Structural Engineering and Mechanics

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Full-scale testing on the flexural behavior of an innovative dovetail UHPC joint of composite bridges

  • Qi, Jianan (Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, School of Civil Engineering, Southeast University) ;
  • Cheng, Zhao (Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, School of Civil Engineering, Southeast University) ;
  • Wang, Jingquan (Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, School of Civil Engineering, Southeast University) ;
  • Zhu, Yutong (Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, School of Civil Engineering, Southeast University) ;
  • Li, Wenchao (Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, School of Civil Engineering, Southeast University)
  • Received : 2019.06.04
  • Accepted : 2020.02.10
  • Published : 2020.07.10
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Abstract

This paper presents a full-scale experimental test to investigate the flexural behavior of an innovative dovetail ultra-high performance concrete (UHPC) joint designed for the 5th Nanjing Yangtze River Bridge. The test specimen had a dimension of 3600 × 1600 × 170 mm, in accordance with the real bridge. The failure mode, crack pattern and structural response were presented. The ductility and stiffness degradation of the tested specimens were explicitly discussed. Test results indicated that different from conventional reinforced concrete slabs, well-distributed cracks with small spacing were observed for UHPC joint slabs at failure. The average nominal flexural cracking strength of the test specimens was 7.7 MPa, signifying good crack resistance of the proposed dovetail UHPC joint. It is recommended that high grade reinforcement be cooperatively used to take full advantage of the superior mechanical property of UHPC. A new ductility index, expressed by dividing the ultimate deflection by flexural cracking deflection, was introduced to evaluate the post-cracking ductility capacity. Finally, a strut-and-tie (STM) model was developed to predict the ultimate strength of the proposed UHPC joint.

Keywords

Acknowledgement

This study was supported by the National Natural Science Foundation of China (Grant No. 51908122, U1934205, 51678140), "Zhishan" Scholars Programs of Southeast University, the Technology R&D Project of China Communications Construction Company (grant number: 2018-ZJKJ-02) and the Fundamental Research Funds for the Central Universities (2242019K40073, 2242019R10). The financial supports are gratefully appreciated.

References

  1. ACI (American Concrete Institute) (2014), "Building code requirements for structural concrete (ACI 318-14) and commentary." ACI 318R-14, Farmington Hills, MI, USA.
  2. Arafa, A., Farghaly, A.S., Ahmed, E.A. and Benmokrane, B. (2016), "Laboratory testing of GFRP-RC panels with UHPFRC joints of the Nipigon River cable-stayed bridge in Northwest Ontario, Canada", J. Bridge Eng., 21(11), 05016006. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000943.
  3. Bandelt, M.J. and Billington, S.L. (2016), "Bond behavior of steel reinforcement in high-performance fiber-reinforced cementitious composite flexural members", Mater. Struct., 49, 71-86. https://doi.org/10.1617/s11527-014-0475-4.
  4. Collins, M.P. and Mitchell, D. (1991), "Prestressed Concrete Structures", Prentice-Hall, Englewood Cliffs, NJ, USA.
  5. De la Varga, I., Haber, Z.B. and Graybeal, B.A. (2018), "Enhancing shrinkage properties and bond performance of prefabricated bridge deck connection grouts: Material and component testing", J. Mater. Civil Eng., 30(4), 04018053. https://doi.org/10.1061/(ASCE)MT.1943-5533.0002235.
  6. Farzad, M., Shafieifar, M. and Azizinamini, A. (2019), "Experimental and numerical study on an innovative sandwich system utilizing UPFRC in bridge applications", Eng. Struct., 180, 349-356. https://doi.org/10.1016/j.engstruct.2018.11.052.
  7. GB/T 50081-2002 (2002), "Standard for test method of mechanical properties on ordinary concrete." Ministry of Construction of the People's Republic of China, Beijing.
  8. Grace, N., Ushijima, K., Baah, P. and Bebawy, M. (2012), "Flexural behavior of a carbon fiber-reinforced polymer prestressed decked bulb T-beam bridge system", J. Compos. Constr., 17(4), 497-506. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000345.
  9. Graybeal, B.A. (2008), "Flexural behavior of an ultrahighperformance concrete I-girder", J. Bridge Eng., 13(6), 602-610. https://doi.org/10.1061/(ASCE)1084-0702(2008)13:6(602).
  10. Graybeal, B.A. (2010), "Behavior of field-cast ultra-high performance concrete bridge deck connections under cyclic and static structural loading", Rep. No. FHWA-HRT-11-023, Federal Highway Administration, McLean, VA, USA.
  11. Haber, Z.B. and Graybeal, B.A. (2018), "Lap-spliced rebar connections with UHPC closures", J. Bridge Eng., 23(6), 04018028. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001239.
  12. Le Hoang, A. and Fehling, E. (2017a), "A review and analysis of circular UHPC filled steel tube columns under axial loading", Struct. Eng. Mech., 61(2), 417-430. https://doi.org/10.12989/sem.2017.62.4.417.
  13. Le Hoang, A. and Fehling, E. (2017b), "Assessment of stress-strain model for UHPC confined by steel tube stub columns", Struct. Eng. Mech., 63(3), 371-384. https://doi.org/10.12989/sem.2017.63.3.371.
  14. Lee, J.K. and Lee, S.H. (2015), "Flexural behavior of ultra-high-performance fiber-reinforced concrete moment connection for precast concrete decks", ACI Struct. J., 112(4), 451-462. https://doi.org/10.14359/51687657.
  15. Mirmiran, A. Sadaghian, H. and Pourbaba, M. (2019), "Flexural response of UHPFRC beams reinforced with steel rebars", Adv. Civil Eng. Mater., 8(3), 411-430. https://doi.org/10.1520/ACEM20190129.
  16. Nguyen, C.V., Le, A.H. and Thai, D.K. (2019), "Numerical simulation and analytical assessment of STCC columns filled with UHPC and UHPFRC", Struct. Eng. Mech., 70(1), 13-31. https://doi.org/10.12989/sem.2019.70.1.013.
  17. Parra-Montesinos, G.J. (2005), "High-performance fiber-reinforced cement composites: an alternative for seismic design of structures", ACI Struct. J., 102(5), 668-675.
  18. Pourbaba, M. Asefi, E. Sadaghian, H. and Mirmiran, A. (2018), "Effect of age on the compressive strength of ultra-high-performance fiber-reinforced concrete", Constr. Build. Mater., 175, 402-410. https://doi.org/10.1016/j.conbuildmat.2018.04.203.
  19. Pourbaba, M. Sadaghian, H. and Mirmiran, A. (2019), "A comparative study of flexural and shear behavior of ultra-high-performance fiber-reinforced concrete beams", Adv. Struct. Eng., 22(7), 1727-1738. https://doi.org/10.1177/1369433218823848.
  20. Qi, J., Ma, Z.J., Wang, J. and Liu, T. (2016), "Post-cracking shear strength and deformability of HSS-UHPFRC beams", Struct. Concr., 17(6), 1033-1046. https://doi.org/10.1002/suco.201500191.
  21. Qi, J., Bao, Y., Wang, J., Li, L., and Li, W. (2019a), "Flexural behavior of an innovative dovetail UHPC joint in composite bridges under negative bending moment", Eng. Struct., 200, 109716. https://doi.org/10.1016/j.engstruct.2019.109716.
  22. Qi, J., Ding, X., Wang, Z. and Hu, Y. (2019b), "Shear strength of fiber-reinforced HSS-UHPC beams based on refined calculation of compression zone depth considering concrete tension", Adv. Struct. Eng., 22(8), 2006-2018. https://doi.org/10.1177/1369433219829805.
  23. Qi, J., Ma, Z.J. and Wang, J. (2017), "Shear strength of UHPFRC beams: mesoscale fiber-matrix discrete model", J. Struct. Eng., 143(4), 04016209. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001701.
  24. Qi, J., Wang, J. and Feng, Y. (2019), "Shear performance of an innovative UHPFRC deck of composite bridge with coarse aggregate", Adv. Concr. Constr., 7(4): 219-229. https://doi.org/10.12989/acc.2019.7.4.219.
  25. Qi, J., Wang, J. and Ma, Z.J. (2018b), "Flexural response of high-strength steel-ultra-high-performance fiber reinforced concrete beams based on a mesoscale constitutive model: Experiment and theory", Struct. Concr., 19(3), 719-734. https://doi.org/10.1002/suco.201700043.
  26. Qi, J., Wu, Z., Ma, Z.J. and Wang, J. (2018a), "Pullout behavior of straight and hooked-end steel fibers in UHPC matrix with various embedded angles", Constr. Build. Mater., 191, 764-774. https://doi.org/10.1016/j.conbuildmat.2018.10.067.
  27. Russell, H.G. Graybeal, B.A. and Russell, H.G. (2013), "Ultra-high performance concrete: a state-of-the-art report for the bridge community (No. FHWA-HRT-13-060)", United States. Federal Highway Administration. Office of Infrastructure Research and Development.
  28. Saleem, M.A. Mirmiran, A. Xia, J. and Mackie, K. (2011), "Ultra-high-performance concrete bridge deck reinforced with high-strength steel", ACI Struct. J., 108(5), 601-609.
  29. Saleem, M.A. Mirmiran, A. Xia, J. and Mackie, K. (2012), "Development length of high-strength steel rebar in ultrahigh performance concrete", J. Mater. Civil Eng., 25(8), 991-998. https://doi.org/10.1061/(ASCE)MT.1943-5533.0000571.
  30. Schlaich, J. and Schafer, K. (1991), "Design and detailing of structural concrete using strut-and-tie models", Struct. Eng., 69(6), 113-125.
  31. Verger-Leboeuf, S., Charron, J.P. and Massicotte, B. (2017), "Design and behavior of UHPFRC field-cast transverse connections between precast bridge deck elements", J. Bridge Eng., 22(7), 04017031. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001064.
  32. Wang, J., Qi, J., Tong, T., Xu, Q. and Xiu, H. (2019), "Static behavior of large stud shear connectors in steel-UHPC composite structures", Eng. Struct., 178, 534-542. https://doi.org/10.1016/j.engstruct.2018.07.058.
  33. Yoo, D.Y. and Yoon, Y.S. (2015), "Structural performance of ultra-high-performance concrete beams with different steel fibers", Eng. Struct., 102, 409-423. https://doi.org/10.1016/j.engstruct.2015.08.029.
  34. Zhou, M. Lu, W. Song, J. and Lee, G.C. (2018), "Application of ultra-high performance concrete in bridge engineering", Constr. Build. Mater., 186, 1256-1267. https://doi.org/10.1016/j.conbuildmat.2018.08.036.

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