填充墙不规则布置对RC框架抗震性能影响试验研究
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摘要
进行3榀单层两跨填充墙RC框架结构试件在水平往复荷载作用下的抗震性能试验,重点研究砌体填充墙及其布置形式对框架结构抗震性能的影响。填砌方式包括两跨均半高填砌和仅一跨全高填砌两种。通过试验结果对各试件的破坏特征、滞回曲线、骨架曲线、位移延性、刚度退化、强度退化和耗能性能等抗震性能指标进行分析。试验结果表明:①填充墙对框架具有明显的刚度效应,其存在较大地提高了框架结构的抗侧刚度和水平承载力;②填充墙对框架柱具有明显约束效应,其存在和布置方式对框架结构的破坏形态具有明显影响,带填充墙的框架柱最终均发生剪切破坏;③两跨均半高填砌的框架结构由于填充墙的约束效应,柱均发生"短柱"破坏,其延性和耗能能力均比对比框架差;④仅一跨全高填砌填充墙的框架,其填充墙的破损过程参与了框架结构的滞回耗能,虽然最终在填砌跨柱发生剪切破坏,仍具有较好的抗震性能。研究结果可为考虑填充墙和框架共同作用的弹塑性地震反应分析提供参考。
Three one-storey-two-bay reinforced concrete (RC) frames were constructed and tested under cyclic loading to investigate the effects of infilled walls with various infill configurations on the seismic behavior of RC frame structures. One specimen frame is for comparison and has no infilled walls, and the other two frames have infilled walls, with either two bays infilled with half-height wall or only one bay infilled with all-height wall. Based on the test results, the damage characteristics, hysteretic curves, skeleton curves, displacement ductility, stiffness degradation, strength degradation and energy dissipation were analyzed. The results indicate that:①Infill walls may enhance the lateral stiffness and strength of the frames;②The configuration of infill walls affects the failure modes of infilled RC frames, and all the columns connecting with infill walls exhibit shear failure;③Infill walls have strong restraint effect on the frames, and as a result, the frame with two-bay half-height infilled walls underwent short column failure;④As for the RC frame with all-height infilled wall in one bay, the infilled wall participated in the structural hysteretic energy dissipation. Although shear failure occurred in those columns connecting with infill walls, the frame still exhibited higher ultimate strength and energy dissipating capacity than that of the frame without infill wall.
Three one-storey-two-bay reinforced concrete (RC) frames were constructed and tested under cyclic loading to investigate the effects of infilled walls with various infill configurations on the seismic behavior of RC frame structures. One specimen frame is for comparison and has no infilled walls, and the other two frames have infilled walls, with either two bays infilled with half-height wall or only one bay infilled with all-height wall. Based on the test results, the damage characteristics, hysteretic curves, skeleton curves, displacement ductility, stiffness degradation, strength degradation and energy dissipation were analyzed. The results indicate that:①Infill walls may enhance the lateral stiffness and strength of the frames;②The configuration of infill walls affects the failure modes of infilled RC frames, and all the columns connecting with infill walls exhibit shear failure;③Infill walls have strong restraint effect on the frames, and as a result, the frame with two-bay half-height infilled walls underwent short column failure;④As for the RC frame with all-height infilled wall in one bay, the infilled wall participated in the structural hysteretic energy dissipation. Although shear failure occurred in those columns connecting with infill walls, the frame still exhibited higher ultimate strength and energy dissipating capacity than that of the frame without infill wall.
引文
[1]郭子雄,吴毅彬,黄群贤.砌体填充墙框架结构抗震性能研究现状与展望[J].地震工程与工程震动,2008,28(6):172-177(Guo Zixiong,Wu Yibin,Huang Qunxian.Research and development in seismic behavior of infilled-frame structures[J].Journal of Earthquake Engineering and Engineering Vibration,2008,28(6):172-177(in Chinese))
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[3]李宏男,肖诗云,霍林生.汶川地震震害调查与启示[J].建筑结构学报,2008,29(4):10-19(Li Hongnan,Xiao Shiyun,Huo Linsheng.Damage investigation and analysis of engineering structures in the Wenchuan earthquake[J].Journal of Building Structures,2008,29(4):10-19(in Chinese))
[4]吴绮芸,田家骅,徐显毅.砖墙填充框架在单向及反复水平荷载作用下的性能研究[J].建筑结构学报,1980,1(4):38-44(Wu Qiyun,Tian Jiabi,Xu Xianyi.A study of the behavior of brick infilled frame structures under monotonic and reversed cyclic horizontal loads[J].Journal of Building Structures,1980,1(4):38-44(in Chinese))
[5]童岳生,钱国芳.填充墙框架的工作性能及设计计算[J].西安冶金建筑学院学报,1983(3):14-29(Tong Yuesheng,Qian Guofang.On the behavior and the design of infilled frames[J].Journal of Xi an Institute of Metallurgy and Construction Engineering,1983(3):14-29(in Chinese))
[6]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,1996,17(4):27-34(Zhu Ronghua,Shen Jumin.Pseudo-dynamic earthquake response test and theoretical analysis of RC frame with brick masonry infilling[J].Journal of Building Structures,1996,17(4):27-34(in Chinese))
[7]刘玉姝,李国强.带填充墙钢框架结构抗侧力性能试验及理论研究[J].建筑结构学报,2005,26(3):78-85(Liu Yushu,Li Guoqiang.Experimental and theoretical research on lateral load resistance of steel frames with infilled walls[J].Journal of Building Structures,2005,26(3):78-85(in Chinese))
[8]Chaker AA,Cherifati A.Influence of masonry infill panels on the vibration and stiffness characteristics of R/C frame buildings[J].Earthquake Engineering&Structural Dynamics,1999,28(9):1061-1065
[9]Henderson R C,Fricke K E,Jones W D,et al.Summary of a large-and small-scale unreinforced masonry infill test program[J].Journal of Structural Engineering,2003,129(12):1667-1675
[10]Perera R.Performance evaluation of masonry-inflled RC frames under cyclic loading based on damage mechanics[J].Engineering Structures,2005,27(8):1278-1288
[11]Mondal G,Jain S K.Lateral stiffness of masonry infilled reinforced concrete(RC)frames with central opening[J].Earthquake Spectra,2008,24(3):701-723
[12]Anil O,Altin S.An experimental study on reinforced concrete partially infilled frames[J].Engineering Structures,2007,29(3):449-460
[13]Kose M M.Parameters affecting the fundamental period of RC buildings with infill walls[J].Engineering Structures,2009,31(1):93-102
[2]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,Xi’nan Jiaotong University and Beijing Jiaotong University.Analysis on seismic damage of buildings in the Wenchuan earthquake[J].Journal of Building Structures,2008,29(4):1-9(in Chinese))
[3]李宏男,肖诗云,霍林生.汶川地震震害调查与启示[J].建筑结构学报,2008,29(4):10-19(Li Hongnan,Xiao Shiyun,Huo Linsheng.Damage investigation and analysis of engineering structures in the Wenchuan earthquake[J].Journal of Building Structures,2008,29(4):10-19(in Chinese))
[4]吴绮芸,田家骅,徐显毅.砖墙填充框架在单向及反复水平荷载作用下的性能研究[J].建筑结构学报,1980,1(4):38-44(Wu Qiyun,Tian Jiabi,Xu Xianyi.A study of the behavior of brick infilled frame structures under monotonic and reversed cyclic horizontal loads[J].Journal of Building Structures,1980,1(4):38-44(in Chinese))
[5]童岳生,钱国芳.填充墙框架的工作性能及设计计算[J].西安冶金建筑学院学报,1983(3):14-29(Tong Yuesheng,Qian Guofang.On the behavior and the design of infilled frames[J].Journal of Xi an Institute of Metallurgy and Construction Engineering,1983(3):14-29(in Chinese))
[6]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,1996,17(4):27-34(Zhu Ronghua,Shen Jumin.Pseudo-dynamic earthquake response test and theoretical analysis of RC frame with brick masonry infilling[J].Journal of Building Structures,1996,17(4):27-34(in Chinese))
[7]刘玉姝,李国强.带填充墙钢框架结构抗侧力性能试验及理论研究[J].建筑结构学报,2005,26(3):78-85(Liu Yushu,Li Guoqiang.Experimental and theoretical research on lateral load resistance of steel frames with infilled walls[J].Journal of Building Structures,2005,26(3):78-85(in Chinese))
[8]Chaker AA,Cherifati A.Influence of masonry infill panels on the vibration and stiffness characteristics of R/C frame buildings[J].Earthquake Engineering&Structural Dynamics,1999,28(9):1061-1065
[9]Henderson R C,Fricke K E,Jones W D,et al.Summary of a large-and small-scale unreinforced masonry infill test program[J].Journal of Structural Engineering,2003,129(12):1667-1675
[10]Perera R.Performance evaluation of masonry-inflled RC frames under cyclic loading based on damage mechanics[J].Engineering Structures,2005,27(8):1278-1288
[11]Mondal G,Jain S K.Lateral stiffness of masonry infilled reinforced concrete(RC)frames with central opening[J].Earthquake Spectra,2008,24(3):701-723
[12]Anil O,Altin S.An experimental study on reinforced concrete partially infilled frames[J].Engineering Structures,2007,29(3):449-460
[13]Kose M M.Parameters affecting the fundamental period of RC buildings with infill walls[J].Engineering Structures,2009,31(1):93-102
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