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Titre du document / Document title

Effect of Grouting in Jacket Type Offshore Platforms Pile-Leg Interaction in Nonlinear Range of Deformation

Auteur(s) / Author(s)

HONARVAR M. R. (1) ; BAHAARI Candidate M. R. (1) ; ASGARIAN B. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) School of Civil Engineering, University College of Engineering, University of Tehran, Tehran 15875-4416, IRAN, REPUBLIQUE ISLAMIQUE D'
(2) Civil Engineering, K.N. Toosi University of Technology, Tehran 15875-4416, IRAN, REPUBLIQUE ISLAMIQUE D'

Résumé / Abstract

The annulus between the pile and leg in jacket type offshore platforms may be filled with cement grout mainly to reduce horizontal deflections, inhibit corrosion, and increase the energy absorption capacity. This paper discusses an approach, which can be used to demonstrate an enhanced structural performance due to the both presence and lack of grouted piles. The compressive stress-strain response of the grout has been derived from the performed experiments. Having this response, the fiber beam column post-buckling element in the commercial code, DRAIN-3DX, was being used to investigate the behavior of grouted and ungrouted jackets and also the relative pile-leg interaction. It is therefore concluded that in the cases where the existing structure is ungrouted or incompletely grouted, adequate grouting can be considered as a relatively inexpensive method to improve the strength and performance of the structure. In fact, the cement filling of a tubular member increases its overall strength and also provides additional stability. The lateral force-deformation curves are equivalents for the cases where the axial force is less than 30% of the yielding force, Pyieiding. However, as the axial force increases, the grouted portal element gradually gives a much better performance compared to the ungrouted element. By increasing the axial force, the lateral hysteretic behavior deteriorates in both grouted and ungrouted cases; however, this deterioration is more severe in the case of an ungrouted portal element.

Revue / Journal Title

Journal of offshore mechanics and Arctic engineering    ISSN  0892-7219 

Source / Source

2008, vol. 130, no4, [Note(s): 041302.1-041302.8] (20 ref.)

Langue / Language

Anglais

Editeur / Publisher

American Society of Mechanical Engineers, New York, NY, ETATS-UNIS  (1987) (Revue)

Mots-clés anglais / English Keywords

Experimental study

;

Non linear effect

;

Axial load

;

Beam column structure

;

Cement

;

Production platform

;

Jacket platform

;

Axial force

;

Postbuckling

;

Fiber buckling

;

Energy dissipation

;

Energy absorption

;

Corrosion

;

Mots-clés français / French Keywords

.

;

Etude expérimentale

;

Effet non linéaire

;

Charge axiale

;

Structure poutre poteau

;

Ciment

;

Plateforme production

;

Plateforme treillis

;

Force axiale

;

Postflambage

;

Flambage fibre

;

Dissipation énergie

;

Absorption énergie

;

Corrosion

;

Mots-clés espagnols / Spanish Keywords

Estudio experimental

;

Efecto no lineal

;

Carga axial

;

Estructura viga-columna

;

Cemento

;

Plataforma producción

;

Plataforma entramada

;

Fuerza axial

;

Post-pandeo

;

Pandeo fibra

;

Disipación energía

;

Absorción energía

;

Corrosión

;

Localisation / Location

INIST-CNRS, Cote INIST : 6120 P, 35400018431156.0050

Nº notice refdoc (ud4) : 20829063



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