩小雷,季静.现浇楼板对RC框架结构破坏形式的影响分析[J].土木建筑与环境工程,2009,31(1):66-71(Wang Suguo,Han Xiaolei,Ji Jing.The effectof slabs on the failure mode of reinforced concrete framestructures[J].Journal of Civil Architectural andEnvironmental Engineering,2009,31(1):66-71(inChinese))
[9]阎红霞,杨庆山,李吉涛.现浇楼板对钢筋混凝土框架结构在地震作用下破坏形式的影响[J].振动与冲击,2011,30(7):227-232(Yan Hongxia,Yang Qingshan,LiJitao.Influence of cast-in-place floor slab on damage styleof frame structures under earthquake[J].Journal ofVibration and Shock,2011,30(7):227-232(in Chinese))
[10]蒋永生,陈忠范,周绪平,等.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16(JiangYongsheng,Chen Zhongfan,Zhou Xuping,et al.Aseismicresearch on RC frame joint of monolithically casted slab[J].Journal of Building Structures,1994,15(6):11-16(in Chinese))
[11]Lee J,Fenves G L.A plastic-damage concrete model forearthquake analysis of dams[J].Earthquake Engineeringand Structural Dynamics,1998,27(9):937-956
[12]Grassl P,Jirasek M.Damage-plastic model for concretefailure[J].International Journal of Solids and Structures,2006,43(22-23):7166-7196
[2]GB 50010—2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2011(GB 50010—2010 Code for designof concrete structures[S].Beijing:China Architecture andBuilding Press,2011(in Chinese))
[3]GB 50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2011(GB 50011—2010 Code for seismicdesign of building structures[S].Beijing:ChinaArchitecture and Building Press,2011(in Chinese))
[4]NZS3101 Concrete structures standard[S].New ZealandStandards Council,2006
[5]Building code requirements for structural concrete(ACI318-02)and commentary(ACI 318R-02)[S].AmericanConcrete Institute,2002
[6]吴勇,雷汲川,杨红,等.板筋参与梁端负弯矩承载力问题的探讨[J].重庆建筑大学学报,2002,24(3):33-37(Wu Yong,Lei Jichuan,Yang Hong,et al.Discussion onnegative flexural strength of beams including slabs[J].Journal of Chongqing Jianzhu University,2002,24(3):33-37(in Chinese))
[7]管民生,杜宏彪.现浇楼板参与工作后框架结构的pushover分析研究[J].地震工程与工程振动,2005,25(5):117-123(Guan Minsheng,Du Hongbiao.Pushoveranalysis of effect of casting slab on RC frame structure[J].Earthquake Engineering and Engineering Vibration,2005,25(5):117-123(in Chinese))
[8]王素裹,韩小雷,季静.现浇楼板对RC框架结构破坏形式的影响分析[J].土木建筑与环境工程,2009,31(1):66-71(Wang Suguo,Han Xiaolei,Ji Jing.The effectof slabs on the failure mode of reinforced concrete framestructures[J].Journal of Civil Architectural andEnvironmental Engineering,2009,31(1):66-71(inChinese))
[9]阎红霞,杨庆山,李吉涛.现浇楼板对钢筋混凝土框架结构在地震作用下破坏形式的影响[J].振动与冲击,2011,30(7):227-232(Yan Hongxia,Yang Qingshan,LiJitao.Influence of cast-in-place floor slab on damage styleof frame structures under earthquake[J].Journal ofVibration and Shock,2011,30(7):227-232(in Chinese))
[10]蒋永生,陈忠范,周绪平,等.整浇梁板的框架节点抗震研究[J].建筑结构学报,1994,15(6):11-16(JiangYongsheng,Chen Zhongfan,Zhou Xuping,et al.Aseismicresearch on RC frame joint of monolithically casted slab[J].Journal of Building Structures,1994,15(6):11-16(in Chinese))
[11]Lee J,Fenves G L.A plastic-damage concrete model forearthquake analysis of dams[J].Earthquake Engineeringand Structural Dynamics,1998,27(9):937-956
[12]Grassl P,Jirasek M.Damage-plastic model for concretefailure[J].International Journal of Solids and Structures,2006,43(22-23):7166-7196
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