砌体填充墙平面外受力分析及简化模型
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摘要
采用ANSYS分析软件,对顶端刚接和脱开的2种填充墙进行平面外受力变形性能的非线性数值模拟分析,考察了均布荷载和层间位移作用下,墙体开裂过程中的应力变化和破坏模式,验证了顶端刚接墙体在开裂后期存在明显的拱作用。结果表明:顶端刚接的填充墙在均布荷载作用下宜按三铰拱模型考虑,在层间位移作用下宜按两铰拱考虑;而顶端脱开、钢筋拉结的填充墙在均布荷载和层间位移作用下均可按顶端铰支、底端固接的模型考虑。
Two kinds of infill walls were numerically simulated and analyzed in nonlinear way by using ANSYS analysis software,one of which was rigidly connected to top beam;the other was connected to beam with reinforcement.Under uniformly distributed load and story displacement,the infill wall cracked.In the process of cracking,the stress changing and failure modes of walls were inspected.The arch effect of rigidly connected wall was obviously represented in late cracking period.Results show that the infill wall rigidly connected on top can be considered with three hinge arch model under uniformly distributed load,and can be considered with two hinge model under story displacement.The wall separated from top beam and connected by reinforcement can be simplified with the model of hinge joint on the top and consolidation on the bottom under uniformly distributed load and story displacement.
Two kinds of infill walls were numerically simulated and analyzed in nonlinear way by using ANSYS analysis software,one of which was rigidly connected to top beam;the other was connected to beam with reinforcement.Under uniformly distributed load and story displacement,the infill wall cracked.In the process of cracking,the stress changing and failure modes of walls were inspected.The arch effect of rigidly connected wall was obviously represented in late cracking period.Results show that the infill wall rigidly connected on top can be considered with three hinge arch model under uniformly distributed load,and can be considered with two hinge model under story displacement.The wall separated from top beam and connected by reinforcement can be simplified with the model of hinge joint on the top and consolidation on the bottom under uniformly distributed load and story displacement.
引文
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[3]ABRAMS D P,ANGEL R,UZARSKI J.Out-of-planeStrength of Unreinforced Masonry Infill Panels[J].Earthquake Spectra,1996,12(4):825-844.
[4]TU Y,CHUANG T,LIU P,et al.Out-of-plane Sha-king Table Tests on Unreinforced Masonry Panels inRC Frames[J].Engineering Structures,2010,32(12):3925-3935.
[5]DRYSDALE R G,ESSAWY A S.Out-of-plane Ben-ding of Concrete Block Walls[J].Journal of StructuralEngineering,1988,114(1):121-133.
[6]黄靓,施楚贤,熊辉.带砌体填充墙结构在地震作用下的安全性质疑[J].建筑结构,2005,35(3):57-60,65.HUANG Liang,SHI Chu-xian,XIONG Hui.Queryon Safety of Structure with the Infill Panels in Earth-quake[J].Building Structure,2005,35(3):57-60,65.
[7]李哲明,宁文奎,宋玉普,等.非承重抗震墙体实验研究[J].建筑结构,2004,34(8):31-34.LI Zhe-ming,NING Wen-kui,SONG Yu-pu,et al.Ex-perimental Study on a New Type of Infill Wall[J].Building Structure,2004,34(8):31-34.
[8]程云,刘明,王长玉,等.填充墙与柱脱开构造方式的平面外稳定研究[J].华中科技大学学报:城市科学版,2008,25(4):238-241.CHENG Yun,LIU Ming,WANG Chang-yu,et al.Out-of-plane Stability Test on Disconnection of Struc-ture Between Infill Wall and Frame[J].Journal ofHuazhong University of Science and Technology:Ur-ban Science Edition,2008,25(4):238-241.
[9]苑振芳,王振惠,李彤,等.论与框架柱脱开的砌块填充墙设计应用[J].建筑砌块与砌块建筑,2009(6):3-7.YUAN Zhen-fang,WANG Zhen-hui,LI Tong,et al.Design Application on Disconnection of Structure Be-tween Infill Wall and Frame[J].Building Block&Block Building,2009(6):3-7.
[10]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.WANG Xin-min.ANSYS Numerical Analysis ofBuilding and Civil Engineering Structure[M].Bei-jing:China Communications Press,2007.
[11]刘桂秋.砌体结构基本受力性能的研究[D].长沙:湖南大学,2005.LIU Gui-qiu.The Research on the Basic MechanicalBehavior of Masonry Structure[D].Changsha:Hu-nan University,2005.
[12]程云.砌块填充墙平面外抗震性能的试验与理论研究[D].大连:大连理工大学,2010.CHENG Yun.The Study of Shaking Table Test onOut-of-plane Performance of Infill Masonry Wall[D].Dalian:Dalian University of Technology,2010.
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