无腹筋BFRP筋混凝土深梁受剪性能研究
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摘要
在对称集中荷载作用下,对7根无腹筋BFRP筋混凝土深梁进行受剪试验,分析了构件的裂缝发展、破坏形态及不同剪跨比、BFRP筋配筋率、玄武岩纤维体积掺率对构件跨中挠度、开裂荷载和极限荷载的影响。试验结果表明:各试验梁均发生剪切破坏;相同荷载作用下,跨中挠度随着剪跨比的增大而增大,随着配筋率及玄武岩纤维体积掺率的增大而减小;开裂荷载与极限荷载均随着剪跨比的增大而减小,随着配筋率及玄武岩纤维体积掺率的增大而增大。参照相关规范对试验梁抗剪承载力进行计算,研究结果表明美国ACI 440. 1R-06规范计算值与试验值比较吻合,加拿大CSA. S 806-12规范稳定性较好,中国GB 50608—10规范相对保守,建议采用美国ACI440. 1R-06规范对无腹筋BFRP筋混凝土深梁进行抗剪承载力计算。
In order to study the influence of different shear span ratio,reinforcement ratio and basalt fiber volume fraction on the deflection,cracking load and ultimate bearing capacity,7 basalt fiber reinforced polymer( BFRP) reinforced concrete deep beams without stirrups were investigated,and the crack development and failure mode were analyzed. The research results can be obtained as follows. The failure mode of all beams is shear failure;Under the same load,the mid-span deflection of specimen can be improved by the increase of shear span ratio,while will be reduced by the increase of BFRP reinforcement ratio and basalt fiber volume fraction. The cracking load and ultimate load of beams are weakened with the shear span ratio increases,and will be increased with the increase of longitudinal reinforcement ratio and basalt fiber volume fraction. Calculation of shear capacity of test beams was performed by reference to relevant specifications,and it is found that shear design equations of the ACI 440.1R-06 code were better predictions,the predications of CSA. S 806-12 code were more stable and the GB 50608—10 were relatively conservative. The ACI440.1R-06 code is suggested to be used to calculate the shear capacity of BFRP reinforced concrete deep beams without stirrups.
In order to study the influence of different shear span ratio,reinforcement ratio and basalt fiber volume fraction on the deflection,cracking load and ultimate bearing capacity,7 basalt fiber reinforced polymer( BFRP) reinforced concrete deep beams without stirrups were investigated,and the crack development and failure mode were analyzed. The research results can be obtained as follows. The failure mode of all beams is shear failure;Under the same load,the mid-span deflection of specimen can be improved by the increase of shear span ratio,while will be reduced by the increase of BFRP reinforcement ratio and basalt fiber volume fraction. The cracking load and ultimate load of beams are weakened with the shear span ratio increases,and will be increased with the increase of longitudinal reinforcement ratio and basalt fiber volume fraction. Calculation of shear capacity of test beams was performed by reference to relevant specifications,and it is found that shear design equations of the ACI 440.1R-06 code were better predictions,the predications of CSA. S 806-12 code were more stable and the GB 50608—10 were relatively conservative. The ACI440.1R-06 code is suggested to be used to calculate the shear capacity of BFRP reinforced concrete deep beams without stirrups.
引文
[1]刘喜,王征,吴涛. FRP筋混凝土梁挠度与裂缝宽度计算模型分析[J].建筑科学与工程学报,2017,34(5):163-170.
[2]毕巧巍.玄武岩纤维混凝土的微结构及BFRP筋纤维混凝土梁斜截面承载力试验研究[D].大连:大连理工大学,2012:5-7.
[3]中华人民共和国住房和城乡建设部.纤维增强复合材料建设工程应用技术规范:GB 50608—10[S].北京:中国计划出版社,2010.
[4] Guide for the design and construction of structural concrete reinforced with FRP bars:ACI 440. 1R-06[S]. Farmington Hills:ACI Committee,2006.
[5] Design and construction of buildings components with fiber reinforced polymers:CSA.S 806-12[S]. Toronto:Canadian Standards Association,2012.
[6] Building code requirements for structural concrete and commentary:ACI 318-11[S]. Farmington Hills:American Concrete Institute,2011.
[7]韩定杰,刘华新.无腹筋玄武岩纤维复材筋再生混凝土深受弯构件抗剪性能[J].工业建筑,2017,47(11):28-34.
[8]吴涛,刘喜,王宁宁,等.高强轻骨料混凝土深受弯构件受剪性能试验研究[J].土木工程学报,2014,47(10):40-48.
[9] Russo G,Venir R,Pauletta M. Reinforced concrete deep beamsshear strength model and design formula[J]. ACI Structural Journal,2005,102(3):429-437.
[10]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB50010—15[S].北京:中国建筑工业出版社,2015.
[11] Building code requirements for structural concrete and commentary:ACI 318-99[S]. Farmington Hills:American Concrete Institute,1999.
[12] American association of state highway and transportation officials load and resistance factor design:AASHTO-10[S]. Washington D C:American Association of State Highway and Transportation Officials,2010.
[13] European 2:Design of concrete structures:EC2-04[S]. Brussels:European Committee for Standardization,2004.
[14] Design of concrete structures:CSA A23.3-04[S]. Toronto:Canadian Standards Association,2004.
[15]张晓亮,屈文俊.无腹筋GFRP筋混凝土梁抗剪性能试验[J].中国公路学报,2010,23(5):51-57.
[16]Issa M A,Ovitigala T,Ibrahim M. Shear behavior of basalt fiber reinforced concrete beams with and without basalt FRP stirrups[J].Journal of Composites for Construction,2016,20(4):04015083-1-11.
[17] Chowdhury M A,Zahid Z I,Islam M M. Development of shear capacity prediction model for FRP-RC beam without web reinforcement[J]. Materials Science and Engineering,2016,(11):1-19.
[18] Kara I F. Prediction of shear strength of FRP-reinforced concrete beams without stirrups based on genetic programming[J].Advances in Engineering Software,2011,42(6):295-304.
[19] Nasrollahzadeh K,Basiri M M. Prediction of shear strength of FRP reinforced concrete beams using fuzzy inference system[J]. Expert Systems with Applications,2014,41(4):1006-1020.
[20]师晓权,张志强,李志业,等. GFRP筋混凝土梁抗剪承载力影响因素[J].西南交通大学学报,2010,45(6):898-913.
[21] Yost J R,Gross S P,Dinehart D W. Shear strength of normal strength concrete beams reinforced with deformed GFRP bars[J].Journal of Composites for Construction,2001,5(4):268-275.
[22] Gross S P,Yost J R,Dinehart D W,et al. Shear strength of normal and high strength concrete beams reinforced with GFRP reinforcing bars[C]//Conference on High Performance Materials in Bridges.Kona:2003:426-437.
[23] Refai A E,Abed F. Concrete contribution to shear strength of beams reinforced with basalt Fiber-Reinforced bars[J]. Journal of Composites for Construction,2015,20(4):04015028-1-13.
[2]毕巧巍.玄武岩纤维混凝土的微结构及BFRP筋纤维混凝土梁斜截面承载力试验研究[D].大连:大连理工大学,2012:5-7.
[3]中华人民共和国住房和城乡建设部.纤维增强复合材料建设工程应用技术规范:GB 50608—10[S].北京:中国计划出版社,2010.
[4] Guide for the design and construction of structural concrete reinforced with FRP bars:ACI 440. 1R-06[S]. Farmington Hills:ACI Committee,2006.
[5] Design and construction of buildings components with fiber reinforced polymers:CSA.S 806-12[S]. Toronto:Canadian Standards Association,2012.
[6] Building code requirements for structural concrete and commentary:ACI 318-11[S]. Farmington Hills:American Concrete Institute,2011.
[7]韩定杰,刘华新.无腹筋玄武岩纤维复材筋再生混凝土深受弯构件抗剪性能[J].工业建筑,2017,47(11):28-34.
[8]吴涛,刘喜,王宁宁,等.高强轻骨料混凝土深受弯构件受剪性能试验研究[J].土木工程学报,2014,47(10):40-48.
[9] Russo G,Venir R,Pauletta M. Reinforced concrete deep beamsshear strength model and design formula[J]. ACI Structural Journal,2005,102(3):429-437.
[10]中华人民共和国住房和城乡建设部.混凝土结构设计规范:GB50010—15[S].北京:中国建筑工业出版社,2015.
[11] Building code requirements for structural concrete and commentary:ACI 318-99[S]. Farmington Hills:American Concrete Institute,1999.
[12] American association of state highway and transportation officials load and resistance factor design:AASHTO-10[S]. Washington D C:American Association of State Highway and Transportation Officials,2010.
[13] European 2:Design of concrete structures:EC2-04[S]. Brussels:European Committee for Standardization,2004.
[14] Design of concrete structures:CSA A23.3-04[S]. Toronto:Canadian Standards Association,2004.
[15]张晓亮,屈文俊.无腹筋GFRP筋混凝土梁抗剪性能试验[J].中国公路学报,2010,23(5):51-57.
[16]Issa M A,Ovitigala T,Ibrahim M. Shear behavior of basalt fiber reinforced concrete beams with and without basalt FRP stirrups[J].Journal of Composites for Construction,2016,20(4):04015083-1-11.
[17] Chowdhury M A,Zahid Z I,Islam M M. Development of shear capacity prediction model for FRP-RC beam without web reinforcement[J]. Materials Science and Engineering,2016,(11):1-19.
[18] Kara I F. Prediction of shear strength of FRP-reinforced concrete beams without stirrups based on genetic programming[J].Advances in Engineering Software,2011,42(6):295-304.
[19] Nasrollahzadeh K,Basiri M M. Prediction of shear strength of FRP reinforced concrete beams using fuzzy inference system[J]. Expert Systems with Applications,2014,41(4):1006-1020.
[20]师晓权,张志强,李志业,等. GFRP筋混凝土梁抗剪承载力影响因素[J].西南交通大学学报,2010,45(6):898-913.
[21] Yost J R,Gross S P,Dinehart D W. Shear strength of normal strength concrete beams reinforced with deformed GFRP bars[J].Journal of Composites for Construction,2001,5(4):268-275.
[22] Gross S P,Yost J R,Dinehart D W,et al. Shear strength of normal and high strength concrete beams reinforced with GFRP reinforcing bars[C]//Conference on High Performance Materials in Bridges.Kona:2003:426-437.
[23] Refai A E,Abed F. Concrete contribution to shear strength of beams reinforced with basalt Fiber-Reinforced bars[J]. Journal of Composites for Construction,2015,20(4):04015028-1-13.