Calibration Of Deterministic Parameters For Reassessment Of Offshore Platforms In The Arabian Gulf Using Reliability Based Method
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Calibration Of Deterministic Parameters Reassessment Of Offshore Platforms In The Arabian Gulf
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Author : Hassan Zaghloul
language : en
Publisher: Universal-Publishers
Release Date : 2011-04-18
Calibration Of Deterministic Parameters Reassessment Of Offshore Platforms In The Arabian Gulf written by Hassan Zaghloul and has been published by Universal-Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-18 with categories.
The Arabian Gulf oil and gas production reserves have made it one of the world's strategic producers since the early 1960s, with many of the existing platforms stretched beyond their original design life. Advances in drilling technology and reservoir assessments have extended the requirement for the service life of those existing platforms even further. Extension of the life span of an existing platform requires satisfactory reassessment of its various structural components, including piled foundations. The American Petroleum Institute Recommended Practice 2A (API RP2A) is commonly used in the Arabian Gulf for reassessment of existing platforms. The API guidelines have been developed for conditions in the Gulf of Mexico, the waters off Alaska and the Pacific and Atlantic seaboards of the USA. However, the Arabian Gulf conditions are fundamentally different to those encountered in US waters. Hence, there is a need to develop guidelines for reassessment of existing offshore structures to account for the specific conditions of the Arabian Gulf. This thesis performs statistical analyses on databases collected during this research from existing platforms to calibrate relevant load and resistance factors for the required guidelines. The developed guidelines are based on established approaches used in developing international codes and standards such as API RP2A-LRFD. The outcome of this research revolves around the following three main issues: 1. Calibration of resistance factors for axial capacity of piles driven in the carbonate soils 2. Development of open area live loads (OALL) on offshore platforms 3. Effect of extreme storm conditions on the reliability of existing platforms in the Arabian Gulf The outcomes of this research are expected to have a profound influence onreassessment of existing platforms in the Arabian Gulf.
Calibration Of Deterministic Parameters For Reassessment Of Offshore Platforms In The Arabian Gulf Using Reliability Based Method
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Author : Hassan Zaghloul
language : en
Publisher:
Release Date : 2008
Calibration Of Deterministic Parameters For Reassessment Of Offshore Platforms In The Arabian Gulf Using Reliability Based Method written by Hassan Zaghloul and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Drilling platforms categories.
[Truncated abstract] The Arabian Gulf oil and gas production reserves have made it one of the world's strategic producers since early 1960s, with many of the existing platforms stretched beyond their original design life. Advances in drilling technology and reservoir assessments have extended the requirement for the service life of those existing platforms even further. Extension of the life span of an existing platform requires satisfactory reassessment of its various structural components, including piled foundations. The American Petroleum Institute Recommended Practice 2A (API RP2A) is commonly used in the Arabian Gulf for reassessment of existing platforms. The API guidelines have been developed for conditions in the Gulf of Mexico, the waters off Alaska and the Pacific and Atlantic seaboards of the USA. However, the Arabian Gulf conditions are fundamentally different to those encountered in US waters. Hence, there is a need to develop guidelines for reassessment of existing offshore structures to account for the specific conditions of the Arabian Gulf. This thesis performs statistical analyses on databases collected during this research from existing platforms to calibrate relevant load and resistance factors for the required guidelines. The developed guidelines are based on established approaches used in developing international codes and standards such as API RP2A-LRFD. The outcome of this research revolves around the following three main issues: 1. Calibration of resistance factors for axial capacity of piles driven in the carbonate soils API RP2A (1993, 2000) does not quantify limiting soil parameters for piles driven in carbonate soils and provides a single factor to predict the capacity of piled foundations. This research identifies a set of limiting engineering parameters and calibrates corresponding capacity reduction factors to predict axial capacity of driven piles in the carbonate soils of the Arabian Gulf. ... This contrasts with Section 'R' of API RP2A (1993, 2000), which focuses on extreme environmental conditions when performing reassessment. The probabilities of failure considered in this research do not include errors and omissions (controlled by quality assurance procedures) or material deterioration (controlled by choice of materials, detailing, protective devices, and inspection and repair procedures) or reliability-based maintenance. Addressing operating overload conditions requires attending to two issues, namely the capacity of piles driven in carbonate soils and OALL, which have been addressed in this research. The operational overload situation is likely to occur during shutdown condition or during drilling or work over activities where significant OALL are usually applied to platform decks. Such operational overload can be managed by placing signs at various open areas on the platform nominating the maximum load limits (kPa), introducing procedures that ensure that maximum load limits are not exceeded during operation and management of human behavior by reinforcing the importance of following the procedures. The outcomes of this research are expected to have a profound influence on reassessment of existing platforms in the Arabian Gulf.
Environmental Load Factors And System Strength Evaluation Of Offshore Jacket Platforms
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Author : Zafarullah Nizamani
language : en
Publisher: Springer
Release Date : 2015-01-27
Environmental Load Factors And System Strength Evaluation Of Offshore Jacket Platforms written by Zafarullah Nizamani and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-01-27 with Technology & Engineering categories.
This book presents a study for the determination of environmental load factors for Jacket Platforms in Malaysia and a methodology to determine the life extension of aging platforms. The simplified methods described here could be used for determining not only structural reliability but also safety factors. Its content is particularly interesting to design and maintenance engineers who are working in offshore or onshore industry.
Subsea Engineering Handbook
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Author : Yong Bai
language : en
Publisher: Gulf Professional Publishing
Release Date : 2012-01-13
Subsea Engineering Handbook written by Yong Bai and has been published by Gulf Professional Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-13 with Science categories.
Subsea production systems, overview of subsea engineering, subsea field development, subsea distribution system. Flow assurance and system engineering. Susea structure and equiment. Subsea umbilical, risers and flowlines.
Encyclopedia Of Coastal Science
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Author : M. Schwartz
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-11-08
Encyclopedia Of Coastal Science written by M. Schwartz and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-11-08 with Science categories.
Honorable Mention, Award for Excellence in Scholarly and Professional Publishing Maurice Schwartz, Editor of the much acclaimed Encyclopedia of Beaches and Coastal Environments (Hutchinson Ross, 1982) has now brought forth a new volume with a fresh interdisciplinary approach that includes geomorphology, ecology, engineering, technology, oceanography, and human activities as they relate to coasts. Within its covers the Encyclopedia of Coastal Science includes many aspects of the coastal sciences that are only to be found scattered among scientific literature. Being broadly interdisciplinary in its treatment of coasts, the Encyclopedia of Coastal Science features contributions by 245 well known international specialists in their respective fields and is abundantly illustrated with line-drawings and photographs. Not only does this volume offer an extensive number of entries, it also includes various appendices,an illustrated glossary of coastal geomorphology and extensive bibliographic listings. This Encyclopedia thus provides a comprehensive reference work for students, professionals as well as informed lay readers.
Ultimate Limit State Design Of Steel Plated Structures
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Author : Jeom Kee Paik
language : en
Publisher: John Wiley & Sons
Release Date : 2003-03-28
Ultimate Limit State Design Of Steel Plated Structures written by Jeom Kee Paik and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-03-28 with Technology & Engineering categories.
Steel plated structures are important in a variety of marine and land-based applications, including ships, offshore platforms, power and chemical plants, box girder bridges and box girder cranes. The basic strength members in steel plated structures include support members (such as stiffeners and plate girders), plates, stiffened panels/grillages and box girders. During their lifetime, the structures constructed using these members are subjected to various types of loading which is for the most part operational, but may in some cases be extreme or even accidental. Ultimate Limit State Design of Steel Plated Structures reviews and describes both fundamentals and practical design procedures in this field. The derivation of the basic mathematical expressions is presented together with a thorough discussion of the assumptions and the validity of the underlying expressions and solution methods. Particularly valuable coverage in the book includes: * Serviceability and the ultimate limit state design of steel structural systems and their components * The progressive collapse and the design of damage tolerant structures in the context of marine accidents * Age related structural degradation such as corrosion and fatigue cracks Furthermore, this book is also an easily accessed design tool which facilitates learning by applying the concepts of the limit states for practice using a set of computer programs which can be downloaded. In addition, expert guidance on mechanical model test results as well as nonlinear finite element solutions, sophisticated design methodologies useful for practitioners in industries or research institutions, selected methods for accurate and efficient analyses of nonlinear behavior of steel plated structures both up to and after the ultimate strength is reached, is provided. Designed as both a textbook and a handy reference, the book is well suited to teachers and university students who are approaching the limit state design technology of steel plated structures for the first time. The book also meets the needs of structural designers or researchers who are involved in civil, marine and mechanical engineering as well as offshore engineering and naval architecture.
Iaea Safety Glossary
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Author : International Atomic Energy Agency
language : en
Publisher: IAEA
Release Date : 2007-01
Iaea Safety Glossary written by International Atomic Energy Agency and has been published by IAEA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-01 with Business & Economics categories.
The IAEA Safety Glossary defines and explains technical terms used in IAEA Safety Standards and other safety related IAEA publications, and provides information on their usage. It has been in use since April 2000. The IAEA Safety Glossary, 2007 Edition, is a revised and updated version. The primary purpose of the Safety Glossary is to harmonize terminology and usage in the IAEA Safety Standards. The Safety Glossary is a source of information for users of IAEA Safety Standards and other safety related IAEA publications. The Safety Glossary also provides guidance primarily for the drafters and reviewers of Safety Standards and other publications, including IAEA technical officers and consultants and members of technical committees, advisory groups, working groups and bodies for the endorsement of Safety Standards.
Lessons Learned From Accidental Exposures In Radiotherapy
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Author : International Atomic Energy Agency
language : en
Publisher:
Release Date : 2000
Lessons Learned From Accidental Exposures In Radiotherapy written by International Atomic Energy Agency and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Medical categories.
This Safety Report is a review of a large number of events that may serve as a checklist against which to test the vulnerability of a facility to potential accidents, and to provide a basis for improving safety in the use of radiation in medical applications. Furthermore, it is intended to encourage the development of a questioning and learning attitude, the adoption of measures for the prevention of accidents, and the preparation for mitigation of the consequences of accidents, if they occur.
Offshore Waste Treatment Guidelines
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Author : Canada. National Energy Board
language : en
Publisher:
Release Date : 1996
Offshore Waste Treatment Guidelines written by Canada. National Energy Board and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Offshore oil industry categories.
Hazardous waste, sewage disposal, purification.
Reliability Of Dynamically Sensitive Offshore Platforms Exposed To Extreme Waves
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Author : Jalal Mirzadeh
language : en
Publisher:
Release Date : 2015
Reliability Of Dynamically Sensitive Offshore Platforms Exposed To Extreme Waves written by Jalal Mirzadeh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
The growing interest in the use of offshore platforms in deeper waters and harsher environments, as well as the desire to extend the operation of existing structures beyond their design lives, is increasing attention on the assessment of their dynamic response and their failure conditions under extreme storm loading. There are a large number of factors influencing the performance of dynamically sensitive platforms, but a major issue is how to include all of the irregularity, directionality and nonlinearity that ocean waves cause on their loading. Therefore, the role each plays in the assessment of dynamically sensitive structures under extreme loads is investigated systematically in this thesis. The aim is to develop practical methods to estimate extreme response and the probability of failure of dynamically sensitive offshore structures in a given sea-state. The directionality and nonlinearity of ocean waves has been captured in this thesis by extending the formulations of the NewWave and Constrained NewWave theories. NewWave is a deterministic method that accounts for the spectral composition of the sea-state, and can be used as an alternative to both regular wave and full random time domain simulations of lengthy time histories. Based on this theory a predetermined crest height and the surface elevation around the crest during an extreme event can be theoretically simulated. Constrained NewWave, which is generated by mathematically constraining a NewWave within a random time series, allows the irregularity of ocean waves to be considered. These wave theories have been extended in this thesis to include 2nd order and directionality effects, and their formulations have been written into a new Fortran code for calculation of the water surface and water particle kinematics. The effects of irregularity, directionality and nonlinearity of ocean waves on dynamically sensitive structures are then shown for an example mobile jack-up drilling platform. The sample jack-up platform is modelled in the USFOS software, and includes the effects of material and geometrical nonlinearities as well as spudcan-soil-structure nonlinear interactions. Finally, based on structured application of multiple Constrained NewWaves in combination with the Monte Carlo method, a framework is proposed to estimate the extreme response and the failure probability of dynamically sensitive offshore structures exposed to a given duration of the one extreme sea-state. The results demonstrate that in an extreme event the irregularity, directionality and nonlinearity of ocean waves have considerable effects on the overall performance of the sample jack-up platform. It is shown that the extreme response and the probability of failure of the sample jackup are not only governed by the maximum crest elevation but also depend on the random background of ocean waves. In addition, it is indicated that the inclusion of the directionality effects of ocean waves results in reductions in the extreme response and failure rate of the sample jack-up platform. On the other hand, the nonlinearity effects cause additional energy in low and high frequencies and raise the crest height, which increases the extreme response of the sample jack-up platform. The methods developed in this thesis have application to any dynamically sensitive structure and will help reduce the level of uncertainty in predicting their extreme response or failure probability. This may help in extending their operational conditions, say into deeper waters and harsher sea-states, or in extending their operational life.