Elastic Behavior Characteristics of GFRP Pipes Reinforced Ribs

리브로 보강된 GFRP 관로의 탄성 좌굴거동 특성

  • 한택희 (고려대학교 공학기술연구소) ;
  • 서주형 (현대건설주식회사) ;
  • 염응준 (고려대학교 토목환경공학과) ;
  • 강영종 (고려대학교 사회환경시스템공학과)
  • Received : 2006.06.28
  • Accepted : 2006.09.07
  • Published : 2006.12.27


The elastic buckling strength of a Glass Fiber Reinforced Plastic (GFRP) pipe reinforced with ribs was evaluated. The height and thickness of a rib and the spacing between two adjacent ribs were considered as factors affecting the buckling strength of the pipe. And also, the ratio of the longitudinal stiffness and transverse stiffness was considered as the parameter affecting the buckling strength as the GFRP is orthotropic material. Buckling strengths of various GFRP pipe models with different shapes and stiffness ratios were evaluated by FE analyses and a formula to estimate the elastic buckling strength of a rib-reinforced pipe made of orthotropic material was suggested from the regression with the results from the FE analysis. Analytical results show that a rib-reinforced pipe has a buckling strength superior to a general flat pipe and the suggested formula estimates accurate buckling strength of the rib-reinforced pipe.


Supported by : 삼성물산(주) 건설부문


  1. (주)한국화이바 (2002) 내식성 및 내노후성 상하수도용 유리섬유 복합관, 부품 및 생산기술 개발, 연구보고서, (주)한국화이바
  2. Dutta PK, Hui D. (1997) Creep study of FRP composite rebars for concrete, Proceedings of ICCM-11, Gold Coast, Au
  3. Papangelis, J.P., Trahair, N.S. (1987) Flexural-Torsional Buckling of Arches, Journal of Structural Engineerings, ASCE, Vol. 113(4), pp.889-906 https://doi.org/10.1061/(ASCE)0733-9445(1987)113:4(889)
  4. Marston (1930) The Theory of External Loads on Closed Conduits, Bulletin No.96, Iowa ENG
  5. Timoshenko, S.P., Gere, M. (1961) Theory of Elastic Stability, 2nd Ed., McGraw-Hill, Inc.
  6. Rajasekaran, S., Padmanabhan, S. (1989) Equations of Curved Beams, Journal of Engineering Mechanics, ASCE, Vol. 115(5), pp.1094-1111 https://doi.org/10.1061/(ASCE)0733-9399(1989)115:5(1094)
  7. Simitses GJ., Shaw D, Sheinman I. (1985) Stability of imperfect laminated cylinders: a comparison between theory and experiment, AIAA Journal, Vol. 23, pp.1086-1092 https://doi.org/10.2514/3.9041
  8. Spangler (1948) Underground Conduits Transaction ASCE, Vol. 113
  9. Tennyson RC. (1975) Buckling of Laminated Composite Cylinders, Composites, pp.17-24
  10. Watkins (1993) Structural Mechanics of Buried Pipes, Utah UNI., UT 84322