Pipe Stiffness of Buried Glass Fiber Reinforced Polymer Plastic (GFRP) and Polymer Mortar Pipe with Symmetrical Cross-Section

Abstract:

Recently, glass fiber reinforced polymer plastic (GFRP) pipes are increasing trend in using in the water-supply system because of their advantages such as light-weight, corrosion resistance, etc. GFRP pipes discussed in this paper have polymer mortar layer for core sandwiched between two tape-winding glass fiber reinforced polymer plastic layers. So, GFRP pipe properties for the design such as pipe stiffness (PS) and equivalent modulus of elasticity (Eeq) is complicated to predict or to measure. In this study, we proposed the equation that can predict the equivalent pipe stiffness factor (EI) in relation to PS and Eeq using thickness of each material layer. The predicted result obtained by the equation proposed in this paper is compared with experimental result ASTM D 2412(2010). As a result, it was in the range of-3% to +7%. So, this proposed obtained according to equation can be used to design GFRP pipe used in practice.

• Periodical: Key Engineering Materials (Volume 730)
• Pages: 496-501
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.730.496
• Online since: February 2017
• Authors: Jae Ho Lee, Jin Sang Choi, Dong Min Ok, Sun Hee Kim, Soon Jong Yoon*
• Keywords: Buried Pipe, Design Method, Flexible Pipe, GFRP Pipe, Pipe Stiffness, Pipe Thickness

References

[1] W. R. Whidden, Buried Flexible Steel Pipe Design and Structural Analysis, ASCE, (2009).

[2] J. M. Gere, B. J. Goodno, Mechanics of Materials 7th Edition, CENGAGE Learning, (2009).

[3] HanKook Fiber, Design Method of GRP Pipe, (2016).

[4] ASTM D 2412, Standard Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel-Plate Loading, West Conshohocken, (2010).

DOI: 10.1520/d2412-11

[5] R. K. Watkins, L. R. Anderson, Structural Mechanics of Buried Pipes, CRC Press, (2000).

[6] E. J. Lee, Mechanical Properties and Structural Behavior of GRP Composite Pipe for Water Supply and Drainage, M.S. Thesis, Hongik University, Seoul (2008).

[7] B. B. Lee, An Experimental Investigation on the Structural Behavior of GFRP Pipes, M.S. Thesis, Hongik University, Seoul (2009).

[8] J. S. Park, W. H. Hong, W. Lee, J. H. Park, S. J. Yoon, Pipe Stiffness Prediction of Buried GFRP Flexible Pipe, Polym. Polym. Comp. 22(1) (2014) 17-23.

DOI: 10.1177/096739111402200103

[9] A. P. Moser, Buried Pipe Design, 2nd Edition, (2001).