配有抗冲切钢筋的板柱节点改进弯剪临界裂缝方法
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摘要
为了能够更准确地计算板柱节点的抗冲切承载力,本文在弯剪临界裂缝方法的基础上,针对第一条弯曲裂缝起点位置的确定和钢筋销栓作用考虑方法两个关键问题,对弯剪临界裂缝方法进行了修正,并在此基础上考虑了抗冲切钢筋的作用,提出了配有抗冲切钢筋的板柱节点弯剪临界裂缝方法。根据47个试验构件数据,对比分析了中国规范GB50010-2010、美国规范ACI318-14、英国规范BS8110-97、欧洲规范CEB-FIP MC2010,以及本文修正后的弯剪临界裂缝方法的计算结果,发现本文修正后的弯剪临界裂缝方法计算效果最好。
In order to calculate the punching bearing capacity of slab-column connections more accurately,this paper modified the bending-shearing critical crack method and took the dowel action into account based on the method which consider both the location of the first crack and the function of the rebar, and provided the method of considering the shear reinforcement for slab-column connections with transverse reinforcement. Detailed comparative analysis has been conducted among the results of 47 components based on the GB 50010-2010( China), ACI318-14( America), BS 8110-97( Britain), and CEB-FIP MC2010( Europe) and the improved bending-shearing critical crack method, respectively. The results show that the analysis model presented in this paper can calculate the punching capacity of the connections more accurately.
In order to calculate the punching bearing capacity of slab-column connections more accurately,this paper modified the bending-shearing critical crack method and took the dowel action into account based on the method which consider both the location of the first crack and the function of the rebar, and provided the method of considering the shear reinforcement for slab-column connections with transverse reinforcement. Detailed comparative analysis has been conducted among the results of 47 components based on the GB 50010-2010( China), ACI318-14( America), BS 8110-97( Britain), and CEB-FIP MC2010( Europe) and the improved bending-shearing critical crack method, respectively. The results show that the analysis model presented in this paper can calculate the punching capacity of the connections more accurately.
引文
[1]JGJ/T 268-2012现浇混凝土空心楼盖技术规程[S].北京:中国建筑工业出版社,2012JGJ/T 268-2012 Technical specification for cast-in-situ concrete hollow floor structure[S].Beijing:China Archetecture&Building Press,2012
[2]Elstner R C,Hognestad E.Shearing strength of reinforced concrete slabs[J].ACI Journal Proceeding,1956,53(7):29-58
[3]Di Stasio Sr J,Van Buren M P.Transfer of bending moment between flat plate floor and column[J].ACI Journal Proceedings,1960,57(9):299-314
[4]Kinnunen S,Nylander H.Punching of concrete slabs without shear reinforcement[M].Sweden:Elander Boktryckeri Aktiebolag,1960
[5]Br(?)strup M W,Nielsen M P,Jensen B C,et al.Axisymmetric punching of plain and reinforced concrete[M].Structural Research Laboratory,Technical University of Denmark,1976
[6]Van Dusen M H.Unbalanced moment and shear transfer at slab column connections:a literature review[D].University of Toronto,1985
[7]Alexander S B,Simmonds S H.Ultimate strength of slab-column connections[J].ACI Structural Journal,1987,84(3):255-261
[8]Simmonds S H,Alexander S D B.Truss model for edge columnslab connections[J].ACI Structural Journal,1987,84(4):296-303
[9]Bazant Z P,Cao Z.Size effect in punching shear failure of slabs[J].ACI Structural Journal,1987,84(1):44-53(下转第104页)
[10]黄川腾.空心楼盖结构分析方法及板柱节点冲切问题研究[D].重庆:重庆大学,2015Huang Chuanteng.Study on the analysis methods of hollow floor and punching issues of slab-column connection[D].Chongqing:Chongqing University,2015
[11]Park H G,Kang S,Choi K K.Analytical model for shear strength of ordinary and prestressred concrete beams[J].Engineering Structures,2013,46:94-103
[12]Aurelio Muttoni.Punching shear strength of reinforced roncrete slabs without transverse reinforcement[J].ACI Structural Journal,2008,105(4):440-450
[13]丁大钧.现代混凝土结构学[M].北京:中国建筑工业出版社,2000Ding Dajun.Modern concrete struc ture science[M].Beijing:China Architecture&Building Press,2000
[14]K-E Ramdane.Puching shear of high performance concrete slabs[C].4th international Symposium on utilization of Highstrength/H igh-performance concrete,Paris,1996
[15]P.E.Regan.Symmetric punching of reinforced concrete slabs[J].Magazine of Concrete Research,1986
[16]Menetrey P.Analytical computation of the punching strength of reinforced concrete[J].ACI Structural Journal,1996.93(5):503-511
[17]GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010GB 50010-2010 Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010
[18]ACI 318-14 Building code requirements for structural concrete and commentary[S].Detroit:American Concrete Institute,2014
[19]BS 8110-97 Structural use of concrete,part 1:code of practicefor design and construction[S].London:British Standards Institution,1997
[20]CEB-FIP Mode code for concrete structures 2010[S].Berlin:Wilhelm Ernst&Sohn,2010
[21]Matthys S,Taerwe L.Concrete slabs reinforced with FRP grids.Ⅱ:Punching resistance[J].Journal of Composites for Construction,2000,4(3):154-161
[2]Elstner R C,Hognestad E.Shearing strength of reinforced concrete slabs[J].ACI Journal Proceeding,1956,53(7):29-58
[3]Di Stasio Sr J,Van Buren M P.Transfer of bending moment between flat plate floor and column[J].ACI Journal Proceedings,1960,57(9):299-314
[4]Kinnunen S,Nylander H.Punching of concrete slabs without shear reinforcement[M].Sweden:Elander Boktryckeri Aktiebolag,1960
[5]Br(?)strup M W,Nielsen M P,Jensen B C,et al.Axisymmetric punching of plain and reinforced concrete[M].Structural Research Laboratory,Technical University of Denmark,1976
[6]Van Dusen M H.Unbalanced moment and shear transfer at slab column connections:a literature review[D].University of Toronto,1985
[7]Alexander S B,Simmonds S H.Ultimate strength of slab-column connections[J].ACI Structural Journal,1987,84(3):255-261
[8]Simmonds S H,Alexander S D B.Truss model for edge columnslab connections[J].ACI Structural Journal,1987,84(4):296-303
[9]Bazant Z P,Cao Z.Size effect in punching shear failure of slabs[J].ACI Structural Journal,1987,84(1):44-53(下转第104页)
[10]黄川腾.空心楼盖结构分析方法及板柱节点冲切问题研究[D].重庆:重庆大学,2015Huang Chuanteng.Study on the analysis methods of hollow floor and punching issues of slab-column connection[D].Chongqing:Chongqing University,2015
[11]Park H G,Kang S,Choi K K.Analytical model for shear strength of ordinary and prestressred concrete beams[J].Engineering Structures,2013,46:94-103
[12]Aurelio Muttoni.Punching shear strength of reinforced roncrete slabs without transverse reinforcement[J].ACI Structural Journal,2008,105(4):440-450
[13]丁大钧.现代混凝土结构学[M].北京:中国建筑工业出版社,2000Ding Dajun.Modern concrete struc ture science[M].Beijing:China Architecture&Building Press,2000
[14]K-E Ramdane.Puching shear of high performance concrete slabs[C].4th international Symposium on utilization of Highstrength/H igh-performance concrete,Paris,1996
[15]P.E.Regan.Symmetric punching of reinforced concrete slabs[J].Magazine of Concrete Research,1986
[16]Menetrey P.Analytical computation of the punching strength of reinforced concrete[J].ACI Structural Journal,1996.93(5):503-511
[17]GB 50010-2010混凝土结构设计规范[S].北京:中国建筑工业出版社,2010GB 50010-2010 Code for design of concrete structures[S].Beijing:China Architecture&Building Press,2010
[18]ACI 318-14 Building code requirements for structural concrete and commentary[S].Detroit:American Concrete Institute,2014
[19]BS 8110-97 Structural use of concrete,part 1:code of practicefor design and construction[S].London:British Standards Institution,1997
[20]CEB-FIP Mode code for concrete structures 2010[S].Berlin:Wilhelm Ernst&Sohn,2010
[21]Matthys S,Taerwe L.Concrete slabs reinforced with FRP grids.Ⅱ:Punching resistance[J].Journal of Composites for Construction,2000,4(3):154-161