Time-Dependent Deformations of Eccentrically Loaded Reinforced Concrete Columns
Source abstract
Abstract
If reinforced concrete columns and walls in high-rise buildings are subjected to axial load for a sustained duration, long-term lateral deformation (or curvature) as well as axial shortening increase over time due to the creep and shrinkage of concrete. In the present study, sustained load tests were performed to evaluate the time-dependent axial shortening and lateral displacement occurring in eccentrically loaded columns. A test set-up using post-tensioning steel rods was introduced for the sustained loading with or without eccentricity. The test results showed that the lateral displacement as well as the axial shortening increased over the sustained duration but the increasing rate of the long-term deformations rapidly decreased with increasing time. The time-dependent axial shortening and lateral displacement increasing with time were predicted by using the age-adjusted effective modulus method based on the creep and shrinkage models of ACI 209. The predictions agreed well with the test results.
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Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Concrete Properties and Behavior · Seismic Performance and Analysis
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References (15)
Show source-provided references
1. ACI Committee 209. (1992). Prediction of creep, shrinkage and temperature effects in concrete structures, ACI 209R-92 (p. 47). Farmington Hills: American Concrete Institute.
2. ACI Committee 318. (2014). Building code requirements for structural concrete and commentary, ACI 318-14. Farmington Hills: American Concrete Institute.
3. Balaguru, P., & Nawy, E. G. (1982) Evaluation of creep strains and stress redistribution in RC columns. ACI Special Publication, SP76-12, pp. 309–324.
4. Bradford, M. A. (1997). Service load analysis of slender reinforced concrete columns. ACI Structural Journal, 94(6), 675–683.
5. European Committee for Standardization. (2004). Eurocode 2: Design of concrete structures—Part 1-1: General rules and rules for buildings, BS EN 1992-1-1: 2004 (p. 2004). London: British Standards Institute.
6. Fintel, M., Ghosh, S. K., & Iyengar, H. (1987). Column shortening in tall structure—prediction and compensation, EB108.01D (p. 35). Skokie: Portland Cement Association.
7. Green, R., & Breen, J. E. (1969). Eccentrically loaded concrete columns under sustained load. Proceedings of ACI Journal, 66(11), 866–874.
8. Kim, J. Y., & Abdelrazaq, A. K. (2009). Construction sequence analysis of the flat plate system in a high-rise building and its impact on the construction cycle. The Structural Design of Tall and Special Buildings, 18(3), 341–349.10.1002/tal.443 ↗
9. Korean Concrete Institute (KCI). (2012). Design code for structural concrete, KCI 2012. Seoul: Korean Concrete Institute.
10. Maru, S., Asfaw, M., Sharma, R. K., & Nagpal, A. K. (2003). Effect of creep and shrinkage on RC frames with high beam stiffness. Journal of Structural Engineering, ASCE, 129(4), 536–543.10.1061/(ASCE)0733-9445(2003)129:4(536) ↗
11. McGregor, J. G. (1997). Reinforced concrete: Mechanics and design (3rd ed., p. 938). New Jersey: Prentice Hall Inc.
12. Mickleborough, N. C., & Gilbert, R. I. (1991) Creep Buckling of uniaxially loaded reinforced concrete columns. ACI Special Publication, SP129-03, pp. 39–53.
13. Park, R., & Paulay, T. (1975). Reinforced concrete structures (p. 769). New York: Wiley.10.1002/9780470172834 ↗
14. Tatsa, E. Z. (1989). Load carrying of eccentrically loaded reinforced concrete panels under sustained load. ACI Structural Journal, 86(2), 150–155.
15. Viest, I. M., Elstner, R. C., & Hognestad, E. (1955). Sustained load strength of eccentrically loaded short reinforced concrete columns. Journal of the American Concrete Institute, 27(7), 727–755.