钢筋机械连接的装配式框架抗震性能试验研究与有限元分析
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摘要
为研究钢筋套筒挤压搭接连接的装配式叠合梁-预制柱框架结构的抗震性能,通过2个1/2缩尺的两层两跨装配式框架试件的拟静力试验,对其破坏形态、变形能力、承载能力等进行研究。试验结果表明:设计为"强柱弱梁"及设计为"强梁弱柱"的试件均实现预期的破坏形态;试件的水平力-位移滞回曲线较为饱满;2个试件的极限层间位移角最小分别为1/29和1/31,层间位移延性系数都大于4.0,表明试件具有很好的延性性能;套筒挤压搭接连接能有效传递钢筋拉、压力。采用有限元分析程序MSC.MARC,对装配式框架试件进行非线性数值模拟,模拟结果与试验结果吻合较好,试件KJ1按现浇框架推覆分析与按装配式框架推覆分析所得水平力-位移曲线基本一致。钢筋套筒挤压连接的装配式混凝土框架,其抗震性能满足现行规范的要求,且可按现浇框架进行内力、变形和承载力计算。
To study the seismic performance of assembled composite beam-precast column concrete frame structures with rebars lapping in pressed sleeve, quasi-static tests on two 1/2-scale assembled frame specimens with two story and two span were carried out for the failure modes, deformation capacity, load capacity and so on. The test results indicate that both the specimen designed as "strong column-weak beam" and the specimen designed as "strong beam-weak column" can achieve the expected failure modes. The lateral load-displacement hysteresis curves of the specimens are rounded; the minimum inter-story drift ratios of two specimens are 1/29 and 1/31, respectively, all the inter-story displacement ductility factors are greater than 4.0, indicating that the specimens have good ductility; the pressed sleeves can transfer the tensile and compressive force of rebars effectively; the non-linear analysis results of specimens using the finite element software MSC.MARC agree well with the experimental results, and the pushover analysis results show that the horizontal force-displacement curve of assembled specimen KJ1 is basically consistent with that of cast-in-place frame. The seismic behavior of assembled frames with rebars spliced by mechanical connection can meet the requirements in current codes, and the internal force, deformation and bearing capacity can be calculated according to the cast-in-place frame.
To study the seismic performance of assembled composite beam-precast column concrete frame structures with rebars lapping in pressed sleeve, quasi-static tests on two 1/2-scale assembled frame specimens with two story and two span were carried out for the failure modes, deformation capacity, load capacity and so on. The test results indicate that both the specimen designed as "strong column-weak beam" and the specimen designed as "strong beam-weak column" can achieve the expected failure modes. The lateral load-displacement hysteresis curves of the specimens are rounded; the minimum inter-story drift ratios of two specimens are 1/29 and 1/31, respectively, all the inter-story displacement ductility factors are greater than 4.0, indicating that the specimens have good ductility; the pressed sleeves can transfer the tensile and compressive force of rebars effectively; the non-linear analysis results of specimens using the finite element software MSC.MARC agree well with the experimental results, and the pushover analysis results show that the horizontal force-displacement curve of assembled specimen KJ1 is basically consistent with that of cast-in-place frame. The seismic behavior of assembled frames with rebars spliced by mechanical connection can meet the requirements in current codes, and the internal force, deformation and bearing capacity can be calculated according to the cast-in-place frame.
引文
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[8]李宁波,钱稼茹,叶列平,等.竖向钢筋套筒挤压连接的预制钢筋混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2016,37(1):31-40(Li Ningbo,Qian Jiaru,Ye Lieping,et al.Tests on seismic behavior of precast RC shear walls with vertical rebar splicing by pressed sleeve[J].Journal of Building Structures,2016,37(1):31-40(in Chinese))
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[17]刘金海,李国禄,郝晓燕,等.球墨铸铁微观组织与拉伸行为的相关性[J].铸造技术,2009,30(3):329-332(Liu Jinhai,Li Guolu,Hao Xiaoyan,et al.Correlation between matrix and tensile behavior of ductile cast iron[J].Foundry Technology,2009,30(3):329-332(in Chinese))
[2]Blandon J J,Rodriguez M E.Behavior of connections and floor diaphragms in seismic-resisting precast concrete buildings[J].PCI Journal,2005,50(2):56-75
[3]薛伟辰,杨新磊,王蕴,等.现浇柱叠合梁框架节点抗震性能试验研究[J].建筑结构学报,2008,29(6):9-17(Xue Weichen,Yang Xinlei,Wang Yun,et al.Experimental study on seismic behavior of different type of frame connections with composite beams and cast-in-place columns[J].Journal of Building Structures,2008,29(6):9-17(in Chinese))
[4]杨新磊,薛伟辰,窦祖融,等.两层两跨现浇柱叠合梁框架抗震性能试验研究[J].建筑结构学报,2008,29(6):18-24(Yang Xinlei,Xue Weichen,Dou Zurong,et al.Experimental study on seismic behavior of two-story two-bay frame with composite beams and cast-in-place columns[J].Journal of Building Structures,2008,29(6):18-24(in Chinese)
[5]薛伟辰,杨新磊,王蕴,等.六层两跨现浇柱预制梁框架抗震性能试验研究[J].建筑结构学报,2008,29(6):25-32(Xue Weichen,Yang Xinlei,Wang Yun,et al.Experimental study on seismic behavior of six-story two-bay frame with precast beams and cast-in-place columns[J].Journal of Building Structures,2008,29(6):25-32(in Chinese))
[6]罗青儿,王蕴,翁煜辉,等.装配整体式混凝土框架的试验研究[J].特种结构,2008,25(4):55-58
[7]JGJ 107-2016钢筋机械连接技术规程[S].北京:中国建筑工业出版社,2016(JGJ 107-2016 Technical specification for mechanical splicing of steel reinforcing bars[S].Beijing:China Architecture&Building Press,2016(in Chinese))
[8]李宁波,钱稼茹,叶列平,等.竖向钢筋套筒挤压连接的预制钢筋混凝土剪力墙抗震性能试验研究[J].建筑结构学报,2016,37(1):31-40(Li Ningbo,Qian Jiaru,Ye Lieping,et al.Tests on seismic behavior of precast RC shear walls with vertical rebar splicing by pressed sleeve[J].Journal of Building Structures,2016,37(1):31-40(in Chinese))
[9]李宁波,钱稼茹,刘时伟,等.部分竖向分布钢筋套筒挤压连接的预制剪力墙抗震性能试验研究[J].土木工程学报,2016,49(7):36-48(Li Ningbo,QianJiaru,Liu Shiwei,et al.Experimental study on seismic behavior of pre-cast shear walls with partial vertical distributed steel bars pressed sleeve splicing[J].China Civil Engineering Journal,2016,49(7):36-48(in Chinese))
[10]张微敬,郭媛媛,刘时伟.钢筋套筒挤压连接的预制RC柱抗震性能试验研究[J].工程力学,2016,33(12):119-127(Zhang Weijing,GuoYuanyuan,Liu Shiwei.Experimental research on seismic behavior of precast RC columns with steel bars spliced by compressive sleeves[J].Engineering Mechanics,2016,33(12):119-127(in Chinese))
[11]赵作周,韩文龙,钱稼茹,等.钢筋套筒挤压连接装配整体式梁柱中节点抗震性能试验研究[J].建筑结构学报,2017,38(4):45-53(Zhao Zuozhou,Han Wenlong,Qian Jiaru,et al.Experimental study on seismic behavior of assembled monolithic beam-column interior joints with rebar spliced by pressed sleeve[J].Journal of Building Structures,2017,38(4):45-53(in Chinese))
[12]GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010(GB 50010-2010 Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[13]JGJ/T 101-2015建筑抗震试验规程[S].北京:中国建筑工业出版社,2015(JGJ/T 101-2015 Specification for seismic test of buildings[S].Beijing:China Architecture&Building Press,2015(in Chinese))
[14]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010(GB 50011-2010 Code for seismic design of buildings[S].Beijing:China Architecture&Building Press,2010(in Chinese))
[15]Légeron F,Paultre P.Uniaxial confinement model for normal-and high-strength concrete columns[J].Journal of Structural Engineering,2003,129(2):241-252
[16]Esmaeily A,Xiao Y.Behavior of reinforced concrete columns under variable axial loads:analysis[J].ACIStructural Journal,2005,102(5):736-744
[17]刘金海,李国禄,郝晓燕,等.球墨铸铁微观组织与拉伸行为的相关性[J].铸造技术,2009,30(3):329-332(Liu Jinhai,Li Guolu,Hao Xiaoyan,et al.Correlation between matrix and tensile behavior of ductile cast iron[J].Foundry Technology,2009,30(3):329-332(in Chinese))