Structural Engineering and Mechanics

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Flexural behavior of ultra high performance concrete beams reinforced with high strength steel

  • Wang, Jun-Yan (Key Laboratory of Advanced Civil Engineering Materials, Tongji University, Ministry of Education, Tongji University) ;
  • Gu, Jin-Ben (Key Laboratory of Advanced Civil Engineering Materials, Tongji University, Ministry of Education, Tongji University) ;
  • Liu, Chao (College of Civil Engineering, Tongji University) ;
  • Huang, Yu-Hao (College of Civil Engineering, Tongji University) ;
  • Xiao, Ru-Cheng (College of Civil Engineering, Tongji University) ;
  • Ma, Biao (Shanghai Municipal Engineering Design Institute (Group) Co., Ltd.)
  • Received : 2020.04.06
  • Accepted : 2021.12.02
  • Published : 2022.03.10
⟨ Previous Next ⟩

Abstract

A detailed experimental program was conducted to investigate the flexural behavior of ultra high performance concrete (UHPC) beams reinforced with high strength steel (HSS) rebars with a specified yield strength of 600 MPa via direct tensile test and monotonic four-point bending test. First, two sets of direct tensile test specimens, with the same reinforcement ratio but different yield strength of reinforcement, were fabricated and tested. Subsequently, six simply supported beams, including two plain UHPC beams and four reinforced UHPC beams, were prepared and tested under four-point bending load. The results showed that the balanced-reinforced UHPC beams reinforced with HSS rebars could improve the ultimate load-bearing capacity, deformation capacity, ductility properties, etc. more effectively owing to interaction between high strength of HSS rebar and strain-hardening characteristic of UHPC. In addition, the UHPC with steel rebars kept strain compatibility prior to the yielding of the steel rebar, further satisfied the plane-section assumption. Most importantly, the crack pattern of the UHPC beam reinforced with HSS rebars was prone to transform from single main crack failure corresponding to the normal-strength steel, to multiple main cracks failure under the condition of balanced-reinforced failure, which validated by the conclusion of direct tensile tests cooperated with acoustic emission (AE) source locating technique as well.

Keywords

Acknowledgement

The research described in this paper was financially supported by the Science and Technology Department of Zhejiang Province [grant number 2019-GXKY-01]. The financial supports are greatly appreciated.

References

  1. Alkaysi, M. and El-Tawil, S. (2016), "Effects of variations in the mix constituents of Ultra High Performance Concrete (UHPC) on cost and performance", Mater. Struct., 49(10), 4185-4200. https://doi.org/10.1617/s11527-015-0780-6.
  2. ASTM E976-99 (2000), Standard Guide for Determining the Reproducibility of Acoustic Emission Sensor Response, ASTM International, West Conshohocken, PA.
  3. Bae, Y. and Pyo, S. (2020a), "Effect of steel fiber content on structural and electrical properties of Ultra High Performance Concrete (UHPC) sleepers", Eng. Struct., 222, 111131. https://doi.org/10.1016/j.engstruct.2020.111131.
  4. Bae, Y. and Pyo, S. (2020b), "Ultra High Performance Concrete (UHPC) sleeper: Structural design and performance", Eng. Struct., 210, 110374. https://doi.org/10.1016/j.engstruct.2020.110374.
  5. Choi, W., Choi, Y. and Yoo, S.W. (2018), "Flexural design and analysis of composite beams with inverted-T steel girder with ultrahigh performance concrete slab", Adv. Civil Eng., 2018, Article ID 1356027. https://doi.org/10.1155/2018/1356027.
  6. Elmorsy, M. and Hassan, W.M. (2021), "Seismic behavior of ultrahigh performance concrete elements: state-of-the-art review and test database and trends", J. Build. Eng., 40(12), 102572. https://doi.org/10.1016/j.jobe.2021.102572.
  7. Graybeal, B.A. (2006), "Material property characterization of Ultra-High Performance Concrete", Report No. FHWA-HRT-06-103, Federal Highway Administration, Washington, D.C.
  8. Graybeal, B.A. (2008), "Flexural behavior of an ultrahigh-performance concrete I-Girder", J. Bridge Eng., 13(6), 602-610. https://doi.org/10.1061/(asce)1084-0702(2008)13:6(602).
  9. Graybeal, B.A. and Tanesi, J. (2007), "Durability of an ultrahigh-performance concrete", J. Mater. Civil Eng., 19(10), 848-854. https://doi.org/10.1061/(asce)0899-1561(2007)19:10(848).
  10. Habel, K., Denarie, E. and Bruhwiler, E. (2006), "Time dependent behavior of elements combining Ultra-High Performance Fiber Reinforced Concretes (UHPFRC) and reinforced concrete", Mater. Struct., 39(5), 557-569. https://doi.org/10.1007/s11527-005-9045-0.
  11. Hung, C.C. and Chueh, C.Y. (2016), "Cyclic behavior of UHPFRC flexural members reinforced with high-strength steel rebar", Eng. Struct., 122, 108-120. https://doi.org/10.1016/j.engstruct.2016.05.008.
  12. Hung, C.C., El-Tawil, S. and Chao, S.H. (2021), "A review of developments and challenges for UHPC in structural engineering: behavior, analysis, and design", J. Struct. Eng., 147(9), 03121001. https://doi.org/10.1061/(ASCE)ST.1943-541X.0003073.
  13. Hung, C.C., Lee, H.S. and Chan, S.N. (2019), "Tension-stiffening effect in steel-reinforced UHPC composites: Constitutive model and effects of steel fibers, loading patterns, and rebar sizes", Compos. Part B-Eng., 158, 269-278. https://doi.org/10.1016/j.compositesb.2018.09.091.
  14. Hung, C.C., Li, H. and Chen, H.C. (2017), "High-strength steel reinforced squat UHPFRC shear walls: Cyclic behavior and design implications", Eng. Struct., 141, 59-74. https://doi.org/10.1016/j.engstruct.2017.02.068.
  15. Park, J.J., Yoo, D.Y., Kim, S.W. and Yoon, Y.S. (2014), "Autogenous shrinkage of ultra high performance concrete considering early age coefficient of thermal expansion", Struct. Eng. Mech., 49(6), 763-773. https://doi.org/10.12989/sem.2014.49.6.763.
  16. Pyo, S., Kim, H.K. and Lee, B.Y. (2017), "Effects of coarser fine aggregate on tensile properties of Ultra High Performance Concrete", Cement Concrete Compos., 84, 28-35. https://doi.org/10.1016/j.cemconcomp.2017.08.014.
  17. Qi, J.N., Wang, J.Q. and Ma, Z.J. (2017), "Flexural response of high-strength steel-ultra-high-performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory", Struct. Concrete, 19(3), 719-734. https://doi.org/10.1002/suco.201700043.
  18. Ramezanpour, M., Morshed, R. and Eslami, A. (2018), "Experimental investigation on optimal shear strengthening of RC beams using NSM GFRP bars", Struct. Eng. Mech., 67(1), 45-52. https://doi.org/10.12989/sem.2018.67.1.045.
  19. Shao, Y. and Billington, S.L. (2021), "Impact of cyclic loading on longitudinally-reinforced UHPC flexural members with different fiber volumes and reinforcing ratios", Eng. Struct., 241, 112454. https://doi.org/10.1016/j.engstruct.2021.112454.
  20. Shao, Y., Hung, C.C. and Billington, S.L. (2021), "Gradual crushing of steel reinforced HPFRCC beams: Experiments and simulations", J. Struct. Eng., 147(8), 04021114. https://doi.org/10.1061/(ASCE)ST.1943-541X.0003080.
  21. Standardization Administration of the People's Republic of China (SAC) (2015), GB/T 31387-2015 Reactive Power Concrete, Standards Press of China, Beijing.
  22. Wang, J.Y. and Guo, J.Y. (2018), "Damage investigation of Ultra High Performance Concrete under direct tensile test using acoustic emission techniques", Cement Concrete Compos., 88, 17-28. https://doi.org/10.1016/j.cemconcomp.2018.01.007.
  23. Yang, I.H., Joh, C. and Kim, B.S. (2010), "Structural behavior of Ultra High Performance Concrete beams subjected to bending", Eng. Struct., 32(11), 3478-3487. https://doi.org/10.1016/j.engstruct.2010.07.017.
  24. Yang, I.H., Joh, C. and Kim, B.S. (2011), "Flexural strength of ultra high strength concrete beams reinforced with steel Fibers", Proc. Eng., 14(2), 793-796. https://doi.org/10.1016/j.proeng.2011.07.100.
  25. Yoo, D.Y. and Yoon, Y.S. (2015), "Structural performance of ultrahigh-performance concrete beams with different steel fibers", Eng. Struct., 102, 409-423. https://doi.org/10.1016/j.engstruct.2015.08.029.
  26. Yoo, D.Y., Banthia, N., Kim, S.W. and Yoon, Y.S. (2016), "Response of ultra-high-performance fiber-reinforced concrete beams with continuous steel reinforcement subjected to low-velocity impact loading", Compos. Struct., 126, 233-245. https://doi.org/10.1016/j.compstruct.2015.02.058.
  27. Yoo, D.Y., Kwon, K.Y., Yang, J.M. and Yoon, Y.S. (2017), "Effect of cover depth and rebar diameter on shrinkage behavior of ultra-high-performance fiber- reinforced concrete slabs", Struct. Eng. Mech., 61(6), 711-719. https://doi.org/10.12989/sem.2017.61.6.711.
  28. Yu, R., Spiesz, P. and Brouwers, H.J.H. (2015), "Development of an eco-friendly Ultra-High Performance Concrete (UHPC) with efficient cement and mineral admixtures uses", Cement Concrete Compos., 55(1), 383-394. https://doi.org/10.1016/j.cemconcomp.2014.09.024.
  29. Zhang, Z., Shao, X.D. and Zhu, P. (2020), "Direct tensile behaviors of steel-bar reinforced ultra-high performance fiber reinforced concrete: effects of steel fibers and steel rebars", Constr. Build. Mater., 243, 118054. https://doi.org/10.1016/j.conbuildmat.2020.118054.