填充墙作用框架结构动力分析
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摘要
目的为了解填充墙对框架结构振动周期、振动形态、动力反应等的影响特点,给结构设计提供参考和建议.方法建立了29个带填充墙的框架结构空间有限元对比分析模型,研究了结构的自振周期、振型特点,并且输入三种不同的地震波进行了时程分析.结果填充墙体对结构振动形态的影响不明显,但是当因减少填充墙体造成的"薄弱楼层"在建筑底部时,对结构的整体振动形态影响较大.随着填充材料刚度的减小,填充墙较少楼层处的刚度突变减弱,振型曲线更趋平滑;通过对比有限元方法和简化手算方法所得结构自振周期,认为考虑填充墙体影响时框架的自振周期折减系数取0.6较为合适;填充墙体的材料、位置、布置方式等对框架结构的动力时程反应均有一定影响.结论在进行框架结构填充墙体布置时应注意将其均匀分布于框架结构中,并尽量不在中部楼层设置过少的墙体;在结构计算时对填充墙框架自振周期应进行折减.
In order to know the influence of the infilled wall on the RC frame structure,and give some suggestions to the structure design,29 finite element analysis models of RC frame with infilled walls are established.The free-vibration periods and the vibration shape are studied.By putting 3 different earthquake waves into the RC frame calculate models,the time-history analysis are carried out.The analysis results indicate that the influence of the infilled walls on the structural vibration configuration is not obvious,but when the weak-floor caused by reduction of the infilled walls is at the bottom of construction,it has a greater impact on the overall vibration configuration of the structure.As the filler material stiffness decreases,the stiffness of floors with less infilled walls weakens suddenly and the vibration curve runs to be more smoothly.By comparing the self-vibration cycles of structure deriving from the finite element method with the simplified calculation method,we consider that the self-vibration period discount factor of 0.6 is more appropriate when taking the influence of infilled walls into the RC framework.The material,location,layouts etc.of the infilled walls have a certain impact on the frame structure of the dynamic time-history response.During carrying out the wall layout we should pay attention to its even distribution in the framework and try not to set less walls at the middle floors.
In order to know the influence of the infilled wall on the RC frame structure,and give some suggestions to the structure design,29 finite element analysis models of RC frame with infilled walls are established.The free-vibration periods and the vibration shape are studied.By putting 3 different earthquake waves into the RC frame calculate models,the time-history analysis are carried out.The analysis results indicate that the influence of the infilled walls on the structural vibration configuration is not obvious,but when the weak-floor caused by reduction of the infilled walls is at the bottom of construction,it has a greater impact on the overall vibration configuration of the structure.As the filler material stiffness decreases,the stiffness of floors with less infilled walls weakens suddenly and the vibration curve runs to be more smoothly.By comparing the self-vibration cycles of structure deriving from the finite element method with the simplified calculation method,we consider that the self-vibration period discount factor of 0.6 is more appropriate when taking the influence of infilled walls into the RC framework.The material,location,layouts etc.of the infilled walls have a certain impact on the frame structure of the dynamic time-history response.During carrying out the wall layout we should pay attention to its even distribution in the framework and try not to set less walls at the middle floors.
引文
[1]清华大学,西南交通大学,北京交通大学土木工程结构专家组.汶川地震建筑震害分析[J].建筑结构学报,2008,29(4):1-9.(Civil and structural groups of Tsinghua University,Xinan Jiaotong University and Beijing Jiaotong Uni-versity.Analysis on Building Seismic Damage in Wenchuan Earthquake[J].Journal of Building Struc-tures,2008,29(4):1-9.)
[2]施耀新.砖填充墙框架房屋的抗震设计研究[J].建筑技术通讯建筑结构分册,1980,6:10-15.(Shi Yaoxin.Study on seismic design of frame-wall structure filled with masonry[J].Architecture Tech-nology Communication,Partial Book of Building Structure,1980,6:10-15.)
[3]李常青,易伟建,刘应龙.忽略填充墙刚度对框架结构的抗震安全性能的影响[J].湖南城市学院学报,2003,24(6):14-16.(Li Changqing,Yi Weijian,Liu Yinglong.Neglec-ting the effect of safety assessment of the infilled walls rigidity to the quakeproof of infilled frames de-sign[J].Journal of Hunan City University,2003,24(6):14-16.)
[4]周优文,李宏,欧阳光.考虑填充墙影响的底层薄弱结构抗震性能研究[J].四川建筑科学研究,2006,32(2):121-123.(Zhou Youwen,Li Hong,Ouyang Guang.Study on aseismic behavior of frame structure with weakness story at bottom considering filled-wall influence[J].Sichuan Building Science,2006,32(2):121-123.)
[5]张艳敏,姚谦峰.水平地震作用下填充墙框架结构的刚度计算[J].山西建筑,2004,30(1):9-10.(Zhang Yanmin,Yao Qianfeng.Rigidity Calculation of Frame-wall Structure filled with masonry under horizontal earthquake[J].Shanxi Architecture,2004,30(1):9-10.)
[6]苏启旺,李力.汶川大地震中框架结构震害分析[J].四川建筑科学研究,2008,34(4):162-164.(Shu Qiwang,Li Li.Analysis on frame structureseismic damage in wenchuan earthquake[J].Sichuan Building Science,2008,34(4):162-164.)
[7]刘冬柏,王安玲.基于汶川地震房屋建筑破坏特征的几点启示[J].中外建筑,2008(9):21-26.(Liu Dongbai,Wang Anling.Several revelations based on the wenchuan earthquake damaged housing construction characteristics[J].Chinese and Over-seas Architecture,2008,(9):21-26.)
[8]李建中,吕西林,李翔,等.汶川地震中钢筋混凝土框架结构的震害[J].结构工程师,2008,24(3):9-11.(LI Jianzhong,LXilin,Li Xiang.Seismic Damage of Reinforced concrete frame Structure in Wenchuan Earthquake[J].Structural Engineer,2008,24(3):9-11.)
[9]Amar A,Chaker A C.Influence of masonry infill panels on the vibration and stiffness characteristics of R/C frame buildings[J].Earthquake Engineering and Structural Dynamics,1999,28(10):1061-1065.
[10]Buonopane S G,White R N.Pseudodynamic testing of masonry infilled reinforced concrete frame[J].Journal of Structural Engineering,1999,125(6):578-589.
[11]Dafnis A,Kolsch H,Reimerdes H G.Arching in Ma-sonry Walls Subjected to Earthquake Motions[J].Journal of Structural Engineering,2002,128(2):153-159.
[12]Lgeron F,Paultre P,Mazar J.Damage mechanics modeling of nonlinear seismic behavior of concrete structures[J].Journal of Structural Engineering,2005,131(6):946-954.
[13]中华人民共和国建设部,GBS0011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.(The Ministry of Construction of China,GB50011-2001,Code for seismic design of buildings[S].Bei-jing:China Architecture&Building Press,2001.)
[14]朱伯芳.有限单元法原理与应用[M].北京:中国水利水电出版社,1998.(Zhu Bofang.Principle and application of finite ele-ment[M].Beijing:China Water Conservation and E-lectricity Press,1998.)
[2]施耀新.砖填充墙框架房屋的抗震设计研究[J].建筑技术通讯建筑结构分册,1980,6:10-15.(Shi Yaoxin.Study on seismic design of frame-wall structure filled with masonry[J].Architecture Tech-nology Communication,Partial Book of Building Structure,1980,6:10-15.)
[3]李常青,易伟建,刘应龙.忽略填充墙刚度对框架结构的抗震安全性能的影响[J].湖南城市学院学报,2003,24(6):14-16.(Li Changqing,Yi Weijian,Liu Yinglong.Neglec-ting the effect of safety assessment of the infilled walls rigidity to the quakeproof of infilled frames de-sign[J].Journal of Hunan City University,2003,24(6):14-16.)
[4]周优文,李宏,欧阳光.考虑填充墙影响的底层薄弱结构抗震性能研究[J].四川建筑科学研究,2006,32(2):121-123.(Zhou Youwen,Li Hong,Ouyang Guang.Study on aseismic behavior of frame structure with weakness story at bottom considering filled-wall influence[J].Sichuan Building Science,2006,32(2):121-123.)
[5]张艳敏,姚谦峰.水平地震作用下填充墙框架结构的刚度计算[J].山西建筑,2004,30(1):9-10.(Zhang Yanmin,Yao Qianfeng.Rigidity Calculation of Frame-wall Structure filled with masonry under horizontal earthquake[J].Shanxi Architecture,2004,30(1):9-10.)
[6]苏启旺,李力.汶川大地震中框架结构震害分析[J].四川建筑科学研究,2008,34(4):162-164.(Shu Qiwang,Li Li.Analysis on frame structureseismic damage in wenchuan earthquake[J].Sichuan Building Science,2008,34(4):162-164.)
[7]刘冬柏,王安玲.基于汶川地震房屋建筑破坏特征的几点启示[J].中外建筑,2008(9):21-26.(Liu Dongbai,Wang Anling.Several revelations based on the wenchuan earthquake damaged housing construction characteristics[J].Chinese and Over-seas Architecture,2008,(9):21-26.)
[8]李建中,吕西林,李翔,等.汶川地震中钢筋混凝土框架结构的震害[J].结构工程师,2008,24(3):9-11.(LI Jianzhong,LXilin,Li Xiang.Seismic Damage of Reinforced concrete frame Structure in Wenchuan Earthquake[J].Structural Engineer,2008,24(3):9-11.)
[9]Amar A,Chaker A C.Influence of masonry infill panels on the vibration and stiffness characteristics of R/C frame buildings[J].Earthquake Engineering and Structural Dynamics,1999,28(10):1061-1065.
[10]Buonopane S G,White R N.Pseudodynamic testing of masonry infilled reinforced concrete frame[J].Journal of Structural Engineering,1999,125(6):578-589.
[11]Dafnis A,Kolsch H,Reimerdes H G.Arching in Ma-sonry Walls Subjected to Earthquake Motions[J].Journal of Structural Engineering,2002,128(2):153-159.
[12]Lgeron F,Paultre P,Mazar J.Damage mechanics modeling of nonlinear seismic behavior of concrete structures[J].Journal of Structural Engineering,2005,131(6):946-954.
[13]中华人民共和国建设部,GBS0011-2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.(The Ministry of Construction of China,GB50011-2001,Code for seismic design of buildings[S].Bei-jing:China Architecture&Building Press,2001.)
[14]朱伯芳.有限单元法原理与应用[M].北京:中国水利水电出版社,1998.(Zhu Bofang.Principle and application of finite ele-ment[M].Beijing:China Water Conservation and E-lectricity Press,1998.)
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