型钢混凝土空腹叠合梁受剪承载力试验研究
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摘要
为更加深入研究型钢混凝土叠合梁的受剪机理,提出更为优化的截面形式,该文完成了10个足尺型钢混凝土叠合梁在单调集中荷载作用下的静力试验研究。通过考察剪跨比、截面形式(空腹和实腹)等参数对受剪性能的影响,着重研究了足尺型钢混凝土空腹叠合梁的受剪性能。结合试验结果对各试件的裂缝形态、破坏特征、承载能力、变形等性能进行了分析研究。采用桁架-拱模型并基于变形协调条件将桁架、拱和型钢三者对受剪承载力的作用相结合,建立了适用于型钢混凝土叠合梁的受剪承载力计算方法。结果表明:型钢混凝土空腹叠合梁与实腹叠合梁具有相似的受剪性能和破坏形态,承载力随剪跨比的增大而减小,试件整体性良好;采用JGJ 2016和YB 9082-2006计算的受剪承载力离散型偏大,该文建立的修正桁架-拱模型计算值与试验结果吻合较好。
In order to investigate the shear mechanism of steel reinforced concrete composite beams and further optimize their section shapes, a static experiment with ten full-scaled specimens was carried out. The developments of strain, crack propagation, failure mode, deformation and shear capacity were thoroughly explored and the effects of aspect ratio and section shape(solid and hollow) were critically examined. On the basis of the test results, a proposed truss-arch model, which takes the compatibility of a truss, an arch and steel shape into account, was applied to establish the calculation method for the shear capacity of steel reinforced concrete hollow composite beams. The results indicated that: the specimens with solid section and hollow section both suffered similar failure modes and exhibited similar shear bearing capacities, and the shear bearing capacity decreased with the increase of the aspect ratio. The shear capacity calculated by the JGJ 138-2016 and YB9082-2006 shows high discreteness. The shear strengths obtained by the proposed method(compatible truss-arch model) agreed well with those from the experiment.
In order to investigate the shear mechanism of steel reinforced concrete composite beams and further optimize their section shapes, a static experiment with ten full-scaled specimens was carried out. The developments of strain, crack propagation, failure mode, deformation and shear capacity were thoroughly explored and the effects of aspect ratio and section shape(solid and hollow) were critically examined. On the basis of the test results, a proposed truss-arch model, which takes the compatibility of a truss, an arch and steel shape into account, was applied to establish the calculation method for the shear capacity of steel reinforced concrete hollow composite beams. The results indicated that: the specimens with solid section and hollow section both suffered similar failure modes and exhibited similar shear bearing capacities, and the shear bearing capacity decreased with the increase of the aspect ratio. The shear capacity calculated by the JGJ 138-2016 and YB9082-2006 shows high discreteness. The shear strengths obtained by the proposed method(compatible truss-arch model) agreed well with those from the experiment.
引文
[1]杨洋.预制装配型钢混凝土梁负弯矩区抗剪性能及设计方法研究[D].陕西:西安建筑科技大学,2015.Yang Yang.Experimental study on shear performance and design methods of prefabricated steel reinforced concrete(PPSRC)beam under hogging bending moment[D].Shaanxi:Xi’an University of Architecture&Technology,2015.(in Chinese)
[2]郭宇翔.预制装配蜂窝型钢混凝型梁抗剪性能及设计方法试验研究[D].陕西:西安建筑科技大学,2015.Guo Yuxiang.Experimental study on shear performance¨d?1??of prefabricated castellated steel reinforced concrete(PCSRC)beam[D].Shaanxi:Xi’an University of Architecture&Technology,2015.(in Chinese)
[3]Hong W K,Kim J M,Park S C,et al.Composite beam composed of steel and precast concrete.(Modularized Hybrid System,MHS)Part II:analytical investigation[J].Structural Design of Tall&Special Buildings,2009,18(8):891-905.
[4]邓明科,马福栋,李勃志,等.基于修正拉-压杆模型的型钢混凝土深梁受剪承载力分析[J].工程力学,2017,34(12):95-103.Deng Mingke,Ma Fudong,Li Bozhi,et al.Analysis on shear capacity of SRC deep beams based on modified strut-and-tie model[J].Engineering Mechanics,2017,34(12):95-103.(in Chinese)
[5]郑山锁,胡义,车顺利,等.型钢高强高性能混凝土梁è?抗剪承载力试验研究[J].工程力学,2011,28(3):129-135.Zheng Shansuo,Hu Yi,Che Shunli,et al.Experimental study on the shear capacity of SRSHPC beams[J].Engineering Mechanics,2011,28(3):129-135.(in Chinese)
[6]贾金青,姚大立,余芳.预应力型钢超高强混凝土梁受剪承载力试验研究[J].工程力学,2014,31(8):126-133.Jia Jinqing,Yao Dali,Yu Fang.Experimentalè?study onshear capacity of prestressed I-steel ultrahigh reinforced concrete beams[J].Engineering Mechanics,2014,31(8):126 -133.(in Chinese)
[7]Yang Y,Xue Y,Yu Y,et al.Experimental study on flexural performance of partially precast steel reinforced concrete beams[J].Journal of Constructional Steel Research,2017,133:192-201.
[8]杨勇,于云龙,杨洋,等.部分预制装配型钢混凝土梁受剪性能试验研究[J].建筑结构学报,2017,38(6):46-53.Yang Yong,Yu Yunlong,Yang Yang,et al.Experimental study on shear performance of partially precast steel reinforced concrete(PPSRC)beams.[J].Journal of Building Structures,20175,38(6):46-53.(in Chinese)
[9]Yang Y,Yu Y,Guo Y,et al.Experimental study on shear performance of partially precast Castellated Steel Reinforced Concrete(CPSRC)beams[J].Steel&Composite Structures,2016,21(2):289-302.
[10]JGJ 138-2016,组合结构设计规范[S].北京:中国建筑工业出版社,2016.JGJ 138-2016,Code for design of composite structures[S].Beijing:China Architecture&Building Press,2016.(in Chinese)
[11]YB 9082-2006,钢骨混凝土结构技术规程[S].北京:冶金工业出版社,2006.YB 9082-2006,Technical specification of steelreinforced concrete structures[S].Beijing:Metallurgical Industry Press,2006.(in Chinese)
[12]Vecchio F J,Collins M P.The modified compression field theory for reinforced concrete elements subjected to shear[J].ACI Structural Journal,1986,83(2):219-231.
[13]Bentz E C,Vecchio F J,Collins M P.Simplified modified compression field theory for calculating shear strength of reinforced concrete elements[J].ACI Structural Journal,2006,103(4):614-624.
[14]Kim J H,Mander J B.Influence of transverse reinforcement on elastic shear stiffness of cracked concrete elements[J].Engineering Structures,2007,29(8):1798-1807.
[15]Pan Z F,Li B.Truss-Arch model for shear strength of shear-critical reinforced concrete columns[J].Journal of Structural Engineering,2013,139(4):548-560.
[16]Choi K K,Hong G P.Unified shear strength model for reinforced concrete beams-Part II:verification and simplified method[J].ACI Structural Journal,2007,104(2):153-161.
[17]于云龙.部分预制装配型钢混凝土梁基本性能及设计方法研究[D].陕西:西安建筑科技大学,2017.Yu Yunlong.Study on mechanical performance and design method on partially precast steel reinforced concrete beams[D].Shanxi:Xi'an University of Architecture&Technology,2017.(in Chinese)
[18]过镇海.钢筋混凝土原理[M].北京:清华大学出版社,2013.Guo zhenhai.Principle of reinforced concrete[M].Beijing:Tsinghua University Press,2013.(in Chinese)
[2]郭宇翔.预制装配蜂窝型钢混凝型梁抗剪性能及设计方法试验研究[D].陕西:西安建筑科技大学,2015.Guo Yuxiang.Experimental study on shear performance¨d?1??of prefabricated castellated steel reinforced concrete(PCSRC)beam[D].Shaanxi:Xi’an University of Architecture&Technology,2015.(in Chinese)
[3]Hong W K,Kim J M,Park S C,et al.Composite beam composed of steel and precast concrete.(Modularized Hybrid System,MHS)Part II:analytical investigation[J].Structural Design of Tall&Special Buildings,2009,18(8):891-905.
[4]邓明科,马福栋,李勃志,等.基于修正拉-压杆模型的型钢混凝土深梁受剪承载力分析[J].工程力学,2017,34(12):95-103.Deng Mingke,Ma Fudong,Li Bozhi,et al.Analysis on shear capacity of SRC deep beams based on modified strut-and-tie model[J].Engineering Mechanics,2017,34(12):95-103.(in Chinese)
[5]郑山锁,胡义,车顺利,等.型钢高强高性能混凝土梁è?抗剪承载力试验研究[J].工程力学,2011,28(3):129-135.Zheng Shansuo,Hu Yi,Che Shunli,et al.Experimental study on the shear capacity of SRSHPC beams[J].Engineering Mechanics,2011,28(3):129-135.(in Chinese)
[6]贾金青,姚大立,余芳.预应力型钢超高强混凝土梁受剪承载力试验研究[J].工程力学,2014,31(8):126-133.Jia Jinqing,Yao Dali,Yu Fang.Experimentalè?study onshear capacity of prestressed I-steel ultrahigh reinforced concrete beams[J].Engineering Mechanics,2014,31(8):126 -133.(in Chinese)
[7]Yang Y,Xue Y,Yu Y,et al.Experimental study on flexural performance of partially precast steel reinforced concrete beams[J].Journal of Constructional Steel Research,2017,133:192-201.
[8]杨勇,于云龙,杨洋,等.部分预制装配型钢混凝土梁受剪性能试验研究[J].建筑结构学报,2017,38(6):46-53.Yang Yong,Yu Yunlong,Yang Yang,et al.Experimental study on shear performance of partially precast steel reinforced concrete(PPSRC)beams.[J].Journal of Building Structures,20175,38(6):46-53.(in Chinese)
[9]Yang Y,Yu Y,Guo Y,et al.Experimental study on shear performance of partially precast Castellated Steel Reinforced Concrete(CPSRC)beams[J].Steel&Composite Structures,2016,21(2):289-302.
[10]JGJ 138-2016,组合结构设计规范[S].北京:中国建筑工业出版社,2016.JGJ 138-2016,Code for design of composite structures[S].Beijing:China Architecture&Building Press,2016.(in Chinese)
[11]YB 9082-2006,钢骨混凝土结构技术规程[S].北京:冶金工业出版社,2006.YB 9082-2006,Technical specification of steelreinforced concrete structures[S].Beijing:Metallurgical Industry Press,2006.(in Chinese)
[12]Vecchio F J,Collins M P.The modified compression field theory for reinforced concrete elements subjected to shear[J].ACI Structural Journal,1986,83(2):219-231.
[13]Bentz E C,Vecchio F J,Collins M P.Simplified modified compression field theory for calculating shear strength of reinforced concrete elements[J].ACI Structural Journal,2006,103(4):614-624.
[14]Kim J H,Mander J B.Influence of transverse reinforcement on elastic shear stiffness of cracked concrete elements[J].Engineering Structures,2007,29(8):1798-1807.
[15]Pan Z F,Li B.Truss-Arch model for shear strength of shear-critical reinforced concrete columns[J].Journal of Structural Engineering,2013,139(4):548-560.
[16]Choi K K,Hong G P.Unified shear strength model for reinforced concrete beams-Part II:verification and simplified method[J].ACI Structural Journal,2007,104(2):153-161.
[17]于云龙.部分预制装配型钢混凝土梁基本性能及设计方法研究[D].陕西:西安建筑科技大学,2017.Yu Yunlong.Study on mechanical performance and design method on partially precast steel reinforced concrete beams[D].Shanxi:Xi'an University of Architecture&Technology,2017.(in Chinese)
[18]过镇海.钢筋混凝土原理[M].北京:清华大学出版社,2013.Guo zhenhai.Principle of reinforced concrete[M].Beijing:Tsinghua University Press,2013.(in Chinese)
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