计算模型对框架结构梁柱内力影响研究
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摘要
结构抗震设计的基本原则之一是保证"强柱弱梁",但汶川地震等大量实际震害表明这一抗震设计目标并未能很好地实现。针对此问题,已开展大量研究,探讨了楼板、填充墙以及梁、柱、板配筋等因素对形成"强梁弱柱"的影响。本文则从计算模型方面,即结构分析中广泛采用的模型、精细有限元模型和楼板与梁分别考虑的模型,对梁柱内力影响进行了对比研究。结果表明,计算模型对梁、柱弯矩比有较大影响,是形成"强梁弱柱"的重要影响因素。
"Strong column and weak beam" is one of the fundamental design principles for earthquake-resistant structures.However,this requirement is not well satisfied as shown in a lot of investigations of earthquake damage,including the Wenchuan earthquake.Extensive researches are done to explain that the floors,filling walls and reinforcement of structures affect the embodying of the principle 'strong beam and weak column'.In this paper,the internal forces of beams and columns are compared for different analytic model,including SFEM,FFFM and the peculiar model dealing floors and beams separately.Our results show that the moment ratio between beams and columns is most sensitive to different analytic models,which play a key role in embodying the principle 'strong beam and weak column'.
"Strong column and weak beam" is one of the fundamental design principles for earthquake-resistant structures.However,this requirement is not well satisfied as shown in a lot of investigations of earthquake damage,including the Wenchuan earthquake.Extensive researches are done to explain that the floors,filling walls and reinforcement of structures affect the embodying of the principle 'strong beam and weak column'.In this paper,the internal forces of beams and columns are compared for different analytic model,including SFEM,FFFM and the peculiar model dealing floors and beams separately.Our results show that the moment ratio between beams and columns is most sensitive to different analytic models,which play a key role in embodying the principle 'strong beam and weak column'.
引文
[1]GB50011-2001建筑抗震设计规范[S].GB50011-2001 Code for Seismic Design of Buildings[S].(in Chinese)
[2]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for Seismic Design of Buildings[S].(in Chinese)
[3]王亚勇,白雪霜.台湾921地震中钢筋混凝土结构震害特征[J].工程抗震,2001,1:3-7.WANG Yayong,BAI Xueshuang.Damage features of R.C.structures in the September 21,1999 Taiwan Earthquake[J].Earthquake ResistantEngineering,2001,1:3-7.(in Chinese)
[4]孙景江,唐玉红,孙忠贤,等.汶川地震VIII度和VII度区城市房屋震害及若干典型震害讨论[J].地震工程与工程振动,2009,29(6):11-13.SUN Jingjiang,TANG Yuhong,SUN Zhongxian,et al.Damage to urban buildings in zones with intensityⅧorⅦduring Wenchuan earthquake anddiscussions on some Typical damage[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(6):11-13.(in Chinese)
[5]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.WANG Yayong.Lessons learnt from building damages in the Wenchuan earthquake——seismic concept design of buildings[J].Journal of Build-ing Structures,2008,29(4):20-25.(in Chinese)
[6]Sun Jingjiang,Wang Tao,Qi Hu.Structural health monitoring of long-span suspension bridges using wavelet packet analysis[J].Earthquake Engi-neering and Engineering Vibration,2007,6(3):281-288.
[7]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-weak beam mechanism for RC frames based on the damage analysisin the Wenchuan earthquake[J].Journal of Building Structures,2008,38(11):52-59.(in Chinese)
[8]马千里,叶列平,陆新征,等.现浇楼板对框架结构柱梁强度比的影响研究[R].汶川地震建筑震害调查与灾后重建分析报告,中国建筑工业出版社,2008:263-271.
[9]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.JIANG Yongsheng,CHEN Zhongfan,ZHOU Xuping,et al.Aseismic rearch on RC frame joint of monolithically casted slab[J].Journal of Build-ing Structures,1994,15(6):11-16.(in Chinese)
[10]Durrani A J,Zerbe H E.Seismic resistance of RC exterior connections with floor slab[J].Journal of Structural Engineering,1987,113(8):1850-1864.
[11]French C W,Boroojerdi A.Contribution of RC floor slabs in resisting lateral loads[J].Journal of Structural Engineering,1989,115(1):1-18.
[12]丁圣果,郑涛,肖常健,等.现浇框架结构梁、板、柱协同工作体系的有限元方法及其内力特征[J].贵州工业大学学报,2003,32(6):82-87.DING Shengguo,ZHENG Tao,XIAO Changjian,et al.Finite element method and internal forces of cast-in-place girder-slab-column sys-tem[J].Journal of Guizhou University of Technology,2003,32(6):82-87.(in Chinese)
[2]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for Seismic Design of Buildings[S].(in Chinese)
[3]王亚勇,白雪霜.台湾921地震中钢筋混凝土结构震害特征[J].工程抗震,2001,1:3-7.WANG Yayong,BAI Xueshuang.Damage features of R.C.structures in the September 21,1999 Taiwan Earthquake[J].Earthquake ResistantEngineering,2001,1:3-7.(in Chinese)
[4]孙景江,唐玉红,孙忠贤,等.汶川地震VIII度和VII度区城市房屋震害及若干典型震害讨论[J].地震工程与工程振动,2009,29(6):11-13.SUN Jingjiang,TANG Yuhong,SUN Zhongxian,et al.Damage to urban buildings in zones with intensityⅧorⅦduring Wenchuan earthquake anddiscussions on some Typical damage[J].Journal of Earthquake Engineering and Engineering Vibration,2009,29(6):11-13.(in Chinese)
[5]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.WANG Yayong.Lessons learnt from building damages in the Wenchuan earthquake——seismic concept design of buildings[J].Journal of Build-ing Structures,2008,29(4):20-25.(in Chinese)
[6]Sun Jingjiang,Wang Tao,Qi Hu.Structural health monitoring of long-span suspension bridges using wavelet packet analysis[J].Earthquake Engi-neering and Engineering Vibration,2007,6(3):281-288.
[7]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-weak beam mechanism for RC frames based on the damage analysisin the Wenchuan earthquake[J].Journal of Building Structures,2008,38(11):52-59.(in Chinese)
[8]马千里,叶列平,陆新征,等.现浇楼板对框架结构柱梁强度比的影响研究[R].汶川地震建筑震害调查与灾后重建分析报告,中国建筑工业出版社,2008:263-271.
[9]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.JIANG Yongsheng,CHEN Zhongfan,ZHOU Xuping,et al.Aseismic rearch on RC frame joint of monolithically casted slab[J].Journal of Build-ing Structures,1994,15(6):11-16.(in Chinese)
[10]Durrani A J,Zerbe H E.Seismic resistance of RC exterior connections with floor slab[J].Journal of Structural Engineering,1987,113(8):1850-1864.
[11]French C W,Boroojerdi A.Contribution of RC floor slabs in resisting lateral loads[J].Journal of Structural Engineering,1989,115(1):1-18.
[12]丁圣果,郑涛,肖常健,等.现浇框架结构梁、板、柱协同工作体系的有限元方法及其内力特征[J].贵州工业大学学报,2003,32(6):82-87.DING Shengguo,ZHENG Tao,XIAO Changjian,et al.Finite element method and internal forces of cast-in-place girder-slab-column sys-tem[J].Journal of Guizhou University of Technology,2003,32(6):82-87.(in Chinese)
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