填充墙对混凝土框架结构抗震性能影响的静力弹塑性分析
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摘要
采用三支杆模型建立了填充墙框架结构的力学模型,分别对两类填充墙框架结构和纯框架结构进行了两种常规侧向力加载模式下的静力弹塑性分析,研究了结构的基底剪力-顶点位移关系曲线、性能点处结构的层位移和层间位移角以及塑性铰的发展情况。计算结果表明,填充墙的加入使结构抗侧移能力和承担的剪力显著增大,填充墙的不合理布设使结构出现薄弱层,易导致结构整体倒塌。在结构抗震设计中,应考虑填充墙与框架结构协同工作。
The mechanical model of infilled frame structure is established by adopting the three-strut model.Pushover analysis with two common lateral load patterns on two types of the infilled frame structures and the bare frame structure is carried out in this paper.The analysis results,including the base shear to top displacement curves,storey displacement and interstorey drift of the performance points,and the development of the plastic hinges,are compared and analyzed.The analysis results show that the abilities of the resistance to lateral displacement and the bearing to shear force of the structures are significantly increased for the influence of the infilled walls.It also shows that the weaker storey is formed due to the unreasonable layout of infilled walls,and thus leads to the collapse of the whole structures.The cooperative work between infilled walls and frames should be considered in the seismic design of buildings.
The mechanical model of infilled frame structure is established by adopting the three-strut model.Pushover analysis with two common lateral load patterns on two types of the infilled frame structures and the bare frame structure is carried out in this paper.The analysis results,including the base shear to top displacement curves,storey displacement and interstorey drift of the performance points,and the development of the plastic hinges,are compared and analyzed.The analysis results show that the abilities of the resistance to lateral displacement and the bearing to shear force of the structures are significantly increased for the influence of the infilled walls.It also shows that the weaker storey is formed due to the unreasonable layout of infilled walls,and thus leads to the collapse of the whole structures.The cooperative work between infilled walls and frames should be considered in the seismic design of buildings.
引文
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[12]齐彬,郭子雄.考虑填充墙影响的教学楼框架结构推覆分析[J].工程抗震与加固改造,2010,32(2)Qi Bin,Guo Zi-xiong.Pushover Analysis of RC Frame School Buildings Considering the Influence of Infilled Wall[J].Earthquake Resistant Engineering and Retrofitting,2010,32(2)(in Chinese)
[2]侯爽,杨伟.汶川地震都江堰市填充墙震害分析[J].大连理工大学学报,2009,49(5):754～757Hou Shuang,Yang Wei.Infill Damage Assessment of Dujiangyan City Subjected to Wenchuan Earthquake[J].Journal of Dalian University of Technology,2009,49(5):754～757(in Chinese)
[3]张敏政.从汶川地震看抗震设防和抗震设计[J].土木工程学报,2009,42(5):21～24Zhang Min-zheng.Reflection on the SeismicFortification and Design in Light of the Wenchuan Earthquake[J].China Civil Engineering Journal,2009,42(5):21～24(in Chinese)
[4]GB50011-2010,建筑抗震设计规范[S]GB50011-2010,Code for Seismic Design of Buildings[S](in Chinese)
[5]Al-Chaar G,Issa M,Sweeney S.Behavior of Masonryinfilled Nonductile Reinforced Concrete Frames[J].Journal of Structural Engineering,ASCE,2002,128(8):1055～1063
[6]El-Dakhakhni W W,Elgaaly M,Hamid A A.ThreeStrut Model for Concrete Masonry-infilled Steel Frames[J].Journal of Structural Engineering,ASCE,2003,129(2):177～185
[7]Koutromanos L,Stavridis A,Shing P B.Numerical Modeling of Masonry-infilled RC Frames Subjected to Seismic Loads[J].Computers&Structures,2011,11～12(s1):1026～1037
[8]朱荣华,沈聚敏.砖填充墙钢筋混凝土框架拟动力地震反应试验及理论分析[J].建筑结构学报[J].1996,17(4):27～34Zhu Rong-hua,Shen Ju-min.Pseudo-Dynamic Earthquake Response Test and Theoretical Analysis of RC Frame with Brick Masonry Infilling[J].Journal of Building Structues,1996,17(4):27～34(in Chinese)
[9]Moghaddam H A.Lateral Load Behavior of Masonry Infilled Steel Frames with Repair and Retrofit[J].Journal of Structural Engineering,ASCE,2004,130(1):56～63
[10]谷倩,彭波,刘肖凡.钢框架-砌体填充墙结构三支杆模型有限元分析[J].武汉大学学报(工学版),2006,39(5):30～34Gu Qian,Peng Bo,Liu Xiao-fan.Finite Element Analysis of Three-strut Model for Masonry-infilled Steel Frames[J].Engineering Journal of Wuhan University,2006,39(5):30～34(in Chinese)
[11]莫庸,金建民,等.小高层建筑填充墙震害和抗震设计的初步探讨[J].工程抗震与加固改造,2008,30(4):56～59Mo Yong,Jin Jian-min,et al.A Prode in Seismic Damage and Seismic Design of Filler Walls of Small High-rise Buildings[J].Earthquake Resistant Engineering and Retrofitting,2008,30(4):56～59(in Chinese)
[12]齐彬,郭子雄.考虑填充墙影响的教学楼框架结构推覆分析[J].工程抗震与加固改造,2010,32(2)Qi Bin,Guo Zi-xiong.Pushover Analysis of RC Frame School Buildings Considering the Influence of Infilled Wall[J].Earthquake Resistant Engineering and Retrofitting,2010,32(2)(in Chinese)
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