Creep of Geotextiles Using Time–Temperature Superposition Methods
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 130, Issue 11
Abstract
A temperature-accelerated tensile testing program was conducted in this study to characterize a woven polypropylene geotextile regarding its long-term stress–strain response, creep failure, and tensile strength remaining after sustained creep loading. Specimens were tested in a load frame that allowed control of multistage load paths. Consistent with current standards for rapid loading of geotextiles, roller-type grips capable of accommodating wide-width specimens were used in this study. The test program included: (i) Rapid loading tensile tests at room and elevated temperatures; (ii) conventional and temperature-accelerated creep tests; and (iii) rapid loading tensile tests conducted after sustained creep loading. Creep strain data for periods beyond 100 years were collected at various load levels using long tests involving the stepped isothermal method. The creep–failure curve, traditionally defined as time to rupture for sustained creep loading at various load levels, was defined in this study as the deviation of the creep curve from linear behavior in a semilogarithmic scale. A new approach was implemented to quantify and reference the residual tensile strength obtained from rapid loading at elevated temperatures of specimens that had been subjected to sustained creep. In spite of the significant slope in the creep-failure curve of the geosynthetic tested in this study, the residual tensile strength exceeds 90% of the ultimate tensile strength. An alternative to the current design approach, which involves use of creep-failure curves to define creep reduction factors is proposed. This involves use of creep-induced tensile strength loss, creep failure, and creep strains in the design of reinforced soil structures.
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References
1.
Baras, L.C. S., Bueno, B.S., and Costa, C.M. L. ( 2002). “On the evaluation of stepped isothermal method for characterizing creep properties of geotextiles.” Proc., 7th Int. Conf. on Geosynthetics, A. A. Balkema, 1515–1518.
2.
Bernardi, M., and Paulson, J. ( 1997). “Is creep a degradation phenomenon?” Mechanically stabilized backfill, 289–294.
3.
Bush, D.I. ( 1990). “Variation of long-term design strength of geosynthetics in temperatures up to .” Proc., 4th Int. Conf. on Geotextiles, Geomembranes, and Related Products, 673–676.
4.
Elias, V., Christopher, B. R., and Berg, R. R. ( 2001). “Mechanically stabilized earth walls and reinforced soil slopes design and construction guidelines.” Publication No. FHWA NH-00-043.
5.
Farrag, K. (1998). “Development of an accelerated creep testing procedure for geosynthetics. II: Analysis.” ASTM Geotech. Test. J., 21(1), 38–44.
6.
Ferry, J.D. ( 1980). Viscoelastic properties of polymers, 3rd Ed., Wiley, New York.
7.
Geosyntec Consultants. (1996). “Summary report of findings.” Rep. No. SWP-9, Prepared for New Cure, Inc., Operating Industries, Inc. Landfill, Monterey Park, Calif.
8.
Geosynthetic Research Institute GRI. (1997). “Grip types for use in the wide width testing of geotextiles and geogrids.” Interim Standards, GT9, Geosynthetic Research Institute, Folsum, Pa.
9.
Greenwood, J.H., Jones, C.J. F. P., and Tatsuoka, F. ( 2001). “Residual strength and its application to design of reinforced soil in seismic areas.” Proc. Int. Symp. in Earth Reinforcement, IS-Kyushu, Balkema, Rotterdam, The Netherlands, 37–42.
10.
Koerner, R. M., Lord, A. E., Jr., and Hsuan, Y. H. (1992). “Arrhenius modeling to predict geosynthetic degradation.” Geotext. Geomembr., 11(2), 151–183.
11.
Leshchinsky, D., and Fowler, J. (1990). “Laboratory measurement of load-elongation relationship of high-strength geotextiles.” Geotext. Geomembr., 9(2), 145–164.
12.
McGown, A., Andrawes, K.Z., and Kabir, M.H. ( 1982). “Load-extenstion testing of geotextiles confined in soil.” Proc., 2nd. Int. Conf. Geotextiles, Vol. 3, 793–798.
13.
Myles, B. and Carswell, I.G. ( 1986). “Tensile testing of geotextiles.” Proc. of the Third International Conference on Geotextiles, 713–718.
14.
Orsat, P., Khay, M., and McCreath, M. ( 1998). “Study on creep rupture of polyester tendons: Full-scale tests.” Proc., 6th Int. Conf. on Geosynthetics, Atlanta, 675–678.
15.
Thornton, J.S., Allen, S.R., Thomas, R.W., and Sandri, D. ( 1998a). “The stepped isothermal method for time–temperature superposition and its application to creep data on polyester yarn.” Proc., 6th Int. Conf. on Geosynthetics, Atlanta, 699–706.
16.
Thornton, J.S., Paulson, J.N., and Sandri, D. ( 1998b). “Conventional and stepped isothermal methods for characterizing long term creep strength of polyester geogrids.” Proc., 6th Int. Conf. on Geosynthetics, Atlanta, 691–698.
17.
Thornton, J.S., Sprague, C.J., Klompmaker, J., and Wedding, D.B. ( 1999). “The relationship of creep curves to rapid loading stress-strain curves for polyester geogrids.” Proc., Geosynthetics ’99, 735–744.
18.
Wu, J. T. H., and Helwany, S. M. B. (1996). “A performance test for assessment of long-term creep behavior of soil-geosynthetic composites.” Geosynthet. Int. 3(1), 107–124.
19.
Zornberg, J. G., and Kavazanjian, E. (2001). “Prediction of the performance of a geogrid-reinforced slope founded on solid waste,” Japanese Geotechnical Society. Soils Found.,41(6), 1–16
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Copyright © 2004 ASCE.
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Published online: Oct 15, 2004
Published in print: Nov 2004
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