Direct Shear Strength of UHPC Large-Keyed Epoxy Joint: Theoretical Model and Experimental Verification
Publication: Journal of Bridge Engineering
Volume 27, Issue 9
Abstract
With the development trend of accelerated bridge construction, the precast ultra-high-performance concrete (UHPC) segmental bridge might be increasingly used due to the advantages of lightweight superstructure and advanced structural performance. However, there is still lack of study on the UHPC keyed epoxy joint, especially in terms of theoretical aspects. In this study, a theoretical model was developed to predict the shear capacity of UHPC large-keyed epoxy joints. In the proposed model, the shear capacity of joint was determined as the superposition of the shear contributions of the flat part and the keyed part. For the flat part, the shear strength mainly depends on the bond shear performance at the joint interface, which could be determined though test results of flat epoxy joints. To obtain the shear strength of the keyed part, the failure envelopes for UHPC were determined based on Mohr–Coulomb shear failure criterion, and the theory of Mohr’s circle was adopted. Then, the direct shear test was performed on 15 UHPC large-keyed epoxy joint specimens and four flat epoxy joint specimens to obtain their failure modes and shear resistance for verification. In addition to the test data in this study, test results of related existing studies were also utilized to validate the proposed theoretical model. Furthermore, the AASHTO equation and the existing formulas for epoxy joint were also used for comparison. Results indicated that the proposed model performed well in both the accuracy and the variation degree.
Practical Applications
With the development trend of accelerated bridge construction (ABC), the precast ultra-high-performance concrete (UHPC) segmental bridge might be increasingly used due to the advantages of lightweight superstructure and advanced structural performance. The shear performance of joint between precast segments is of great importance since fibers and reinforcements are discontinuous at the joint. This paper presents a theoretical model for predicting the shear capacity of UHPC large-keyed epoxy joints in precast UHPC segmental bridges. In this model, the shear capacity of UHPC large-keyed epoxy joints is assumed to be contributed by the flat part and the keyed part, and the shear strength of the keyed part is determined based on Mohr–Coulomb shear failure criterion and the theory of Mohr’s circle. This theoretical model has been validated by the test data of UHPC keyed epoxy joint specimens obtained from this study and other existing studies, indicating that it performs well in both accuracy and variation degree. It should be noted that this model is limited to the UHPC large-keyed or single-keyed epoxy joint while it is not applicable to the multikeyed joint. This study will contribute to establish the equation for determining the shear capacity of UHPC precast segmental bridges in the design.
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Acknowledgments
This study was supported by Youth Program of National Natural Science Foundation of China (Grant No. 51808055), Outstanding Youth Project of Hunan Provincial Department of Education (Grant No. 18B131), Open Fund Project of Bridge Engineering in Changsha University of Science and Technology (Grant No. 18KB03) and Natural Science Foundation of Hunan Province of China (Grant No. 2022JJ40488). The financial support is greatly appreciated.
References
AASHTO. 2003. Interim revisions to the guide specifications for the design and construction of segmental concrete bridges, second edition (1999). Washington, DC: AASHTO.
ACI (American Concrete Institute). 2002. Building code requirements for structural concrete (ACI 318-02) and commentary (318R-02). ACI Committee 318. Farmington Hills, MI: ACI.
Ahmed, G. H., and O. Q. Aziz. 2019. “Shear behavior of dry and epoxied joints in precast concrete segmental box girder bridges under direct shear loading.” Eng. Struct. 182 (3): 89–100. https://doi.org/10.1016/j.engstruct.2018.12.070.
Alcalde, M., H. Cifuentes, and F. Medina. 2012. “Shear strength of dry keyed joints and comparison with different formulations.” In Proc., 8th Int. Conf. on Fracture Mechanics of Concrete and Concrete Structures. Toledo, Spain: International Association of Fracture Mechanics for Concrete and Concrete Structures.
Alcalde, M., H. Cifuentes, and F. Medina. 2013. “Influence of the number of keys on the shear strength of post-tensioned dry joints.” Mater. Constr. 63 (310): 297–307.
ASTM. 2005. Bond strength of epoxy-resin systems used with concrete by slant shear. ASTM C882/C882M-05. West Conshohocken, PA: ASTM.
ATEP (Asociación Tecnica Española de Pretensado). 1996. Design and construction of bridges and structures with external prestressing. Madrid, Spain: Spanish Standard Colegio de Ingenieros de Caminos.
Benjamin, G., et al. 2020. “International perspective on UHPC in bridge engineering.” J. Bridge Eng. 25 (11): 04020094. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001630.
Bu, Z. Y., and W. Y. Wu. 2018. “Inter shear transfer of unbonded prestressing precast segmental bridge column dry joints.” Eng. Struct. 154 (1): 52–65. https://doi.org/10.1016/j.engstruct.2017.10.048.
Buyukozturk, O., M. M. Bakhoum, and S. M. Beattie. 1990. “Shear behavior of joints in precast concrete segmental bridges.” J. Struct. Eng. 116 (12): 3380–3401. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:12(3380).
Chen, B. C., J. I. T, Q. W. Huang, H. Z. Wu, Q. j. Ding, and Y. W. Chen. 2014. “Review of research on ultra-high performance concrete.” [In Chinese.] J. Archit. Civ. Eng. 31 (3): 1–24.
Gopal, B. A., F. Hejazi, M. Hafezolghorani, and Y. L. Voo. 2020. “Shear strength of dry and epoxy joints for ultra-high-performance fiber-reinforced concrete.” ACI Struct. J. 117 (1): 279–288.
Haber, Z. B., J. F. Munoz, I. De la Varga, and B. A. Graybeal. 2018. “Bond characterization of uhpc overlays for concrete bridge decks: Laboratory and field testing.” Constr. Build. Mater. 190 (9): 1056–1068. https://doi.org/10.1016/j.conbuildmat.2018.09.167.
He, S., Q. Li, G. Yang, X. Zhou, and S. M. Ayman. 2022. “Experimental study on flexural performance of HSS-UHPC composite beams with perfobond strip connectors.” J. Struct. Eng. 148 (6): 04022064. https://doi.org/10.1061/(ASCE)ST.1943-541X.0003366.
Jiang, H., R. Wei, Z. J. Ma, Y. Li, and Y. Jing. 2016. “Shear strength of steel fiber-reinforced concrete dry joints in precast segmental bridges.” J. Bridge Eng. 21 (11): 04016085. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000968.
Kay, W., and B. C. Christopher. 2015. “Material efficiency in the design of ultra-high performance concrete.” Constr. Build. Mater. 86 (6): 33–43. https://doi.org/10.1016/j.conbuildmat.2015.03.087.
Lee, C. H., Y. J. Kim, W. J. Chin, and E. S. Choi. 2012. “Shear strength of ultra high performance fiber reinforced concrete (UHPFRC) precast bridge joint.” In Vol. 2 of High performance fiber reinforced cement composites, edited by G. J. Parra-Montesinos, H. W. Reinhardt, and A. E. Naaman, 413–420. Dordrecht, Netherlands: Springer.
Li, G., D. Yang, and Y. Lei. 2013. “Combined shear and bending behavior of joints in precast concrete segmental beams with external tendons.” J. Bridge Eng. 18 (10): 1042–1052. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000453.
Liu, J., F. Han, G. Cui, Q. Zhang, J. Lv, L. Zhang, and Z. Yang. 2016. “Combined effect of coarse aggregate and fiber on tensile behavior of ultra-high performance concrete.” Constr. Build. Mater. 121 (6): 310–318. https://doi.org/10.1016/j.conbuildmat.2016.05.039.
Liu, T., Z. Wang, J. Guo, and J. Wang. 2019. “Shear strength of dry joints in precast UHPC segmental bridges: Experimental and theoretical research.” J. Bridge Eng. 24 (1): 04018100. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001323.
Roberts, C. L., J. E. Breen, and M. E. Kreger. 1993. Measurement based revisions for segmental bridge design criteria. Rep. No. 1234-3F. Austin, TX: Center for Transportation Research, Univ. of Texas atAustin.
Rombach, G. 2002. “Precast segmental box girder bridges with external prestressing-design and construction.” Segmental Bridges 19 (2): 1–15.
Shamass, R., X. Zhou, and Z. Wu. 2017. “Numerical analysis of shear-off failure of keyed epoxied joints in precast concrete segmental bridges.” J. Bridge Eng. 22 (1): 04016108. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000971.
Shao, X., R. Pan, H. Zhan, W. Fan, Z. Yang, and L. Wei. 2017. “Experimental verification of the feasibility of a novel prestressed reactive powder concrete box-girder bridge structure.” J. Bridge Eng. 22 (6): 04017015. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001033.
SIA (Swiss Society of Engineers and Architects). 2016. Ultra-high performance fiber reinforced concrete (UHPFRC)-materials. Design and Execution. Final draft. [In German and French]. Zurich, Switzerland: SIA.
Song, S. T. 2015. Experimental study and theoretical analysis in bending and joint shear of high-speed railway precast concrete box bridges, 10–20. [In Chinese.] Nanjing, China: College of Civil Engineering, Southeast China Univ.
Turmo, J., G. Ramos, and J. A. Aparicio. 2006. “Shear strength of match cast dry joints of precast concrete segmental bridges: Proposal for Eurocode 2.” Mater. Constr. 56 (282): 45–52. https://doi.org/10.3989/mc.2006.v56.i282.26.
Voo, Y. L., P. C. Augustin, and T. A. J. Thomas. 2011. “Construction and design of a 50 m single span UHP ductile concrete composite road bridge.” Eng. Struct. 89 (10): 24–31.
Voo, Y. L., S. J. Foster, and C. C. Voo. 2015. “Ultrahigh-performance concrete segmental bridge technology: Toward sustainable bridge construction.” J. Bridge Eng. 20 (8): B5014001. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000704.
Wang, J., J. Liu, Z. Wang, T. Liu, J. Z. Liu, and J. Zhang. 2021. “Cost-effective UHPC for accelerated bridge construction: Material properties, structural elements, and structural applications.” J. Bridge Eng. 26 (2): 04020117. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001660.
Yoo, D. Y., and B. Nemkumar. 2016. “Mechanical properties of ultra-high-performance fiber-reinforced concrete: A review.” Cem. Concr. Compos. 73 (10): 267–280. https://doi.org/10.1016/j.cemconcomp.2016.08.001.
Yu, M. H. 2002. “Advances in strength theories for materials under complex stress state in the 20th century.” Appl. Mech. Rev. 55 (3): 10–15. https://doi.org/10.1115/1.1472455.
Yuan, A., X. Zhao, and R. Lu. 2020. “Experimental investigation on shear performance of fiber-reinforced high-strength concrete dry joints.” Eng. Struct. 223 (223): 111159. https://doi.org/10.1016/j.engstruct.2020.111159.
Zhou, M., W. Lu, J. Song, and G. C. Lee. 2018. “Application of ultra-high performance concrete in bridge engineering.” Constr. Build. Mater. 186 (8): 1256–1267. https://doi.org/10.1016/j.conbuildmat.2018.08.036.
Zhou, X., N. Mickleborough, and Z. Li. 2006. “Shear strength of joints in precast concrete segmental bridges.” ACI Struct. J. 102 (1): 3–11.
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Published In
Journal of Bridge Engineering
Volume 27 • Issue 9 • September 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Dec 29, 2021
Accepted: May 27, 2022
Published online: Jul 15, 2022
Published in print: Sep 1, 2022
Discussion open until: Dec 15, 2022
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