Abstract
Ultra-high performance fiber-reinforced concrete (UHPFRC) exhibits high compressive and tensile strength together with outstanding durability. Due to these superior properties, UHPFRC is promising for retrofitting existing reinforced concrete (RC) bridges. While research and on-site applications show the significant improvement of RC structures strengthened with UHPFRC in flexure, information regarding the shear behavior of such UHPFRC composite structures is limited. Therefore, the primary objective of the present study is to investigate the efficiency of UHPFRC in enhancing the shear strength of RC beams. The material properties including the compressive and tensile strength, and shrinkage of UHPFRC are experimentally measured. The shear deficient reference beam (RB) is designed, and UHPFRC is applied on the lateral sides of the RB. Two different bonding techniques to apply UHPFRC are employed: (1) casting fresh UHPFRC in-situ; and (2) gluing precast UHPFRC plates with epoxy resin. The interface properties under each technique are examined. Results demonstrate that compared to RB, strengthened beam (ST) with bonded prefabricated UHPFRC using epoxy resin shows an around 110% and 60% enhancement in strength and ductility, respectively. However, with in-situ casting of UHPFRC, due to restrained shrinkage, the delamination between UHPFRC and concrete beam occurs and a negligible strengthening effect is observed. The findings indicate that the ability of UHPFRC can be fully utilized only provided that the interface strength is sufficient to prevent premature debonding for the hybrid UHPFRC-concrete structure.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Hung C-C, El-Tawil S, Chao S-H (2021) A review of developments and challenges for UHPC in structural engineering: behavior, analysis, and design. J Struct Eng
Du J, Meng W, Khayat KH, et al (2021) New development of ultra-high-performance concrete (UHPC). Compos. Part B Eng
Yu R, Spiesz P, Brouwers HJH (2014) Mix design and properties assessment of Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). Cem Concr Res
Zhu Y, Zhang Y, Hussein HH, Chen G (2020) Flexural strengthening of rein-forced concrete beams or slabs using ultra-high performance concrete (UHPC): a state of the art review. Eng Struct 205:110035
Huang Y, Grünewald S, Schlangen E, Luković M (2022) Strengthening of concrete structures with ultra high performance fiber reinforced concrete (UHPFRC): a critical review. Constr Build Mater 336:127398
Sakr MA, Sleemah AA, Khalifa TM, Mansour WN (2019) Shear strengthening of reinforced concrete beams using prefabricated ultra-high performance fiber rein-forced concrete plates: experimental and numerical investigation. Struct Concr
Said A, Elsayed M, El-Azim AA, et al (2022) Using ultra-high performance fiber reinforced concrete in improvement shear strength of reinforced concrete beams. Case Stud Constr Mater
Baloch WL, Siad H, Lachemi M, Sahmaran M (2021) A review on the durability of concrete-to-concrete bond in recent rehabilitated structures. J. Build. Eng
Yuan S, Liu Z, Tong T, Fu CC (2022) Bond Behaviors between UHPC and normal-strength concrete: experimental investigation and database construction. J Mater Civ Eng 34:4021398
Zhang Y, Zhu P, Liao Z, Wang L (2020) Interfacial bond properties between nor-mal strength concrete substrate and ultra-high performance concrete as a repair material. Constr Build Mater
Feng S, Xiao H, Li H (2020) Comparative studies of the effect of ultrahigh-performance concrete and normal concrete as repair materials on interfacial bond properties and microstructure. Eng Struct
Valikhani A, Jahromi AJ, Mantawy IM, Azizinamini A (2021) Effect of mechanical connectors on interface shear strength between concrete substrates and UHPC: experimental and numerical studies and proposed design equation. Con-str Build Mater 267(1–17):7
Feng S, Xiao H, Li Y (2022) Influence of interfacial parameters and testing methods on UHPC – NSC bond strength : Slant shear vs. direct tensile testing. Cem Concr Compos 131:104568
Safdar M, Matsumoto T, Kakuma K (2016) Flexural behavior of reinforced concrete beams repaired with ultra-high performance fiber reinforced concrete (UHPFRC). Compos Struct 157:448–460
Lampropoulos AP, Paschalis SA, Tsioulou OT et al (2016) Strengthening of reinforced concrete beams using ultra high performance fibre reinforced concrete (UHPFRC). Eng Struct 106:370–384
Krahl PA, Carrazedo R, El Debs MK (2018) Mechanical damage evolution in UHPFRC: Experimental and numerical investigation. Eng Struct 170:63–77
Paegle I, Minelli F, Fischer G (2016) Cracking and load-deformation behavior of fiber reinforced concrete: influence of testing method. Cem Concr Compos 73:147–163
Kheir J, Klausen A, Hammer TA, et al (2021) Early age autogenous shrinkage cracking risk of an ultra-high performance concrete (UHPC) wall: Modelling and experimental results. Eng Fract Mech
Code P (2005) Eurocode 2: design of concrete structures-part 1–1: general rules and rules for buildings. Br. Stand. Institution, London
Du béton F (2008) Structural Connections for Precast Concrete Buildings: Guide to Good Practice. International Federation for Structural Concrete (fib)
Acknowledgement
This work was supported by the Dutch Organization for Scientific Research (NWO) under the grant “Optimization of interface behaviour for innovative hybrid concrete structures” (project number 16814). Yitao Huang would like to acknowledge the funding support from China Scholarship Council (CSC) under the grant CSC No. 201906950087.
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2023 The Author(s), under exclusive license to Springer Nature Switzerland AG
About this paper
Cite this paper
Huang, Y., Schlangen, E., Luković, M. (2023). Strengthening of Reinforced Concrete Beams with Ultra-high Performance Fiber-Reinforced Concrete in Shear. In: Ilki, A., Çavunt, D., Çavunt, Y.S. (eds) Building for the Future: Durable, Sustainable, Resilient. fib Symposium 2023. Lecture Notes in Civil Engineering, vol 350. Springer, Cham. https://doi.org/10.1007/978-3-031-32511-3_72
Download citation
DOI: https://doi.org/10.1007/978-3-031-32511-3_72
Published:
Publisher Name: Springer, Cham
Print ISBN: 978-3-031-32510-6
Online ISBN: 978-3-031-32511-3
eBook Packages: EngineeringEngineering (R0)