DOI QR코드

DOI QR Code

Nonlinear Analysis of FRP Jacketed Concrete Beams by Mixed Finite Elements

혼합유한요소에 의한 FRP 피복 콘크리트 보의 비선형해석

  • Published : 2013.09.25

Abstract

This research presents a nonlinear mixed frame fiber finite element formulation of FRP confined concrete members. Since the mixed finite element formulation don't use the displacement shape functions, the formulation in nonlinear problem can satisfy the equilibrium not only in the section and element levels but also in the structural level. Concrete in compression is modeled as an inelastic material in triaxial stress state in order to predict confining effect of concrete. The FRP sheet is modeled as a layered composite material in two-dimension. A series of four-point bending test of CFRP sheet and concrete composite beams with circular sections is analyzed by the current mixed finite element model. Compared with the test results, it was shown that the model could give well predicted load-deflection responses in the structural level as well as axial and hoop strains in section levels.

Keywords

References

  1. Cho, C. G., Kwon, M., and Spacone, E., "Analytical Model of Concrete-Filled Fiber-Reinforced Polymer Tubes based o n Multiaxial Constitutive Laws", ASCE Journal of Structur al Engineering, Vol. 131, No. 9, 2005, p.p. 1426-1433 https://doi.org/10.1061/(ASCE)0733-9445(2005)131:9(1426)
  2. 조창근, "FRP 콘크리트 복합구조 부재시스템의 휨 및 전단 거동예측", 대한건축학회논문집 구조계, 20권, 8호, p.p. 35-42, 2004
  3. 조창근, 한병찬, 이정한, 김윤용, 압출성형 ECC 패널을 이용하여 제작된 복합바닥슬래브의 휨 거동, 콘크리트학회 논문집, Vol. 22, No. 5, p.p. 695-702, 2010
  4. Spacone, E.(1994), Flexibility-based Finite Element Models for the Nonlinear Static and Dynamic Analysis of Concrete Frame Structures, Ph.D Thesis, Univ. of California, Berkeley
  5. Spacone, E., Filippou, F.C., and Taucer, F.F. (1996), Fibre Beam-Column Model for Nonlinear Analysis of R/C Frames: Part I. Formulation, Earthquake Engineering and Structural Dynamics, Vol. 25, p.p. 711-725 https://doi.org/10.1002/(SICI)1096-9845(199607)25:7<711::AID-EQE576>3.0.CO;2-9
  6. Cho, C.G., Kwon, M. (2011), Nonlinear failure prediction of concrete composite columns by a mixed finite element formul ation, Engineering Failure Analysis, Vol. 18, p.p. 1723-1734 https://doi.org/10.1016/j.engfailanal.2011.03.018
  7. Clough, R. and Johnston, S. (1966), Effect of Stiffness Degradation on Earthquake Ductility Requirements, Transactio ns of Japan Earthquake Engineering Symposium, p.p. 195-198, Tokyo
  8. Giberson, M. (1967), The Response of Nonlinear Multi-Story Structures Subjected to Earthquake Excitations, Earthquake Engineering Research Laboratory, Pasadena.
  9. Otani, S. (1974), Inelastic Analysis of R/C Frame Structures, Journal of Structural Engineering, ASCE, 100 (ST7) p. p. 1433-1449
  10. Meyer, C., Roufaiel, M.S., and Arzoumanidis, S.G. (1983), Analysis of Damaged Concrete Frames for Cyclic Loads, Earthquake Engineering and Structural Dynamics, Vol. 11, p.p. 207-228 https://doi.org/10.1002/eqe.4290110205
  11. Cho, C.G. and Kwon, M. (2004), Development and Modeling of Frictional Wall Damper and Its Application In R/C Frame Structures, Earthquake Engineering and Structural Dynamics, Vol. 33 (7), p.p. 821-838 https://doi.org/10.1002/eqe.379
  12. Mari, A. and Scordelis, A. (1984), Nonlinear Geometric Material and Time Dependent Analysis of Three Dimensional Reinforced and Prestressed Concrete Frames, SESM Report 82-12, Dept. of Civil Eng., Univ. of California, Berkeley
  13. 조창근, 김영상, 하중-기초 유한요소 부재 비선형 정밀해법 알고리즘, 대한건축학회논문집 구조계, 21권, 3호, p.p. 53-60 2005
  14. Saenz, L.P. (1964). "Discussion of equation for the stress-strain curve of concrete by Desayi and Krishman", Journal of ACI, Vol. 61, p.p. 1229-1235
  15. Burgueno, R. (1999), System characterization and design of modular fiber reinforced polymer (FRP) short- and medium-span bridges, PhD Thesis, University of California, SanDiego
  16. Kupfer, H.B. and Gerstle, K.H. (1973). "Behavior of concrete under biaxial stresses", Journal of Engineering Mechanics Division, ASCE, Vol. 99, No. 4, p.852, p.866