Bond-Slip Behavior Between Reinforcement Bars and High-Strength Lightweight Aggregate Concrete

doi:10.12068/j.issn.1005-3026.2022.02.017

Abstract

Abstract: Nine groups of pull-out tests on the bond-slip behavior between reinforcement bars and lightweight aggregate concrete were completed.The effect of lightweight aggregate concrete strength， anchorage length， coarse aggregate type and bar diameter on bond strength was analyzed. Combined with the test results， the analytical solution of bond strength of lightweight aggregate concrete was given by using thick wall model， and a constitutive model between reinforcement and lightweight aggregate concrete was established.Test results indicate that the bond-slip behavior of the lightweight aggregate concrete is mainly affected by the mortar strength， making the bond stress between the concrete and reinforcement bars better than that between normal weight concrete and reinforcement bars. The bond strength increases with the increase of strength of lightweight aggregate concrete and with the decrease of anchorage length. The proposed bond stress-slip constitutive model shows good precision to predict test curves.

Key words: lightweight aggregate concrete; pull-out test; bond strength; bond-slip constitutive model; thick-wall cylinder model

CLC Number:

TU375

ZHANG Yu， LIU Bo-quan， WU Tao， CHEN Xu. Bond-Slip Behavior Between Reinforcement Bars and High-Strength Lightweight Aggregate Concrete[J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 274-282.

References

[1]Baldwin J W.Bond of reinforcement in lightweight aggregate concrete［D］.Columbia:University of Missouri，1965.
[2]Hossain K M A.Bond characteristics of plain and deformed bars in lightweight pumice concrete［J］.Construction and Building Materials，2008，22(7):1491-99.
[3]ACI Committeeand IOS.Building code requirements for structural concrete and commentary:ACI 318-19 ［S］.Farmington Hills，Michigan:American Concrete Institute，2019.
[4]陈旭.纤维增韧高强轻骨料混凝土力学性能及黏结锚固性能研究［D］.西安:长安大学，2017.(Chen Xu.Experimental study on mechanical properties and bond behavior of fiber-reinforced high strength lightweight aggregate concrete［D］.Xian:Changan University，2017.)
[5]Martin H.Bond performance of ribbed bars-influence of concrete composition and consistency［C］// Proceedings of the International Conference on Bond in Concrete.Paisley，1982:289-299.
[6]Chen H J，Huang C H，Kao Z Y.Experimental investigation on steel-concrete bond in lightweight and normal weight concrete［J］.Structural Engineering and Mechanics，2004，17(2):141-152.
[7]李渝军，叶列平，程志军，等.高强陶粒混凝土与变形钢筋黏结锚固强度的试验研究［J］.建筑科学，2006，22(4):51-55.(Li Yu-jun，Ye Lie-ping，Cheng Zhi-jun，et al.Bond strength between high-strength lightweight aggregate concrete and deformed bar［J］.Building Science，2006，22(4):51-55.)
[8]Lo T Y，Cui H Z.Effect of porous lightweight aggregate on strength of concrete［J］.Materials Letters，2004，58(6):916-919.
[9]陆春阳，王卫玉，李丕宁.陶粒混凝土与变形钢筋黏结锚固性能的试验研究［J］.广西大学学报(自然科学版)，2007，32(1):6-9.(Lu Chun-yang，Wang Wei-yu，Li Pi-ning.Experiment research on bond behavior between deformed bar and lightweight concrete［J］.Journal of Guangxi University(Natural Science Edition)，2007，32(1):6-9.)
[10]CEB-FIP.Structural concrete—textbook on behavior，design and performance，updated knowledge of the CEB-FIP model code 1990［S］.Stuttgart:Sprint-Druck，1999.
[11]International Federation for Structural Concrete.MC2010 bulletin 55:model code for concrete structures 2010［S］.Lausanne:International Federation for Structural Concrete，2010.
[12]中国建筑科学研究院.混凝土结构设计规范:GB50010—2010［S］.修订版.北京:中国建筑工业出版社，2015.(China Academy of Building Research.Code for design of concrete structures:GB50010—2010 ［S］.Rev.ed.Beijing: China Architecture & Building Press，2015.)
[13]徐有邻.钢筋混凝土黏结滑移本构关系的简化模型［J］.工程力学，1997(sup):34-38.(Xu You-lin.Simplified model of bond-slip constitutive relationship of reinforced concrete［J］.Engineering Mechanics，1997(sup):34-38.)
[14]Harajli M H.Bond stress-slip model for steel bars in unconfined or steel FRC or FRP confined concrete［J］.Engineering Structures，2009，135(5):509-518.
[15]中国建筑科学研究院.混凝土结构试验方法标准:GB50152—1992 ［S］.北京:中国建筑工业出版社，1992.(China Academy of Building Research.Standard for test method of concrete structure:GB50152—1992 ［S］.Beijing:China Architecture & Building Press，1992.)
[16]中国建筑科学研究院.混凝土结构试验方法标准:GB50152—2012 ［S］.北京:中国建筑工业出版社，2012.(China Academy of Building Research.Standard for test method of concrete structure:GB50152—2012 ［S］.Beijing: China Architecture & Building Press，2012.)
[17]徐有邻，邵卓民，沈文都.钢筋与混凝土的黏结锚固强度［J］.建筑科学，1988，4(4):8-14.(Xu You-lin，Shao Zhuo-min，Shen Wen-du.Bond strength between reinforcing bars and concrete［J］.Building Science，1988，4(4):8-14.)
[18]王卫玉.陶粒混凝土与钢筋黏结锚固性能的试验研究［D］.南宁:广西大学，2005.(Wang Wei-yu.Tests and research on bond behavior between deformed bar and lightweight concrete［D］.Nanning:Guangxi University，2005.)
[19]Hillerborg A，Modeer M，Petersson P E.Analysis of crack formation and crack growth in concrete by means of fracture mechanics and finite elements［J］.Cement and Concrete Research，1976，6(6):773-781.
[20]Petersson P E.Crack growth and development of fracture zones in plain concrete and similar materials［D］.Lund，Sweden:Lund Institute of Technology，1981.
[21]Thanyawat P，Panedpojaman P.Modeling of bonding between steel rebar and concrete at elevated temperatures［J］.Construction and Building Materials，2012，27(1):130-140.
[22]Thanyawat P，Panedpojaman P.Modeling of mechanical bond-slip for steel-reinforced concrete under thermal loads［J］.Engineering Structures，2013，48:497-507.
[23]Gao X L，Li N K，Ren X D.Analytic solution for the bond stress-slip relationship between rebar and concrete［J］.Construction and Building Materials，2019，197:385-397.
[24]Timoshenko S P，Goodier J N.Theory of elasticity［M］.3rd ed.New York:McGraw-Hill，1970.
[25]Carreira D J，Chu K H.Stress-strain relationship for plain concrete in compression［J］.Journal of the American Concrete Institute，1985，82(6):797-804.