Pushover analyses are increasingly being used by the offshore industry in the assessment, and design, of offshore structures. Traditionally, such analyses are conducted on the basis that the tubular joints are assumed to be rigid. Whereas special finite elements for capturing the buckling behaviour of beam-columns have been in existence for some years, there has been no comparative approach for dealing with tubular joints, that is until the work reported in this paper. The work was carried out under the aegis of a major international Joint Industry Project concerned with the development, testing and calibration of an efficient analysis tool that allows the non-linear behaviour of tubular joints within a space frame structure to be appropriately accounted for. Pushover analysis incorporating proper joint behaviour can now be efficiently conducted with minimal user intervention. The paper describes the algorithms that were developed to simulate the non-linear behaviour of tubular joints under combined axial, in-plane and out-of-plane moment loads, across the full range of the load-deformation response. The (uncoupled) P-δ and M-θ responses were first represented by powerful, yet simple, equations whose coefficients were established by reference to test data. Coupling, for combined loads, was achieved by adapting plasticity theory algorithms. The interaction of chord loads on joint response and how the issue of joints having mixed K/X/Y classification is encompassed in the algorithms is addressed. Ductility limits and unloading behaviour are discussed. Finally, testing of the codified algorithms and calibration against frame test data are mentioned. The results demonstrate that frame response is more accurately captured when joint behaviour is taken into account.
Skip Nav Destination
ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering
June 23–28, 2002
Oslo, Norway
Conference Sponsors:
- Ocean, Offshore, and Arctic Engineering Division
ISBN:
0-7918-3613-4
PROCEEDINGS PAPER
A Non-Linear Tubular Joint Response Model for Pushover Analysis
Adrian F. Dier,
Adrian F. Dier
MSL Engineering, Ltd., Egham, Surrey, UK
Search for other works by this author on:
Oyvind Hellan
Oyvind Hellan
SINTEF, Trondheim, Norway
Search for other works by this author on:
Adrian F. Dier
MSL Engineering, Ltd., Egham, Surrey, UK
Oyvind Hellan
SINTEF, Trondheim, Norway
Paper No:
OMAE2002-28634, pp. 627-634; 8 pages
Published Online:
February 24, 2009
Citation
Dier, AF, & Hellan, O. "A Non-Linear Tubular Joint Response Model for Pushover Analysis." Proceedings of the ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 3. Oslo, Norway. June 23–28, 2002. pp. 627-634. ASME. https://doi.org/10.1115/OMAE2002-28634
Download citation file:
7
Views
Related Proceedings Papers
Related Articles
Investigations on Internally Ring-Stiffened Joints of Offshore Platforms
J. Offshore Mech. Arct. Eng (November,2000)
Finite-Element Modelling of Multi-Planar Offshore Tubular Joints
J. Offshore Mech. Arct. Eng (February,2004)
Related Chapters
LARGE STANDOFF MAGNETOMETRY TECHNOLOGY ADVANCES TO ASSESS PIPELINE INTEGRITY UNDER GEOHAZARD CONDITIONS AND APPROACHES TO UTILISATION OF IT
Pipeline Integrity Management Under Geohazard Conditions (PIMG)
Inspection-Based Life Extension of Offshore Jacket Fleets
Ageing and Life Extension of Offshore Facilities
Subsection NB—Class 1 Components
Companion Guide to the ASME Boiler and Pressure Vessel Code, Volume 1, Third Edition