考虑钢筋偏心影响的铸造半灌浆套筒连接性能试验研究
引用文献：
苏立坡，王占文，刘子业，车文鹏. 考虑钢筋偏心影响的铸造半灌浆套筒连接性能试验研究[J]. 建筑结构，2023，48（08）：78-85.
SU Lipo， WANG Zhanwen， LIU Ziye， CHE Wenpeng. Experimental study on connection performance of cast semi-grouted sleeve considering influence of rebar eccentricity[J]. Building Structure，2023,48（08）：78-85.
摘要：为研究钢筋偏心(垂直偏心和斜向偏心)对铸造半灌浆套筒连接性能的影响，设计制作了18个铸造半灌浆套筒连接试件，通过拉伸试验研究钢筋偏心对试件破坏形态、强度与变形性能、灌浆料损伤程度的影响。结果表明，钢筋垂直偏心和斜向偏心对接头极限承载力影响较小，主要影响接头的变形性能，且出浆口所在截面为最危险截面；钢筋垂直偏心使贴近钢筋一侧筒壁应变大于另一侧对称位置应变，且钢筋斜向偏心试件具有相同的应变分布规律；钢筋居中试件灌浆料损伤深度最小，斜向偏心试件损伤深度最大，垂直偏心试件次之。最后，建立了铸造半灌浆套筒连接接头极限承载力分析模型，接头极限承载力计算结果与试验结果吻合良好，误差小于10%。
关键词：钢筋偏心；铸造半灌浆套筒；损伤深度；单向拉伸；连接接头；极限承载力；分析模型；
基金：国家自然科学基金项目(51678236)；河北省自然科学基金项目(E2020209056)。
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[12] CHEN J,WANG Z,LIU Z,et al.Experimental investigation of mechanical properties of steel half-grouted sleeve splice with rebar bonding defects[J].Journal of Building Engineering,2022,50:104113.
[13] HOSSEINI S J A,RAHMAN A B A.Effects of spiral diameter on the bond stress-slip relationship in grouted sleeve connector[J].Malaysian Construction Research Journal (MCRJ),2015,12(1):1-20.
[14] LU Z,HUANG J,LI Y,et al.Mechanical behaviour of grouted sleeve splice under uniaxial tensile loading[J].Engineering Structures,2019,186:421-435.
[15] LING J H,RAHMAN A B A,IBRAHIM I S,et al.Behaviour of grouted pipe splice under incremental tensile load[J].Construction and Building Materials,2012,33:90-98.
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[18] LING J H,RAHMAN A B A,IBRAHIM I S,et al.Tensile capacity of grouted splice sleeves[J].Engineering Structures,2016,111:285-296.
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[3] AMELI M J,PANTELIDES C P.Seismic analysis of precast concrete bridge columns connected with grouted splice sleeve connectors[J].Journal of Structural Engineering,2016,143(2):04016176.
[4] YAN Q,CHEN T,XIE Z.Seismic experimental study on a precast concrete beam-column connection with grout sleeves[J].Engineering Structures,2018,155:330-344.
[5] XU T,Li Q,ZHAO R,et al.On the early-age bond-slip behavior of an eccentric bar embedded in a grouted sleeve[J].Engineering Structures,2019,190:160-170.
[6] ZHENG Y F,GUO Z X.An experimental study of new grouted deformed pipe splice under incremental tensile load[C]//The 13th International Symposium on Structural Engineering.Nanjing:National Natural Science Foundation of China,2014:20-25.
[7] 郑清林，王霓，陶里，等.灌浆缺陷对钢筋套筒灌浆连接试件性能影响的试验研究[J].建筑科学，2017,33(5):61-68.
[8] 孙彬，毛诗洋，欧阳志鹏，等.灌浆饱满度对半灌浆套筒钢筋连接性能影响的试验研究[J].建筑结构，2020,50(9):1-6.
[9] 李猛，潘志宏，宛青云，等.考虑偏心影响的灌浆套筒连接受力性能研究[J].江苏科技大学学报(自然科学版),2019,33(6):99-105.
[10] HUANG Y,ZHU Z G,NATIO C J,et al.Tensile behavior of half grouted sleeve connections:experimental study and analytical modeling[J].Construction and Building Materials,2017,152:96-104.
[11] CHEN J,WANG Z,LIU Z,et al.Experimental investigation of mechanical behaviour of rebar in steel half-grouted sleeve connections with defects in water/binder ratio[J].Structures,2020,26:487-500.
[12] CHEN J,WANG Z,LIU Z,et al.Experimental investigation of mechanical properties of steel half-grouted sleeve splice with rebar bonding defects[J].Journal of Building Engineering,2022,50:104113.
[13] HOSSEINI S J A,RAHMAN A B A.Effects of spiral diameter on the bond stress-slip relationship in grouted sleeve connector[J].Malaysian Construction Research Journal (MCRJ),2015,12(1):1-20.
[14] LU Z,HUANG J,LI Y,et al.Mechanical behaviour of grouted sleeve splice under uniaxial tensile loading[J].Engineering Structures,2019,186:421-435.
[15] LING J H,RAHMAN A B A,IBRAHIM I S,et al.Behaviour of grouted pipe splice under incremental tensile load[J].Construction and Building Materials,2012,33:90-98.
[16] Building code requirements for structural concrete and commentary:ACI-318[S].Farmington Hills:American Concrete Institute,2011.
[17] 钢筋套筒灌浆连接应用技术规程：JGJ 355—2015 [S].北京：中国建筑工业出版社，2015.
[18] LING J H,RAHMAN A B A,IBRAHIM I S,et al.Tensile capacity of grouted splice sleeves[J].Engineering Structures,2016,111:285-296.
[19] UNTRAUER R E,HENRY R L.Influence of normal pressure on bond strength[J].ACI Journal Proceedings,1965,62(5):577-586.
Experimental study on connection performance of cast semi-grouted sleeve considering influence of rebar eccentricity
Abstract: In order to study the influence of rebar eccentricity(vertical eccentricity and oblique eccentricity) on the connection performance of cast semi-grouting sleeve, 18 cast semi-grouting sleeve connection specimens were designed and fabricated, and the influence of rebar eccentricity on the failure modes, strength and deformation properties, damage degree of grout were studied by tensile test. The results show that the vertical eccentricity and oblique eccentricity of the rebar have little influence on the ultimate bearing capacity of the splices, which mainly affect the deformation performance of the splices, and the section where the slurry outlet located is the most dangerous section. The vertical eccentricity of the rebar makes the strain of the cylinder wall close to the rebar larger than that of the symmetrical position on the other side, and the rebar oblique eccentric specimens have the same strain distribution law; The damage depth of grout of rebar centered specimen is the smallest, that of oblique eccentric specimen is the largest, and that of vertical eccentric specimen is the second. Finally the analytical model was established to predict the ultimate bearing capacity of cast semi-grouted sleeve connection splices. The calculated results of the splices are in good agreement with the experimental results, and the error is less than 10%.
Keywords: rebar eccentricity; cast semi-grouted sleeve; damage depth; uniaxial tensile; connection splices; ultimate bearing capacity; analytical mode
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