covid
Buscar en
Ciência & Tecnologia dos Materiais
Toda la web
Inicio Ciência & Tecnologia dos Materiais Welding assessment of a damaged crane pedestal of a container ship
Información de la revista
Vol. 27. Núm. 1.
Páginas 10-14 (enero - junio 2015)
Compartir
Compartir
Descargar PDF
Más opciones de artículo
Vol. 27. Núm. 1.
Páginas 10-14 (enero - junio 2015)
Acceso a texto completo
Welding assessment of a damaged crane pedestal of a container ship
Visitas
2093
M. Fontea,b,
Autor para correspondencia
fonte@enautica.pt

Corresponding author. Tel.: +351 214460010.
, M. Freitasb, B. Lib, P. Duartea, L. Reisb
a Escola Superior Náutica Infante D. Henrique, 2770-053 Paço de Arcos, Portugal
b IDMEC- IST, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
Este artículo ha recibido
Información del artículo
Abstract

A structural integrity assessment of a damaged crane pedestal/column of a container ship is presented. Crane cabins and pedestal/columns are subjected to fatigue coupled with sudden overloads during cargo operations and corrosion effects due to sea environment. Significant number of surface cracks was detected around the pedestal/column, at inner and outside of the crane foundation, close to the main weld seam and, in consequence, the ship-owner ordered a survey. The main weld seam and the sites where cracks were found are evaluated in the present study. For the purpose, the sample material (hot rolled steel plate and upper ring) of the pedestal was provided by the shipyard and macro and micrographics were observed. Results did not show any cracks, although they have been found by the NDT technical services of the shipyard which have decided to remove them by the grinding process. The weld seam did not also show relevant defects, whereby the replacing of the pedestal/column by a new one would not had been necessary. Regardless of some occasional overloads, the surface cracks found on the pedestal/column could be a consequence of the normal operation conditions of the crane during the last 5 years and also due to poor maintenance.

Keywords:
structural failure survey
weld macrostructures
structural integrity
pedestal/column of container ship.
El Texto completo está disponible en PDF
References
[1]
R.E. Melchers.
Corrosion (NACE), 58 (2002), pp. 9
[2]
S.C. Guedes, Y. Garbatov, A. Zayed, G. Wang.
Corrosion Science, 51 (2009),
[3]
S. Qin, W. Cui..
Marine Structures, 16 (2003), pp. 1
[4]
S.C. Guedes, Y. Garbatov.
Journal of Ship Research, 40 (1996), pp. 3
[5]
IACS. Int. Association of Classific. Societies. Unified Requirements Group Z, 2005.
[6]
M.T. Gudze, R.F. Melchers.
Corrosion Sci, 50 (2008),
[7]
R.H. Leggatt.
Int. Journal of Pressure Vessels and Piping, 85 (2008),
[8]
A.R. Ebrahimi, A. Abyasi, S.M. Abbasi.
International Journal of ISSI, 5 (2008),
Opciones de artículo
es en pt

¿Es usted profesional sanitario apto para prescribir o dispensar medicamentos?

Are you a health professional able to prescribe or dispense drugs?

Você é um profissional de saúde habilitado a prescrever ou dispensar medicamentos