配栓钉的钢筋混凝土双向板受力性能试验研究
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摘要
为研究配置不同参数栓钉钢筋混凝土双向板的受力性能,完成了7块配置栓钉的双向板柱节点冲切试验,主要研究栓钉间距、直径、高度、强度和布置形式等参数变化对受力性能的影响,采用静力加载方式模拟配置栓钉的板柱节点破坏全过程。对比分析试验结果发现,增大栓钉直径、栓径高度或提高栓钉强度均能改善试件抗冲切性能,其中,增大直径效果最为明显,抗变形能力提高幅度达到36%;加大栓钉间距和减小栓钉高度对改善试件抗冲切性能不利,承载能力和抗变形能力均有不同程度降低;对比3种不同栓钉布置形式发现,采用相同数量栓钉放射布置和增加每圈栓钉数量的正交布置,均有利于提高试件抗冲切能力,但前者更经济。对比分析相关规范计算结果和试验结果发现,规范对配栓钉板柱结构的计算结果具有足够的安全储备,但对于反映试验结果的实质不够充分,特别是栓钉对板的抗冲切性能的贡献有所低估。
This paper aims to study the mechanical performances of reinforced concrete two-way slab with different stud parameters.The experimental study on seven reinforced concrete two-way slab-column connections with punching shear studs was conducted.The main parameters investigated were spacing of stud,the diameter of the stud,the height of the stud,the strength of the stud and the arrangement of the stud.The whole process of damage of slab-column connections with studs was simulated using static loading method.The results show that increasing the diameter of the stud,the height of the stud or the strength of the stud can improve the anti-punching shear performance of the specimen.The increase in diameter is the most obvious,and the decrease in deformation is up to 36%.Increasing stud spacing and reducing stud height weaken the load-bearing capacity and thus the deformation are increased.By comparing three different stud layouts,it is found that using radiation type contributes better to the improvement of the specimen anti-punching shear capacity,and the former was more economical.Then,the accuracy of the test results was verified by comparing the calculated results of relevant specifications with the test results.The results show that the safety reserve of specification calculation results of slabcolumn structure with studs is sufficient.However,it is not enough to reflect the nature of test results,especially contributions of the stud to anti-punching shear performance of slabs are underestimated.
This paper aims to study the mechanical performances of reinforced concrete two-way slab with different stud parameters.The experimental study on seven reinforced concrete two-way slab-column connections with punching shear studs was conducted.The main parameters investigated were spacing of stud,the diameter of the stud,the height of the stud,the strength of the stud and the arrangement of the stud.The whole process of damage of slab-column connections with studs was simulated using static loading method.The results show that increasing the diameter of the stud,the height of the stud or the strength of the stud can improve the anti-punching shear performance of the specimen.The increase in diameter is the most obvious,and the decrease in deformation is up to 36%.Increasing stud spacing and reducing stud height weaken the load-bearing capacity and thus the deformation are increased.By comparing three different stud layouts,it is found that using radiation type contributes better to the improvement of the specimen anti-punching shear capacity,and the former was more economical.Then,the accuracy of the test results was verified by comparing the calculated results of relevant specifications with the test results.The results show that the safety reserve of specification calculation results of slabcolumn structure with studs is sufficient.However,it is not enough to reflect the nature of test results,especially contributions of the stud to anti-punching shear performance of slabs are underestimated.
引文
[1]CARVALHO A L,MELO G S.Punching shear in post-tensioned flat slabs with stud rail shear reinforcement[J].ACI Structural Journal,2011,108(5):523-531.
[2]LIPS S,RUIZ F M,MUTTONI A.Experimental investigation on punching strength and deformation capacity of shear-reinforced slabs[J].ACI Structural Journal,2012,109(6):889-900.
[3]BRANTSCHEN F,FARIA D M V,FERNANDEZ RUIZ M,et al.Bond behaviour of straight,hooked,U-shaped and headed bars in cracked concrete[J].Structural Concrete,2016,17(5):799-810.
[4]RICKER M,HAUSLER F,RANDL N.Punching strength of flat plates reinforced with UHPC and double-headed studs[J]. Engineering Structures,2017,136:345-354.
[5]ACI Committee 318.Building code requirements for structural concrete and commentary:ACI 318-14[S].American Concrete Institute,2014.
[6]混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2010.Code for design of concrete structures:GB 50010-2010[S].Beijing:China Architecture &Building Press,2010.(in Chinese)
[7]YAMAD T,NANNI A,ENDO K.Punching shear resistance of flat slabs:influence of reinforcement type and ratio[J].ACI Structural Journal,1992,88(4):555-564
[8]GHALI A.An efficient solution to punching of slabs[J].Concrete International,1989,102(2):50-54.
[9] GHALI A, YOUAKIM S A. Headed studs in concrete:State of the art[J].ACI Structural Journal,2005,102(5):657-667.
[10]ELGABRY A A,GHALI A.Design of stud-shear reinforcement for slabs[J].ACI Structural Journal,1990,87(3):350-361
[11]GUAN H,LOO Y C.Failure analysis of column-slab connections with stud shear reinforcement[J].Canadian Journal of Civil Engineering,2003,30(5):934-944.
[12] GHALI A, YOUAKIM S A. Headed studs in concrete:State of the art[J].ACI Structural Journal,2005,102(5):657-667
[13]舒兆发.配置受冲切锚栓的混凝土板柱连接的试验研究[J].建筑结构学报,1999,20(1):50-58.SHU Z F.Experimental investigation on concrete slabcolumn connections with stud shear reinforcement[J].Journal of Building Structures,1999,20(1):50-58.(in Chinese)
[14]代伟明,张扬,钱稼茹,等.高重剪比下配置栓钉的板柱节点抗震性能试验研究[J].建筑结构学报,2012,33(7):126-132.DAI W M, ZHANG Y, QIAN J R, et al.Experimental study on seismic performance of slabcolumn connection with shear studs under large gravityshear ratio[J].Journal of Building Structures,2012,33(7):126-132.(in Chinese)
[15]金玉,易伟建,胡岚,等.配置抗剪栓钉的钢筋混凝土单向板柱节点受剪性能试验研究[J].建筑结构学报,2015,36(8):66-72.JIN Y,YI W J,HU L,et al.Experimental study on shear performance of reinforced concrete one-way slabcolumn connection with shear studs[J].Journal of Building Structures,2015,36(8):66-72.(in Chinese)
[16]金玉,易伟建,胡岚,等.配置抗冲切键的钢筋混凝土板柱节点性能试验研究[J].工业建筑,2017,47(4):60-64,110.JIN Y,YI W J,HU L,et al.Experimental study of performance of reinforced concrete slab-column connection with punching shear keys[J].Industrial Construction,2017,47(4):60-64,110.(in Chinese)
[17]Model code for concrete structures:CEB-FIP,2010[S]. Comite'Euro-International de Beton/Federation International de la Precontrainte, Lausanne,Switzerland,2010.
[18]Structural use of concrete,PartⅠ:Code of practice for design and construction:BS 8110,1997[S].British Standards Institution,London,1997:151-167.
[19]LEE J H,YOON Y S,LEE S H,et al.Enhancing performance of slab-column connections[J].Journal of Structural Engineering,2008,134(3):448-457.
[20]GUAN H,LOO Y C.Failure analysis of column-slab connections with stud shear reinforcement[J].Canadian Journal of Civil Engineering,2003,30(5):934-944.
[21]PARK H G,CHOI K K,CHUNG L.Strain-based strength model for direct punching shear of interior slab–column connections[J].Engineering Structures,2011,33(3):1062-1073.
[22]HAWILEH R,NASER M,MALHAS F.Finite element modeling of punching shear in two-way slabs reinforced with high-strength steel[C]//Structures Congress 2013,May 2-4,2013,Pittsburgh,Pennsylvania,USA,2013.
[23]ZOHREVAND P,YANG X,JIAO X,et al.Punching shear enhancement of flat slabs with partial use of ultrahigh-performance concrete[J].Journal of Materials in Civil Engineering,2015,27(9):04014255.
[2]LIPS S,RUIZ F M,MUTTONI A.Experimental investigation on punching strength and deformation capacity of shear-reinforced slabs[J].ACI Structural Journal,2012,109(6):889-900.
[3]BRANTSCHEN F,FARIA D M V,FERNANDEZ RUIZ M,et al.Bond behaviour of straight,hooked,U-shaped and headed bars in cracked concrete[J].Structural Concrete,2016,17(5):799-810.
[4]RICKER M,HAUSLER F,RANDL N.Punching strength of flat plates reinforced with UHPC and double-headed studs[J]. Engineering Structures,2017,136:345-354.
[5]ACI Committee 318.Building code requirements for structural concrete and commentary:ACI 318-14[S].American Concrete Institute,2014.
[6]混凝土结构设计规范:GB 50010—2010[S].北京:中国建筑工业出版社,2010.Code for design of concrete structures:GB 50010-2010[S].Beijing:China Architecture &Building Press,2010.(in Chinese)
[7]YAMAD T,NANNI A,ENDO K.Punching shear resistance of flat slabs:influence of reinforcement type and ratio[J].ACI Structural Journal,1992,88(4):555-564
[8]GHALI A.An efficient solution to punching of slabs[J].Concrete International,1989,102(2):50-54.
[9] GHALI A, YOUAKIM S A. Headed studs in concrete:State of the art[J].ACI Structural Journal,2005,102(5):657-667.
[10]ELGABRY A A,GHALI A.Design of stud-shear reinforcement for slabs[J].ACI Structural Journal,1990,87(3):350-361
[11]GUAN H,LOO Y C.Failure analysis of column-slab connections with stud shear reinforcement[J].Canadian Journal of Civil Engineering,2003,30(5):934-944.
[12] GHALI A, YOUAKIM S A. Headed studs in concrete:State of the art[J].ACI Structural Journal,2005,102(5):657-667
[13]舒兆发.配置受冲切锚栓的混凝土板柱连接的试验研究[J].建筑结构学报,1999,20(1):50-58.SHU Z F.Experimental investigation on concrete slabcolumn connections with stud shear reinforcement[J].Journal of Building Structures,1999,20(1):50-58.(in Chinese)
[14]代伟明,张扬,钱稼茹,等.高重剪比下配置栓钉的板柱节点抗震性能试验研究[J].建筑结构学报,2012,33(7):126-132.DAI W M, ZHANG Y, QIAN J R, et al.Experimental study on seismic performance of slabcolumn connection with shear studs under large gravityshear ratio[J].Journal of Building Structures,2012,33(7):126-132.(in Chinese)
[15]金玉,易伟建,胡岚,等.配置抗剪栓钉的钢筋混凝土单向板柱节点受剪性能试验研究[J].建筑结构学报,2015,36(8):66-72.JIN Y,YI W J,HU L,et al.Experimental study on shear performance of reinforced concrete one-way slabcolumn connection with shear studs[J].Journal of Building Structures,2015,36(8):66-72.(in Chinese)
[16]金玉,易伟建,胡岚,等.配置抗冲切键的钢筋混凝土板柱节点性能试验研究[J].工业建筑,2017,47(4):60-64,110.JIN Y,YI W J,HU L,et al.Experimental study of performance of reinforced concrete slab-column connection with punching shear keys[J].Industrial Construction,2017,47(4):60-64,110.(in Chinese)
[17]Model code for concrete structures:CEB-FIP,2010[S]. Comite'Euro-International de Beton/Federation International de la Precontrainte, Lausanne,Switzerland,2010.
[18]Structural use of concrete,PartⅠ:Code of practice for design and construction:BS 8110,1997[S].British Standards Institution,London,1997:151-167.
[19]LEE J H,YOON Y S,LEE S H,et al.Enhancing performance of slab-column connections[J].Journal of Structural Engineering,2008,134(3):448-457.
[20]GUAN H,LOO Y C.Failure analysis of column-slab connections with stud shear reinforcement[J].Canadian Journal of Civil Engineering,2003,30(5):934-944.
[21]PARK H G,CHOI K K,CHUNG L.Strain-based strength model for direct punching shear of interior slab–column connections[J].Engineering Structures,2011,33(3):1062-1073.
[22]HAWILEH R,NASER M,MALHAS F.Finite element modeling of punching shear in two-way slabs reinforced with high-strength steel[C]//Structures Congress 2013,May 2-4,2013,Pittsburgh,Pennsylvania,USA,2013.
[23]ZOHREVAND P,YANG X,JIAO X,et al.Punching shear enhancement of flat slabs with partial use of ultrahigh-performance concrete[J].Journal of Materials in Civil Engineering,2015,27(9):04014255.