Behavior of Fiber Reinforced Key Joints in Precast Concrete Segmental Bridge: Experimental and Numerical Analysis
Publication: Journal of Bridge Engineering
Volume 26, Issue 8
Abstract
Fiber reinforced concrete (FRC) has been gradually applied to the construction of precast segmental bridges, but due to the discontinuity of the joint structure and the existence of keys, the stress at the joint is complex. Taking the number of keys at the joint, the presence or not of reinforcement in keys, the height to width ratio of specimens and joint angle as the design parameters, 10 pairs of specimens with 2% fiber ratio and 100.1 MPa FRC dry joint matching were tested under combined bending and shear load in this study. The crack development process, failure mode, cracking load, and ultimate load were also observed. The results show that the mechanical properties of specimens with 30° and 60° joint angle are better than that of 45° for both single-keyed and double-keyed specimens. With the increase in the number of keys and the ratio of height to width, the cracking load, ultimate load, and overall stiffness of the specimens are greatly improved. The internal reinforcement in the specimen can increase the cracking load and ultimate load, change the failure mode and increase the integrity of the specimen. The reinforcement in the key has little effect on the mechanical properties and could not change the failure mode of the specimens under combined bending and shear load. In addition, a numerical analysis model was established based on a concrete damage plasticity model in ABAQUS software to investigate structural behavior of keyed dry joints under combined bending and shear load. Fortunately, the cracking evolution history and final crack pattern presented from finite element analysis results are in good agreement with the experimental results. Moreover, the average deviation of cracking load and ultimate load is only 7.3% and 2%, respectively.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The work in this paper is supported by the National Natural Science Foundation of China (Grant No. 51878250). The authors thank Assistant Professor Lin-yun Zhou of Hunan University for his valuable comments on this article.
References
AASHTO. 2003. Guide specifications for design and construction of segmental concrete bridges: 2003 interim revisions. 2nd ed. Washington, DC: AASHTO.
AASHTO. 2013. Interim revisions to the AASHTO LRFD bridge design specification. 6th ed. Washington, DC: AASHTO.
Ahmed, G. H., and O. Q. Aziz. 2019a. “Shear behavior of dry and epoxied joints in precast concrete segmental box girder bridges under direct shear loading.” Eng. Struct. 182 (1): 89–100. https://doi.org/10.1016/j.engstruct.2018.12.070.
Ahmed, G. H., and O. Q. Aziz. 2019b. “Influence of intensity & eccentricity of posttensioning force and concrete strength on shear behavior of epoxied joints in segmental box girder bridges.” Constr. Build. Mater. 197: 117–129. https://doi.org/10.1016/j.conbuildmat.2018.11.220.
Ahmed, G. H., and O. Q. Aziz. 2019c. “Shear strength of joints in precast posttensioned segmental bridges during 1959–2019, review and analysis.” Structures 20: 527–542. https://doi.org/10.1016/j.istruc.2019.06.007.
Aparicio, A. C., G. Ramos, and J. R. Casas. 2002. “Testing of externally prestressed concrete beams.” Eng. Struct. 24 (1): 73–84. https://doi.org/10.1016/S0141-0296(01)00062-1.
Buyukozturk, O., M. M. Bakhoum, and S. Michael 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).
CNS (China National Standard). 2015. Code for design of concrete structures. GB50010-2010. 2015 ed. [In Chinese.] Beijing: China Academy of Building Sciences.
Han, R., B. Zhao S, and L. Qu F. 2006. “Experimental study on the tensile performance of steel fiber reinforced concrete.” China Civ. Eng. J. 53 (11): 67–71.
Hognestad, E., N. W. Hanson, and D. McHenry. 1955. “Concrete stress distribution in ultimate strength design.” J. Proc. 52 (12): 455–480.
Iravani, S. 1996. “Mechanical properties of high-performance concrete.” ACI Mater. J. 93 (5): 416–426.
Issa, M. A., and H. A. Abdalla. 2007. “Structural behavior of single key joints in precast concrete segmental bridges.” J. Bridge Eng. 12 (3): 315–324. https://doi.org/10.1061/(ASCE)1084-0702(2007)12:3(315).
Jiang, H., L. Chen, Z. J. Ma, and W. Feng. 2015. “Shear behavior of dry joints with castellated keys in precast concrete segmental bridges.” J. Bridge Eng. 20 (2): 04014062. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000649.
Jiang, H., Y. Li, A. Liu, Z. J. Ma, L. Chen, and Y. Chen. 2018a. “Shear behavior of precast concrete segmental beams with external tendons.” J. Bridge Eng. 23 (8): 04018049. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001249.
Jiang, H., S. Wang, Z. Fang, G. Chen, and J. Li. 2019. “Numerical analysis on the shear behavior of single-keyed dry joints in precast high-strength concrete segmental bridges.” Math. Biosci. Eng. 16 (4): 3144–3168. https://doi.org/10.3934/mbe.2019156.
Jiang, H., T. Wang, J. Xiao, D. Zhang, and S. Cai. 2018b. “Test on shear behavior of dry joints in precast steel fiber reinforced concrete segmental bridges.” [In Chinese.] China J. Highway Transp. 31 (12): 37–49.
Kent, D. C., and R. Park. 1971. “Flexural members with confined concrete.” J. Struct. Div. 97 (7): 1969–1990. https://doi.org/10.1061/JSDEAG.0002957.
Kim, H. S., W. J. Chin, J. R. Cho, Y. J. Kim, and H. Yoon. 2015. “An experimental study on the behavior of shear keys according to the curing time of UHPC.” Engineering 7 (4): 212–218. https://doi.org/10.4236/eng.2015.74017.
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 6. RILEM bookseries, 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, 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.
Saibabu, S., V. Srinivas, S. Saptarshi, N. Lakshmanan, and R. N. Iyer. 2013. “Performance evaluation of dry and epoxy jointed segmental prestressed box girders under monotonic and cyclic loading.” Constr. Build. Mater. 38: 931–940. https://doi.org/10.1016/j.conbuildmat.2012.09.068.
Shamass, R., X. Zhou, and G. Alfano. 2015. “Finite-element analysis of shear-off failure of keyed dry joints in precast concrete segmental bridges.” J. Bridge Eng. 20 (6): 04014084. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000669.
Turmo, J., G. Ramos, and A. C. Aparicio. 2006a. “Shear strength of dry joints of concrete panels with and without steel fibres.” Eng. Struct. 28 (1): 23–33. https://doi.org/10.1016/j.engstruct.2005.07.001.
Turmo, J., G. Ramos, and A. C. Aparicio. 2006b. “FEM study on the structural behaviour of segmental concrete bridges with unbonded prestressing and dry joints: Simply supported bridges.” Eng. Struct. 27 (11): 1652–1661. https://doi.org/10.1016/j.engstruct.2005.04.011.
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.
Yuan, A., H. Dai, D. Sun, and J. Cai. 2013. “Behaviors of segmental concrete box beams with internal tendons and external tendons under bending.” Eng. Struct. 48: 623–634. https://doi.org/10.1016/j.engstruct.2012.09.005.
Yuan, A., C. Yang, J. Wang, L. Chen, and R. Lu. 2019. “Shear behavior of epoxy resin joints in precast concrete segmental bridges.” J. Bridge Eng. 24 (4): 04019009. https://doi.org/10.1061/(ASCE)BE.1943-5592.0001362.
Zhou, X., N. Mickleborough, and Z. Li. 2005. “Shear strength of joints in precast concrete segmental bridges.” ACI Struct. J. 102 (1): 3–11. https://doi.org/10.14359/13525.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 26 • Issue 8 • August 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jul 22, 2020
Accepted: Jan 14, 2021
Published online: Jun 3, 2021
Published in print: Aug 1, 2021
Discussion open until: Nov 3, 2021
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.
Cited by
- R. Elhadary, M. T. Bassuoni, Bonding Evaluation of Nanosilica-Modified Slag-Based Composites Comprising of Basalt Pellets and Polyvinyl Alcohol Fibers for Shear Joints, Journal of Materials in Civil Engineering, 10.1061/JMCEE7.MTENG-16162, 36, 2, (2024).