SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA

Steel jacket platforms are the major type of platforms used for offshore Malaysia for water depth from 45 to 80 meters. Worldwide platforms are designed API (LRFD & WSD). The parameters in these codes for Gulf of Mexico (GOM) and North Sea are much higher due to severity of weather. Since thi...

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Main Authors: Idrus, Arazi, Sambu Potty, Narayanan, Abdul Hamid, Mohd Foad, Nizamani, Zafarullah, Cossa, Nelson
Format: Conference or Workshop Item
Institution: Universiti Teknologi Petronas
Record Id / ISBN-0: utp-eprints.6731 /
Published: 2011
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access: http://eprints.utp.edu.my/6731/1/rp055-icsas11.pdf
http://eprints.utp.edu.my/6731/
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spelling utp-eprints.67312017-03-20T01:59:39Z SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA Idrus, Arazi Sambu Potty, Narayanan Abdul Hamid, Mohd Foad Nizamani, Zafarullah Cossa, Nelson TA Engineering (General). Civil engineering (General) Steel jacket platforms are the major type of platforms used for offshore Malaysia for water depth from 45 to 80 meters. Worldwide platforms are designed API (LRFD & WSD). The parameters in these codes for Gulf of Mexico (GOM) and North Sea are much higher due to severity of weather. Since this is not true for Malaysia, these parameters need to be evaluated. This work examines what changes can be made in this regard for future design in this country. The jacket platforms in Malaysia are being designed as per API WSD. The weather conditions in Malaysia are different compared to GOM. The load factor used for environmental load by API and ISO code for extreme event is 1.35. Data for this region needs to be analyzed so that proper reliability based load factors can be developed for this region. For this, the environmental parameters for extreme conditions (100 year) and normal conditions (1-5 year) are considered. Offshore fields in Malaysia are spread over three regions. Wind is measured at 10 m elevation and standard time interval is 1h. To collect data for waves, the stable sea state is taken as 3hour time period. For the design of offshore jacket platforms, global forces from wind are not as important as those which are caused by waves and currents. The ISO recommends the use of 10 minute average mean wind for overall structural analysis and 3 second gust wind speed for design of individual component. The significant wave parameters for single, periodic design wave are height, crest elevation above MSL, period and direction. 2011-07-13 Conference or Workshop Item PeerReviewed application/pdf http://eprints.utp.edu.my/6731/1/rp055-icsas11.pdf Idrus, Arazi and Sambu Potty, Narayanan and Abdul Hamid, Mohd Foad and Nizamani, Zafarullah and Cossa, Nelson (2011) SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA. In: 7th International Conference on Steel & Aluminium Structures, 13th –15th July 2011, Kuching, Sarawak, Malaysia. http://eprints.utp.edu.my/6731/
institution Universiti Teknologi Petronas
collection UTP Institutional Repository
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Idrus, Arazi
Sambu Potty, Narayanan
Abdul Hamid, Mohd Foad
Nizamani, Zafarullah
Cossa, Nelson
SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA
description Steel jacket platforms are the major type of platforms used for offshore Malaysia for water depth from 45 to 80 meters. Worldwide platforms are designed API (LRFD & WSD). The parameters in these codes for Gulf of Mexico (GOM) and North Sea are much higher due to severity of weather. Since this is not true for Malaysia, these parameters need to be evaluated. This work examines what changes can be made in this regard for future design in this country. The jacket platforms in Malaysia are being designed as per API WSD. The weather conditions in Malaysia are different compared to GOM. The load factor used for environmental load by API and ISO code for extreme event is 1.35. Data for this region needs to be analyzed so that proper reliability based load factors can be developed for this region. For this, the environmental parameters for extreme conditions (100 year) and normal conditions (1-5 year) are considered. Offshore fields in Malaysia are spread over three regions. Wind is measured at 10 m elevation and standard time interval is 1h. To collect data for waves, the stable sea state is taken as 3hour time period. For the design of offshore jacket platforms, global forces from wind are not as important as those which are caused by waves and currents. The ISO recommends the use of 10 minute average mean wind for overall structural analysis and 3 second gust wind speed for design of individual component. The significant wave parameters for single, periodic design wave are height, crest elevation above MSL, period and direction.
format Conference or Workshop Item
author Idrus, Arazi
Sambu Potty, Narayanan
Abdul Hamid, Mohd Foad
Nizamani, Zafarullah
Cossa, Nelson
author_sort Idrus, Arazi
title SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA
title_short SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA
title_full SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA
title_fullStr SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA
title_full_unstemmed SELECTION OF ENVIRONMENTAL PARAMETERS FOR OFFSHORE JACKET PLATFORM DESIGN IN MALAYSIA
title_sort selection of environmental parameters for offshore jacket platform design in malaysia
publishDate 2011
url http://eprints.utp.edu.my/6731/1/rp055-icsas11.pdf
http://eprints.utp.edu.my/6731/
_version_ 1741196097047494656
score 11.62408

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