DOI QR코드

DOI QR Code

Seismic Performance of Circular Concrete Bridge Piers Externally Strengthened by Carbon Fiber Reinforced Polymer

탄소섬유강화 플라스틱(CFRP)로 보강된 원형콘크리트 교각의 지진성능 평가

  • 마벨 (상명대학교 건설시스템공학과) ;
  • 박종섭 (상명대학교 건설시스템공학과)
  • Received : 2019.12.08
  • Accepted : 2020.02.06
  • Published : 2020.04.01

Abstract

This paper evaluated the optimum Carbon Fiber Reinforced Polymer (CFRP) using a circular concrete bridge pier subjected to dynamic loading. A three-dimensional finite element model was simulated using finite element program, ABAQUS. Concrete Damage Plasticity (CDP) option and plastic properties of the materials were incorporated to model the non-linearity of the structure. The analyses parameters were changed in length-to-height ratio and width-to-span ratio where columns were subjected to dynamic loading. Numerical analysis was conducted, and the seismic performance of the structures were evaluated by analyzing the ductility behavior of the structure. Results showed that the use of CFRP enhances the structural performance of column and revealed that the increase in length-to-height ratio plays vital role of improving the performance of the structure than the change in width-to-span ratio.

본 연구에서는 콘크리트 원형 교각의 동적거동 특성을 향상시키기 위하여 최적의 탄소섬유강화 플라스틱 설치 방법에 대해서 해석적 기법을 적용하여 평가하였다. 범용구조해석 프로그램인 ABAQUS가 해석연구에 사용되었으며, 소성 및 손상 콘크리트 재료특성을 적용하여 구조물의 비선형해석을 실시하였다. CFRP 적용에 따른 내진성능 향상도를 분석하고자 교각높이와 보강된 높이 비율, 교각 지름 대비 CFRP 보강 두께를 해석변수로 고려하여 거동특성과 연성도를 비교 분석하였다. 해석결과를 토대로 보강에 따른 정량적인 성능향상을 확인할 수 있었으며, 보강 재료 두께 증가보다는 교각높이 대비 보강높이 비율이 보다 성능에 큰 영향을 미치는 것을 알 수 있었다.

Keywords

References

  1. ABAQUS (2013). Standard user's manual, Version 6.7, Hibbit, Karlsson and Sorensen, Inc.
  2. ACI 440.2R-02 (2002). Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures, American Concrete Institute.
  3. Chai, Y. H., Priestley, M. J. N. and Seible, F. (1991). "Seismic retrofit of circular bridge columns for enhanced flexural performance." ACI Structural Journal, Vol. 88, No. 5, pp. 572-584. DOI: 10.14359/2759.
  4. Ehsani, M. R., Saadatmanesh, H. and Tao, S. (1993) "Bond of GFRP rebars to ordinary- strength concrete." International Symposium on Fiber-Reinforced-Plastic Reinforcement for Concrete Structures, ACI-SP-138, Vol. 138, pp. 333-346, DOI: 10.14359/3930.
  5. Grace, N. F., Soliman, A. K., Abdel-Sayed, G. and Saleh, K. R. (1998). "Behavior and ductility of simple and continuous FRP reinforced beams." Journal of Composites for Construction, Vol. 2, No. 4, pp. 186-194. DOI: 10.1061/(ASCE)1090-0268(1998)2:4(186).
  6. Han, K. B., Cho, D. Y. and Kim, J. S. (2016). "Seismic performance evaluation and improvement for damaged reinforcement concrete piers using a fiber steel composite plate." JVE International Ltd. Journal of Vibroengineering, Vol. 18, No. 7, pp. 4574-4582, DOI: 10.21595/jve.2016.17422.
  7. Jeong, S. M. (1994). Evaluation of ductility in prestressed concrete beams using fiber reinforced plastic tendons, Ph.D. Thesis, University of Michigan, Ann Arbor, Mich.
  8. Katsumata, H., Kobatake, Y. and Takeda, T. (1988). "A study on strengthening with carbon fiber for earthquake-resistant capacity of existing reinforced concrete columns." Proceedings of the 9th. World Conference Earthquake, Tokyo, Japan.
  9. Monti, G., Nistico, N. and Santini, S. (2001). "Design of FRP jackets for upgrade of circular bridge piers." Journal of Composites for Construction, Vol. 5, No. 2, pp. 94-101. DOI: 10.1061/(ASCE)1090-0268(2001)5:2(94).
  10. Ozcan, O., Binici, B. and Ozcebe, G. (2008). "Improving seismic performance of deficient reinforced concrete columns using carbon fiber-reinforced polymers." Engineering Structures, Vol. 30, No. 6, pp. 1632-1646. DOI: 10.1016/j.engstruct.2007.10.013.
  11. Pantelides, C. and Gergely, J. (2002) "Carbon-fiber-reinforced polymer seismic retrofit of RC bridge bent: Design and in situ validation." Journal of Composites for Construction, Vol. 6, No. 1, pp. 52-60, DOI: 10.1061/(asce)1090-0268(2002)6:1(52).
  12. Pateriya, R., Akhtar, S. and Rajvaidya, N. (2015). "Analysis of compressive strength of columns reinforced with steel & FRP bars." International Journal of Recent Development in Engineering and Technology, IJRDET, Vol. 4, No. 6, pp. 1-5.
  13. Priestley, M. J. N., Seible, F. and Fyfe, E. (1992). "Column seismic retrofit using fiberglass/epoxy jackets." Proceedings of Advanced Composite Materials in Bridges and Structures, Canadian Society for Civil Engineering, Sherbrooke, Quebec, Canada. pp. 287-298.
  14. Priestley, M. J. N., Seible, F., Xiao, Y. and Verma, R. (1984). "Steel jackets retrofitting of reinforced concrete bridge columns for enhanced shear strength - Part 2: Test results and comparison with theory." ACI Structural Journal, Vol. 91, No. 5, pp. 537-551.
  15. Rashid, M. A. and Mansur, M. A. (2005). "Reinforced high-strength concrete beams in flexure." ACI Structural Journal, Vol. 102, No. 3, pp. 462-471, DOI: 10.14359/14418.
  16. Rodriguez, J., Martinez, F. and Marti, J. (2013). "Concrete constitutive model, calibration and applications." Proceeding Conference 2013 SIMULIA Community Conference, Conference: SIMULIA Community Conference, Vienna, Austria.
  17. Saadatmanesh, H., Ehsani, M. R. and Jin, L. (1996). "Seismic strengthening of circular bridge pier models with fiber composites." ACI Structural Journal, Vol. 93, No. 6, pp. 639-647.
  18. Senturk, M. and Pul, S. (2017). "Finite element analysis for obtaining structural performance of bridge pier interacting with soil" Proceeding Conference SMAR 2017 - Fourth Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures, Zurich, Switzerland.
  19. Sun, Z., Seible, F. and Priestley, M. J. N. (1992). "Diagnostics and retrofit of rectangular bridge columns for seismic loads." Proceedings of the 8th U.S.-Japan Bridge Engineering Workshop, Chicago, USA, pp. 282-296.
  20. Taghia, P. and Bakar, S. (2013). "Mechanical behaviour of confined reinforced concrete-CFRP short column- based on finite element analysis." World Applied Sciences Journal, Vol. 24, No. 7, pp. 960-970. DOI: 10.5829/idosi.wasj.2013.24.07.1156.
  21. Tedesco, J. W., Stallings. J. M. and El-Mihilmy, M. (1999). "Finite element method analysis of a concrete bridge repaired with fiber reinforced plastic laminates." Computers and Structures, Vol. 72, No. 1-3, pp. 379-407. DOI: 10.1016/S0045-7949(99)00010-3.
  22. Teng, J. G., Chen, J. F., Smith, S. T. and Lam, L. (2002). FRP strengthened RC Structures, John Wiley & Sons, New York, USA.
  23. Toutanji, H. (1999). "Stress-strain characteristics of concrete columns externally confined with advanced fiber composite sheets." ACI Materials Journal, Vol. 96, No. 3, pp. 397-404. DOI: 10.14359/639.
  24. Wang, Y. C. and Restrepo J. I. (2001). "Investigation of concentrically loaded reinforced concrete columns confined with glass fiber-reinforced polymer jackets." ACI structural journal, Vol. 97, No. 3, pp. 377-385. DOI: 10.14359/10226.
  25. Yamasaki, Y., Masuda, Y., Tanano, H. and Shimizu, A. (1993). "Fundamental properties of continuous fiber bars." International Symposium on Fiber-Reinforced-Plastic Reinforcement for Concrete Structures, ACI-SP-138, pp. 715-730. DOI: 10.14359/3952.
  26. Ye, L. P., Zhang, K., Zhao, S. H. and Feng, P. (2003). "Experimental study on seismic strengthening of RC columns with wrapped CFRP sheets." Construction and Building Materials, Vol. 17, pp. 499-506. DOI: 10.1016/S0950-0618(03)00047-3.
  27. Zeng, J., Guo, Y., Li, L. and Chen, W. (2018). "Behavior and three-dimensional finite element modeling of circular concrete columns partially wrapped with FRP strips." Polymers, Vol. 10, No. 3. DOI: 10.3390/polym10030253.