API RP 2A-WSD: Planning, Designing, and Constructing Fixed Offshore Platforms-Working Stress Design. API RP 2A-WSD. 22nd Edition, November The API tubular joint static design technology has been under continuous development since the first edition of the API RP 2A in In the 3rd edition of API. Abstract This paper provides insights and interpretations regarding the use of API RP2A-WSD 22nd Edition. In , OTC paper # discussed.
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In the 9 th edition, issued indifferentiation was introduced in the allowable stress formulations for the joint and loading configuration i.
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Much further knowledge, including both editin data and numerical studies, has been gained on the behavior of joints since the API RP 2A 14 th Edition. In the 3rd edition of API RP2A, issued insome simple recommendations were introduced based on punching shear principles Marshall, Fatigue life correction factors for seawater, thickness, and use of weld profile control, grinding, and peening have also been introduced.
Also introduced in the 14 th Edition was the alternative nominal load approach, which gives equivalent results to the punching shear method Yura, No tubular joint revisions were made since then, until now.
Peer reviewed only Published between: Offshore Technology Conference Disciplines 4. Advanced closed form parametric formulations were developed xpi verified against these analytical results to reduce scatter and generate more reliable formulation than provided in the API RP 2A WSD 14 th through 21 st Editions.
The New API RP 2A, 22nd Edition Tubular Joint Design Practice – OnePetro
One significant feature of the new static design formulations is better representation of the chord load and geometry effects and the boundary conditions that are not possible with physical testing Pecknold01, 02, Karsan Paragon Engineering Services, Inc. The Task Group also evaluated and upgraded the tubular rdition fatigue design procedures. These models were then used to simulate a wide variety of geometries and static loading conditions, establishing a broader database than available test results.
SN curves and fatigue design requirements for cast nodes and grouted joints have also been introduced.
The University of Illinois at Urbana-Champaign, sponsored by API, developed nonlinear finite element models and verified them against available test results. Log in to your subscription Username. Rp2 static strength guidance then essentially remained unchanged editino all editions up to the 21st, although further recommendations were added on load transfer through the chord in the RPRA Edition 20 issued in Rock Mechanics Symposium and 5th U. Proceedings of an international conference Subsea Controls and Data Acquisition ‘ Sheriff’s Encyclopedic Dictionary of Applied Geophysics, fourth edition.
Rp2z of an international conference Oceanology: Proceedings of an international conference Diverless and Deepwater Techology: In the 14 th Edition, the punching shear stress formulations were considerably modified and included a more realistic expression to account for the effect of chord loads as well as providing an interaction equation for the combined effect of brace axial and bending stresses.