Behavior Analysis of Buried GFRP Pipes and Flanges

지중 매설 GFRP 관로 및 플랜지의 거동 분석

  • 한택희 (서울메트로 기술연구소) ;
  • 김효산 (서울메트로 기술연구소) ;
  • 장영두 (서울메트로 기술연구소) ;
  • 박윤호 (서울메트로 기술연구소) ;
  • 강영종 (고려대학교 공과대학 건축사회환경공학과)
  • Received : 2010.01.31
  • Accepted : 2010.03.02
  • Published : 2010.03.31


Static analyses and buckling analyses were carried out for buried GFRP pipes by using finite element method. Vehicle loads, vertical and lateral soil pressures were considered as external loads, and supplying water pressure was considered as an internal load. Nine types of the factory-manufactured GFRP pipes were analyzed. Their maximum stresses and displacements were compared with the limit displacements and ultimate stress. Additionally, stress analysis on an enhanced flange, which was designed to reduce stress concentration, was performed. A cantilever analysis was carried out to know the maximum stress on the neck of the flange, which is the critical part. And a static analysis was carried for the buried flange. The test results showed that GFRP pipes were safe and stable against the external loads. And they showed that the enhanced flange decreased about 35% of the stress concentration.



  1. American Association of State Highway and Transportation Officials. (1996). Standard specification for highway bridge. 16th edition, AASHTO, Washington, D.C.
  2. FEA Ltd. (2001). LUSAS Manual, FEA Ltd.
  3. Howard, A. K. (1977). "Modulus of soil reaction values for buried flexible Pipe." Journal of the Geotechnical Engineering Division, Vol. 103, No. GT1, pp. 33-43.
  4. Han, T. K., Kim, S. N., Knag, Y. J., Yoon, K. Y. (2004). "An Experimental Study of Material Characteristics for GFRP Pipes." Korea Society of Hazard Mitigation, Vol. 4, No. 2, pp. 35-45.