Experimental Seismic Structural Performance Evaluations of RC Columns Strengthened by Stiff-Type Polyurea
Source abstract
Abstract
Abstract Recently, strong earthquakes are continuously occurring all over the world regarding, repair and strengthening of non-seismically designed structures. Presently, fiber-reinforced polymer (FRP) surface-bonding method is used as a quick and easy way to retrofit and strengthen damaged columns and walls. However, the inherent problems of the FRP surface-bonding method of bond degradation are adhesive interfaces and FRP sheet aging during service-life still. In order to overcome these problems, it is necessary to develop new materials and techniques that can induce monolithic behavior between the structural member and retrofit material by eliminating the bonding interface. One solution is to use repair and strengthening using stiff-type polyurea (STPU) developed as a seismic retrofitting material which can be applied by spraying method. In order to investigate the retrofitting effect of STPU, pseudo-dynamic push–pull test and dynamic shaking table tests are performed. The novelty of the study is that the RC columns strengthened with a newly developed STPU are tested for pseudo-dynamic (i.e., also represents the static behavior) and dynamic behavior. From the test results, overall strengthening effect of the STPU for both static and dynamic loading conditions can be understood, which can be used for retrofitting of concrete structures all over the world. The study results are discussed in detail in the paper.
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Research context
OpenAlex topics: Structural Behavior of Reinforced Concrete · Concrete Corrosion and Durability · Structural Response to Dynamic Loads
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (24)
Show source-provided references
1. Almusallam, T., Al-Salloum, Y., Elsanadedy, H., Alshenawy, A., & Iqbal, R. (2018). Behavior of FRP-strengthened RC beams with large rectangular web openings in flexure zones: Experimental and numerical study. International Journal of Concrete Structures and Materials, 12(5), 739–766.
2. Ang, B. G., Priestley, M. J. N., & Paulay, T. (1989). Seismic shear strength of circular reinforced concrete columns. ACI Structural Journal, 86(1), 45–59.
3. Bonacci, J. F., & Maalej, M. (2001). Behavioral trends of RC beams strengthened with externally bonded FRP. Journal of Composites for Construction, 5(2), 102–113.10.1061/(ASCE)1090-0268(2001)5:2(102) ↗
4. Chen, C. H., Lai, W. C., Cordova, P., Deierlein, G. G. & Tsai, K. C. (2003). Pseudo-dynamic test of full-scale RCS frame: Part 1-Design, construction and testing, In Proceedings of International Workshop on Steel and Concrete Composite Constructions (pp. 107–118).10.1061/40700(2004)128 ↗
5. Chen, Z. F., Wan, L. L., Lee, S., Ng, M., Tang, J. M., Liu, M., & Lee, L. (2008). Evaluation of CFRP, GFRP and BFRP material systems for the strengthening of RC slabs. Journal of Reinforced Plastics and Composites, 27(12), 1233–1243.10.1177/0731684407084122 ↗
6. Chung, L., Hur, M. W., & Park, T. W. (2018). Performance evaluation of CFRP reinforced concrete members utilizing fuzzy technique. International Journal of Concrete Structures and Materials, 13(2), 183–193.
7. Chung, Y. S., Park, J. H., Park, H. S., & Cho, C. B. (2002). Pseudo dynamic test for the seismic performance enhancement of circular RC Bridge Piers retrofitted with fibers. Journal of the Korea Concrete Institute, 14(2), 180–189. In Korea.10.4334/JKCI.2002.14.2.180 ↗
8. Huang, W. B., Xiang, J. Y., Lv, P., & Li, X. M. (2012). Study on mechanical properties aging of spray pure polyurea for hydraulic concrete protection. Advanced Materials Research, 374, 1325–1329.
9. Jin, D. H. (2016). Seismic performance evaluation of concrete structure using hybrid test system, Master degree thesis, Myungji University. (In Korea).
10. Jung, R. Y., & Benson, S. P. (2006). Performance evaluation of a real-time pseudo-dynamic test system. Earthquake Engineering and Structural Dynamics, 35(7), 789–810.10.1002/eqe.547 ↗
11. Kim, D. K., Kim, D. Y., Ahn, J. H., & Park, C. L. (1997). Assessment of the seismic capacity of structure using pseudo dynamic test. Journal of the Earthquake Engineering Society of Korea, 1(2), 49–57. In Korea.10.5000/EESK.2010.14.2.049 ↗
12. Kim, J. S., Kwon, M. H., Seo, H. S., Lim, J. H., & Kim, D. Y. (2013). An experimental study on seismic performance evaluation of retrofitted column of FRP seismic reinforcement that can be emergency construction. Journal of the Korea Institute for Structural Maintenance and Inspection, 17(6), 21–30. In Korea.10.11112/jksmi.2013.17.6.021 ↗
13. KMA, Korea Meteorological Administration, Earthquake. (2016). Retrieved from http://www.kma.go.kr/mini/earthquake/main.jsp. (In Korea).
14. Lee, D. H., Oh, J. K., Yu, W. D., & Choi, E. S. (2012). Seismic performance of RC columns confined by outside lateral reinforcement. Journal of the Korean Society of Civil Engineers, 32(3), 189–196. In Korea.
15. Chen, Z. F., Wan, L. L., Lee, S., Ng, M., Tang, J. M., Liu, M., & Lee, L. (2008). Evaluation of CFRP, GFRP and BFRP material systems for the strengthening of RC slabs. Journal of Reinforced Plastics and Composites., 27, 1233–1243.10.1177/0731684407084122 ↗
16. Li, Y. F., Chang, S. Y., Tzeng, W. C., & Huang, K. (2003). The pseudo dynamic test of RC bridge columns analyzed through the Hilbert–Huang transform. Journal of Mechanics, 19(3), 373–387.10.1017/S1727719100003221 ↗
17. Lu, X. Z., Teng, J. G., Ye, L. P., & Jiang, J. J. (2005). Bond–slip models for FRP sheets/plates bonded to concrete. Engineering Structures, 27(6), 920–937.10.1016/j.engstruct.2005.01.014 ↗
18. MacRae, G. A., & Kawashima, K. (1997). Post-earthquake residual displacements of bilinear oscillators. Earthquake Engineering & Structural Dynamics, 26(7), 701–716.10.1002/(SICI)1096-9845(199707)26:7<701::AID-EQE671>3.0.CO;2-I ↗
19. Marriott, D., Pampanin, S., & Palermo, A. (2009). Quasi-static and pseudo-dynamic testing of unbonded post-tensioned rocking bridge piers with external replaceable dissipaters. Earthquake Engineering and Structural Dynamics, 38(3), 331–354.10.1002/eqe.857 ↗
20. Shing, P. S. B., & Vannan, M. T. (1991). Implicit time integration for pseudo dynamic tests: convergence and energy dissipation. Earthquake Engineering and Structural Dynamics, 20(9), 809–819.10.1002/eqe.4290200902 ↗
21. Truong, G. T., Dinh, N. H., & Kim, J. C. (2017). Seismic performance of exterior RC Beam–column joints retrofitted using various retrofit solutions. International Journal of Concrete Structures and Materials, 11(3), 415–433.10.1007/s40069-017-0203-x ↗
22. Yang, Y. S., Wang, K. J., Wang, S. J., Hsu, C. W., Tsai, K. C. & Hsieh, S. H. (2004). Networked pseudo-dynamic testing part I: Database approach, In Proceedings of the 13th World Conference on Earthquake Engineering, Vancouver, BC, Canada (pp. 1910–1919).
23. Youm, K. S., Kwon, T. G., Lee, Y. H., & Hwang, Y. K. (2006). Seismic retrofit of GFRP wrapping on the lap-spliced bridge piers. Journal of the Korean Society of Civil Engineers, 26(2), 311–318. In Korea.
24. Zhang, Q., Zhang, P. P., & Jiao, Q. Z. (2006). Synthesis and characterization of microcapsules with chlorpyrifos cores and polyurea walls. Chemical Research in Chinese Universities, 22(3), 379–382.10.1016/S1005-9040(06)60121-9 ↗