Scaled Model Test for Efficient Arrangement of Steel Reinforcement in Bridge Pier Caps
Publication: Journal of Bridge Engineering
Volume 27, Issue 9
Abstract
Because variations associated with the strut-and-tie model (STM) in the design of pier caps could lead to over-reinforcement of steel rebars, special attention should be paid to using STMs for reasonable rebar arrangements. Here, static loading tests were conducted on three scaled-model specimens of bridge pier caps to investigate the efficient arrangement of steel reinforcement in the bridge pier cap design. To determine the effect of the loading condition on the pier cap behavior, T-type pier caps with two or four support bearings were tested under realistic boundary conditions, using three hydraulic actuators. The tested load–resistance capacities were compared with the STM predictions. The study revealed that the arrangement of vertical ties in the STM along the shear critical section in the column’s vicinity could induce excessive vertical shear reinforcement. The experimental results showed that all specimens designed using the STM with no unnecessary vertical ties exhibited flexure failure without any sudden shear failure. The effect of load distribution on the pier cap behavior was evaluated using different numbers of support bearings.
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References
AASHTO. 2014. AASHTO LRFD bridge design specifications. Washington, DC: AASHTO.
ACI (American Concrete Institute). 2019. Building code requirements for structural concrete. ACI 318. Farmington Hills, MI: ACI.
Al-Soufi, S. 1990. “The response of reinforced concrete bridge pier caps.” Master’s thesis, Dept. of Civil Engineering and Applied Mechanics, McGill Univ.
Anderson, N. S., and J. A. Ramirez. 1989. “Detailing of stirrup reinforcement.” ACI Struct. J. 86 (5): 507–515.
Arowojolu, O., A. Ibrahim, A. Almakrab, N. Saras, and R. Nielsen. 2021. “Influence of shear span-to-effective depth ratio on behavior of high-strength reinforced concrete beams.” Int. J. Concr. Struct. Mater. 15 (3): 255–266.
Azizinamini, A., R. Pavel, E. Hatfield, and S. K. Ghosh. 1999. “Behavior of lap-spliced reinforcing bars embedded in high-strength concrete.” ACI Struct. J. 96 (5): 826–835.
CEN (European Committee for Standardization). 2004. Design of concrete structures, part 1-1: General rules and rules for buildings. Eurocode 2. Brussel, Belgium: CEN.
Chung, C. H., J. H. Lee, and S. H. Kwon. 2018. “Proposal of a new partially precast pier cap system and experimental verification of its structural performance.” KSCE J. Civ. Eng. 22 (7): 2362–2370. https://doi.org/10.1007/s12205-017-1268-4.
CSA (Canadian Standard Association). 2014. Design of concrete structures. CSA A23.3-14. Mississauga, ON, Canada: CSA.
Geevar, I., and D. Menon. 2019. “Strength of reinforced concrete pier caps-experimental validation of strut-and-tie method.” ACI Struct. J. 116 (1): 261–273. https://doi.org/10.14359/51711138.
Harris, H. G., and G. M. Sabnis. 1999. Structural modeling and experimental techniques. Boca Raton, FL: CRC Press.
Hsiumg, W., and G. C. Frantz. 1985. “Transverse stirrup spacing in R/C beams.” J. Struct. Eng. 111 (2): 353–362. https://doi.org/10.1061/(ASCE)0733-9445(1985)111:2(353).
KCI (Korea Concrete Institute). 2017. Concrete design code and commentary. Seoul: Kimoondang.
Kim, D. W., and C. S. Shim. 2015. “Evaluation of structural performance of precast modular pier Cap.” [In Korean.] J. Korea Concr. Inst. 27 (1): 55–63. https://doi.org/10.4334/JKCI.2015.27.1.055.
Kim, T. H., Y. J. Kim, J. G. Lee, and H. M. Shin. 2010b. “Precast concrete copings for precast segmental PSC bridge columns: 2. Experiments and analyses.” [In Korean] J. Korea Soc. Civ. Eng. 30 (5A): 475–484.
Kim, T. H., S. J. Park, and Y. J. Kim. 2010a. “Precast concrete copings for precast segmental PSC bridge columns: 1. Development and verification of system.” [In Korean.] J. Korea Soc. Civ. Eng. 30 (5A): 463–473.
KRA (Korean Road Association). 2016. Korean highway bridge design code (limit state design). Sejong, Republic of Korea: Ministry of Land, Infrastructure and Transport.
Lee, J. H., J. K. Son, D. H. Yoo, and S. J. Shin. 2010. “Optimum design and accelerated construction of bridge pier cap.” [In Korean.] Mag. Korea Concr. Inst. 22 (6): 71–76.
Lee, S. C., J. Y. Cho, and F. J. Vecchio. 2011. “Model for post-yield tension stiffening and rebar rupture in concrete members.” Eng. Struct. 33 (5): 1723–1733. https://doi.org/10.1016/j.engstruct.2011.02.009.
MacLeod, G. 1997. “Influence of concrete strength on the behaviour of bridge pier caps.” Master’s thesis, Dept. of Civil Engineering and Applied Mechanics, McGill Univ.
Park, B. S., S. H. Park, and J. Y. Cho. 2013. “A pre-assembly method of steel reinforcement to improve the constructability of pier coping.” Eng. Struct. 48: 166–175. https://doi.org/10.1016/j.engstruct.2012.09.015.
Park, J. H. 2020. “Strut-and-tie model for efficient design of bridge pier cap.” Ph.D. thesis, Dept. of Civil and Environmental Engineering, Seoul National Univ.
Rogowsky, D. M., J. G. MacGregor, and S. Y. Ong. 1986. “Tests of reinforced concrete deep beams.” ACI J. 83 (55): 614–623.
Schlaich, J., and K. Schafer. 1991. “Design and detailing of structural concrete using strut-and-tie models.” Struct. Eng. 69 (6): 113–125.
Schlaich, J., K. Schafer, and M. Jennewein. 1987. “Toward a consistent design of structural concrete.” PCI J. 32 (3): 74–150. https://doi.org/10.15554/pcij.05011987.74.150.
Tuchscherer, R., D. Birrcher, M. Huizinga, and O. Bayrak. 2011. “Distribution of stirrups across web of deep beams.” ACI Struct. J. 108 (6): 779–781.
Young, B. S., J. M. Bracci, P. B. Keating, and M. B. D. Hueste. 2002. “Cracking in reinforced concrete bent caps.” ACI Struct. J. 99 (4): 488–498.
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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: Oct 15, 2021
Accepted: Apr 18, 2022
Published online: Jun 22, 2022
Published in print: Sep 1, 2022
Discussion open until: Nov 22, 2022
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Cited by
- Jae-Hyun Park, Seong-Cheol Lee, Jae-Yeol Cho, Influence of Sectional Depth on Structural Behavior of Bridge Pier Caps, Journal of Bridge Engineering, 10.1061/JBENF2.BEENG-6090, 28, 7, (2023).