预制RC框架内嵌带竖缝剪力墙结构抗震性能研究
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摘要
为研究预制钢筋混凝土框架内嵌带竖缝剪力墙(PRCFW)结构的抗震性能,对2个单跨两层、缩尺比为1∶2的PRCFW试件进行了拟静力试验研究。考察了PRCFW结构的变形和延性、滞回耗能能力、承载力及刚度退化等性能,分析了框架与内填墙之间的抗剪连接件对结构整体性能的影响。试验结果表明:在加载过程中,设计的抗剪连接件性能可靠,未发生疲劳剪断或锚固破坏;内填墙设置竖缝对PRCFW结构的初期刚度影响较小;进入屈服段后,预制竖缝阻碍了斜裂缝的发展和贯通,缝间墙段以弯曲变形为主,承载力和刚度退化缓慢,使结构整体具有良好的延性和耗能能力。不同轴压比下的框架柱和现浇节点基本完好,破坏主要发生在内填墙和梁端。结合试验和分析结果,提出了PRCFW结构在工程设计时的若干补充计算及构造措施建议。
Quasi-static tests were performed on two one-bay,two-story specimens built at one-half scale to study the structural cyclic behavior of precast reinforced concrete frame with infill slit shear walls( PRCFW). Overall behaviors of the PRCFW structure such as deformation and ductility,energy dissipation capacity, strength and stiffness degradation were inspected. Influence of the shear connectors between the frame and infill walls on the overall structural behavior was also analyzed. Experimental results show that the designed shear connectors perform well during the loading process,and no shear fatigue failure or anchorage failure occurs. Prefabricated vertical slits in the infill walls have little effect on overall elastic stiffness of the specimen,but the vertical slits prevent the development and penetrating of diagonal cracks. The main deformation of the wall segments between vertical slits is bending deformation after the structure yields. The post-peak strength and stiffness decrease slowly,which offers the whole PRCFW structure a good ductility and energy dissipation capacity. Columns under different axial compression ratios and cast-inplace joints basically remain intact,while damage mainly occurs in the infills walls and beam ends,satisfying the principle of ‘strong joint-weak component,strong column-weak beam ' and the design prospective of dissipating earthquake energy by the damage of infills walls. Based on the test and analysis results,a few design recommendations including supplementary design rules and detailing requirements for this type of structure are proposed at last.
Quasi-static tests were performed on two one-bay,two-story specimens built at one-half scale to study the structural cyclic behavior of precast reinforced concrete frame with infill slit shear walls( PRCFW). Overall behaviors of the PRCFW structure such as deformation and ductility,energy dissipation capacity, strength and stiffness degradation were inspected. Influence of the shear connectors between the frame and infill walls on the overall structural behavior was also analyzed. Experimental results show that the designed shear connectors perform well during the loading process,and no shear fatigue failure or anchorage failure occurs. Prefabricated vertical slits in the infill walls have little effect on overall elastic stiffness of the specimen,but the vertical slits prevent the development and penetrating of diagonal cracks. The main deformation of the wall segments between vertical slits is bending deformation after the structure yields. The post-peak strength and stiffness decrease slowly,which offers the whole PRCFW structure a good ductility and energy dissipation capacity. Columns under different axial compression ratios and cast-inplace joints basically remain intact,while damage mainly occurs in the infills walls and beam ends,satisfying the principle of ‘strong joint-weak component,strong column-weak beam ' and the design prospective of dissipating earthquake energy by the damage of infills walls. Based on the test and analysis results,a few design recommendations including supplementary design rules and detailing requirements for this type of structure are proposed at last.
引文
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[9]孙国华,顾强,何若全,等.半刚接钢框架内填暗竖缝钢筋混凝土剪力墙结构滞回性能试验研究[J].建筑结构学报,2010,31(9):16-26.(SUN Guohua,GU Qiang,HE Ruoquan,et al.Experimental investigation of partially-restrained steel frame with concealed vertical slits RC infill walls[J].Journal of Building Structures,2010,31(9):16-26.(in Chinese))
[10]Tam V W Y,Tam C M,Zeng S X,et al.Towards adoption of prefabrication in construction[J].Building and Environment,2007,42(10):3642-3654.
[11]Saari W K,Hajjar J F,Schultz A E,Shield C K.Behavior of shear studs in steel frames with reinforced concrete infill walls[J].Journal of Constructional Steel Research,2004,60(10):1453-1480.
[12]Tong X D,Hajjar J F,Schultz A E,et al.Cyclic behavior of steel frame structures with composite reinforced concrete infill walls and partially-restrained connections[J].Journal of Constructional Steel Research,2005,61(1):531-552.
[13]American Institute of Steel Construction.Load and resistance factor design specification for structural steel buildings[S].Chicago,IL:AISC,1993.
[14]JGJ 101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ 101—1996Specification of testing methods for earthquake resistant buildings[S].Beijing:China Architecture&Building Press,1997.(in Chinese))
[15]朱聘儒.钢-混凝土组合梁设计原理[M].2版.北京:中国建筑工业出版社,2006:139-168.
[2]赵伟,童根树,杨强跃.钢框架内填预制带竖缝钢筋混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2012,33(7):140-146.(ZHAO Wei,TONG Genshu,YANG Qiangyue.Experimental study on seismic behavior of steel frame with prefabricated reinforced concrete infill slit shear walls[J].Journal of Building Structures,2012,33(7):140-146.(in Chinese))
[3]叶列平,康胜,曾勇.双功能带缝剪力墙的弹性受力性能分析[J].清华大学学报(自然科学版),1999,39(12):79-81.(YE Lieping,KANG Sheng,ZENG Yong.Analysis of elastic behaviors for dual function slitted shear wall[J].Journal of Tsinghua University(Science&Technology),1999,39(12):79-81.(in Chinese))
[4]叶列平,曾勇.双功能带缝剪力墙的弹塑性地震动力反应分析[J].工程力学,2002,19(3):74-77.(YE Lieping,ZENG Yong.Elasto-plastic dynamic analysis of dual functional shear wall with built-in slits[J].Engineering Mechanics,2002,19(3):74-77.(in Chinese))
[5]JGJ 99—1998高层民用建筑钢结构技术规程[S].北京:中国建筑工业出版社,1998.(JGJ 99—1998Technical specification for steel structure of tall buildings[S].Beijing:China Architecture&Building Press,1998.(in Chinese))
[6]张耀春,刘永华,丁玉坤,等.带竖缝钢筋混凝土剪力墙板的简化静力分析模型[J].土木工程学报,2006,39(9):62-67.(ZHANG Yaochun,LIU Yonghua,DING Yukun,et al.A simplified model for static analysis of slit RC shear walls[J].China Civil Engineering Journal,2006,39(9):62-67.(in Chinese))
[7]米旭峰.带竖缝钢筋混凝土剪力墙的壁式框架分析模型[J].工程力学,2010,27(1):188-194.(MI Xufeng.Wall-column frame model of RC slit wall[J].Engineering Mechanics,2010,27(1):188-194.(in Chinese))
[8]童根树,米旭峰.钢框架内嵌带竖缝钢筋混凝土剪力墙的补充计算和构造要求[J].建筑结构学报,2006,27(5):47-55.(TONG Genshu,MI Xufeng.Supplementary rules and detailing of steel framereinforced concrete infill slit wall system[J].Journal of Building Structures,2006,27(5):47-55.(in Chinese))
[9]孙国华,顾强,何若全,等.半刚接钢框架内填暗竖缝钢筋混凝土剪力墙结构滞回性能试验研究[J].建筑结构学报,2010,31(9):16-26.(SUN Guohua,GU Qiang,HE Ruoquan,et al.Experimental investigation of partially-restrained steel frame with concealed vertical slits RC infill walls[J].Journal of Building Structures,2010,31(9):16-26.(in Chinese))
[10]Tam V W Y,Tam C M,Zeng S X,et al.Towards adoption of prefabrication in construction[J].Building and Environment,2007,42(10):3642-3654.
[11]Saari W K,Hajjar J F,Schultz A E,Shield C K.Behavior of shear studs in steel frames with reinforced concrete infill walls[J].Journal of Constructional Steel Research,2004,60(10):1453-1480.
[12]Tong X D,Hajjar J F,Schultz A E,et al.Cyclic behavior of steel frame structures with composite reinforced concrete infill walls and partially-restrained connections[J].Journal of Constructional Steel Research,2005,61(1):531-552.
[13]American Institute of Steel Construction.Load and resistance factor design specification for structural steel buildings[S].Chicago,IL:AISC,1993.
[14]JGJ 101—1996建筑抗震试验方法规程[S].北京:中国建筑工业出版社,1997.(JGJ 101—1996Specification of testing methods for earthquake resistant buildings[S].Beijing:China Architecture&Building Press,1997.(in Chinese))
[15]朱聘儒.钢-混凝土组合梁设计原理[M].2版.北京:中国建筑工业出版社,2006:139-168.
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