A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Critical appraisal of current practice in buried thermoplastic pipe design
Current design practices for buried thermoplastic pipelines subject to combined gravity and internal pressure loadings have been considered. Accurate predictions of stabilised deformations are suggested to be neither possible nor necessary, but appropriate structural design methodologies should instead be limit state based. This concept is first considered with reference to observed behaviour under gravity loads only, and the probable effect of internal pressurisation is then addressed. Existing reservations concerning current European design approaches are reinforced, in particular with respect to stress and strain value derivations. In addition, for thermoplastic pressure pipes the beneficial effects of stress redistribution and creep relaxation are generally not considered. It is concluded that the weaknesses in current design practices should be reviewed and user friendly analytical techniques that are more appropriate to modern thermoplastic pipe materials must be developed.
Critical appraisal of current practice in buried thermoplastic pipe design
Current design practices for buried thermoplastic pipelines subject to combined gravity and internal pressure loadings have been considered. Accurate predictions of stabilised deformations are suggested to be neither possible nor necessary, but appropriate structural design methodologies should instead be limit state based. This concept is first considered with reference to observed behaviour under gravity loads only, and the probable effect of internal pressurisation is then addressed. Existing reservations concerning current European design approaches are reinforced, in particular with respect to stress and strain value derivations. In addition, for thermoplastic pressure pipes the beneficial effects of stress redistribution and creep relaxation are generally not considered. It is concluded that the weaknesses in current design practices should be reviewed and user friendly analytical techniques that are more appropriate to modern thermoplastic pipe materials must be developed.
Critical appraisal of current practice in buried thermoplastic pipe design
Kritische Abschätzung der heutigen Praxis der Auslegung von thermoplastischen Rohren für Erdleitungen
Boot, J.C. (author) / Headford, A.L. (author)
Plastics, Rubber and Composites Processing and Applications ; 25 ; 180-185
1996
6 Seiten, 9 Bilder, 26 Quellen
Article (Journal)
English
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