Geometrical Parametric Study and Development of Design Formulae for the SCF Distribution Along the Weld Toe in Multi-Planar CHS DKT-Connections of Offshore Structures

Paper

Lotfollahi-Yaghin, Mohammad Ali, Ahmadi, Hamid and Shahverdi, Sajad. 2011. "Geometrical Parametric Study and Development of Design Formulae for the SCF Distribution Along the Weld Toe in Multi-Planar CHS DKT-Connections of Offshore Structures ." ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. Rotterdam, The Netherlands 19 - 24 Jun 2011 American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2011-49121

Paper/Presentation Title	Geometrical Parametric Study and Development of Design Formulae for the SCF Distribution Along the Weld Toe in Multi-Planar CHS DKT-Connections of Offshore Structures
Presentation Type	Paper
Authors	Lotfollahi-Yaghin, Mohammad Ali, Ahmadi, Hamid and Shahverdi, Sajad
Journal or Proceedings Title	Proceedings of the ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
Journal Citation	2, pp. 83-91
Article Number	49121
Number of Pages	9
Year	2011
Publisher	American Society of Mechanical Engineers (ASME)
ISBN	9780791844342
Digital Object Identifier (DOI)	https://doi.org/10.1115/OMAE2011-49121
Web Address (URL) of Paper	https://asmedigitalcollection.asme.org/OMAE/proceedings-abstract/OMAE2011/83/341492
Web Address (URL) of Conference Proceedings	https://asmedigitalcollection.asme.org/OMAE/OMAE2011/volume/44342
Conference/Event	ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
Event Details	ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering Parent ASME International Conference on Ocean, Offshore and Arctic Engineering Delivery In person Event Date 19 to end of 24 Jun 2011 Event Location Rotterdam, The Netherlands
Abstract	In the present paper, effects of geometrical parameters on the SCF distribution along the weld toe of multi-planar tubular DKT-joints under the axial loads are investigated. In order to study the multi-planar effect, SCF distribution in multi-planar joints is compared with the distribution in a uni-planar joint having the same geometrical properties. Based on the multi-planar DKT-joint FE models which are verified against experimental results and the predictions of Lloyd’s Register (LR) equations, a complete set of SCF database is constructed. The FE models cover a wide range of geometrical parameters. Through nonlinear regression analysis, a new set of SCF parametric equations is established for the accurate and reliable fatigue design of multi-planar DKT-joints under axial loads. An assessment study of these equations is conducted against the experimental data and the acceptance criteria recommended by the UK DoE.
Keywords	Acceptance criteria; Databases; Experimental design; Offshore structures
ANZSRC Field of Research 2020	401504. Ship and platform structures (incl. maritime hydrodynamics)
	400510. Structural engineering
Public Notes	Files associated with this item cannot be displayed due to copyright restrictions.
Byline Affiliations	University of Tabriz, Iran

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Static strength of offshore tubular T/Y-joints reinforced with collar plate subjected to tensile brace loading

Nassiraei, Hossein, Lotfollahi-Yaghin, Mohammad Ali and Ahmadi, Hamid. 2016. "Static strength of offshore tubular T/Y-joints reinforced with collar plate subjected to tensile brace loading." Thin-Walled Structures. 103, pp. 141-156. https://doi.org/10.1016/j.tws.2016.02.010

Parametric Study on the Effects of Pile Inclination Angle on the Response of Batter Piles in Offshore Jacket Platforms

Aminfar, Ali, Ahmadi, Hamid and Aminfar, Mohammad Hossein. 2016. "Parametric Study on the Effects of Pile Inclination Angle on the Response of Batter Piles in Offshore Jacket Platforms." Journal of Marine Science and Application. 15, pp. 193-200. https://doi.org/10.1007/s11804-016-1355-9

Static strength of collar plate reinforced tubular T/Y-joints under brace compressive loading

Nassiraei, Hossein, Lotfollahi-Yaghin, Mohammad Ali and Ahmadi, Hamid. 2016. "Static strength of collar plate reinforced tubular T/Y-joints under brace compressive loading." Journal of Constructional Steel Research. 119, pp. 39-49. https://doi.org/10.1016/j.jcsr.2015.12.011

Probabilistic analysis of stress concentration factors in tubular KT-joints reinforced with internal ring stiffeners under in-plane bending loads

Ahmadi, Hamid, Yeganeh, Ali, Mohammadi, Amir Hossain and Zavvar, Esmaeil. 2016. "Probabilistic analysis of stress concentration factors in tubular KT-joints reinforced with internal ring stiffeners under in-plane bending loads." Thin-Walled Structures. 99, pp. 58-75. https://doi.org/10.1016/j.tws.2015.11.010

Comparing the geodetical and geotechnical methods in investigating the deformation of earthfill dams; A case study of Mahabad Earthfill Dam, Iran

Aminfar, M. H., Rastbud, A., Ahmadi, H. and Naseri, A.. 2016. "Comparing the geodetical and geotechnical methods in investigating the deformation of earthfill dams; A case study of Mahabad Earthfill Dam, Iran." Journal of Engineering Science and Technology. 11 (4), pp. 619-637.

Probability density functions of SCFs in internally ring-stiffened tubular KT-joints of offshore structures subjected to axial loading

Ahmadi, Hamid, Mohammadi, A. and Yeganeh, Ali. 2015. "Probability density functions of SCFs in internally ring-stiffened tubular KT-joints of offshore structures subjected to axial loading." Thin-Walled Structures. 94, pp. 485-499. https://doi.org/10.1016/j.tws.2015.05.012

Degree of bending (DoB) in tubular K-joints of offshore structures subjected to in-plane bending (IPB) loads: Study of geometrical effects and parametric formulation

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali and Asoodeh, Shadi. 2015. "Degree of bending (DoB) in tubular K-joints of offshore structures subjected to in-plane bending (IPB) loads: Study of geometrical effects and parametric formulation." Ocean Engineering. 102, pp. 105-116. https://doi.org/10.1016/j.oceaneng.2015.04.050

Stress concentration due to in-plane bending (IPB) loads in ring-stiffened tubular KT-joints of offshore structures: Parametric study and design formulation

Ahmadi, Hamid and Lotfollahi-Yaghin, Mohammad Ali. 2015. "Stress concentration due to in-plane bending (IPB) loads in ring-stiffened tubular KT-joints of offshore structures: Parametric study and design formulation." Applied Ocean Research. 51, pp. 54-66. https://doi.org/10.1016/j.apor.2015.02.009

Stress concentration factors induced by out-of-plane bending loads in ring-stiffened tubular KT-joints of jacket structures

Ahmadi, Hamid and Zavvar, Esmaeil. 2015. "Stress concentration factors induced by out-of-plane bending loads in ring-stiffened tubular KT-joints of jacket structures." Thin-Walled Structures. 91, pp. 82-95. https://doi.org/10.1016/j.tws.2015.02.011

Probabilistic analysis of stress intensity factor (SIF) and degree of bending (DoB) in axially loaded tubular K-joints of offshore structures

Ahmadi, Hamid and Ghaffari, Amirreza. 2015. "Probabilistic analysis of stress intensity factor (SIF) and degree of bending (DoB) in axially loaded tubular K-joints of offshore structures." Latin American Journal of Solids and Structures. 12 (11), pp. 2025-2044. https://doi.org/10.1590/1679-78251698

Probabilistic Assessment of Degree of Bending in Tubular X-Joints of Offshore Structures Subjected to Bending Loads

Ahmadi, Hamid and Ghaffari, Amirreza. 2015. "Probabilistic Assessment of Degree of Bending in Tubular X-Joints of Offshore Structures Subjected to Bending Loads." Advances in Civil Engineering. 2015, pp. 1-13. https://doi.org/10.1155/2015/518450

Chord-side SCF distribution of central brace in internally ring-stiffened tubular KT-joints: A geometrically parametric study

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali and Yong-Bo, Shao. 2013. "Chord-side SCF distribution of central brace in internally ring-stiffened tubular KT-joints: A geometrically parametric study." Thin-Walled Structures. 70, pp. 93-105. https://doi.org/10.1016/j.tws.2013.04.011

Effect of SCFs on S-N based fatigue reliability of multi-planar tubular DKT-joints of offshore jacket-type structures

Ahmadi, Hamid and Lotfollahi-Yaghin, Mohammad Ali. 2013. "Effect of SCFs on S-N based fatigue reliability of multi-planar tubular DKT-joints of offshore jacket-type structures." Ships and Offshore Structures. 8 (1), pp. 55-72. https://doi.org/10.1080/17445302.2011.627750

Parametric study and formulation of outer-brace geometric stress concentration factors in internally ring-stiffened tubular KT-joints of offshore structures

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali, Yong-Bo, Shao and Aminfar, Mohammad H.. 2012. "Parametric study and formulation of outer-brace geometric stress concentration factors in internally ring-stiffened tubular KT-joints of offshore structures." Applied Ocean Research. 38, pp. 74-91. https://doi.org/10.1016/j.apor.2012.07.004

The development of fatigue design formulas for the outer brace SCFs in offshore three-planar tubular KT-joints

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali and Aminfar, Mohammad H.. 2012. "The development of fatigue design formulas for the outer brace SCFs in offshore three-planar tubular KT-joints." Thin-Walled Structures. 58, pp. 67-78. https://doi.org/10.1016/j.tws.2012.04.011

Slamming induced dynamic response of a floating structure

Lotfollahi-Yaghin, Mohammad Ali, Rastgar, Mehdi and Ahmadi, Hamid. 2012. "Slamming induced dynamic response of a floating structure." Journal of Marine Science and Technology (Taiwan). 20 (2), pp. 201-209. https://doi.org/10.51400/2709-6998.1839

A probability distribution model for stress concentration factors in multi-planar tubular DKT-joints of steel offshore structures

Ahmadi, Hamid and Lotfollahi-Yaghin, Mohammad Ali. 2012. "A probability distribution model for stress concentration factors in multi-planar tubular DKT-joints of steel offshore structures." Applied Ocean Research. 34, pp. 21-32. https://doi.org/10.1016/j.apor.2011.11.002

Geometrically parametric study of central brace SCFs in offshore three-planar tubular KT-joints

Ahmadi, Hamid and Lotfollahi-Yaghin, Mohammad Ali. 2012. "Geometrically parametric study of central brace SCFs in offshore three-planar tubular KT-joints." Journal of Constructional Steel Research. 71, pp. 149-161. https://doi.org/10.1016/j.jcsr.2011.10.024

Effect of stress concentration factors on the structural integrity assessment of multi-planar offshore tubular DKT-joints based on the fracture mechanics fatigue reliability approach

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali and Aminfar, Mohammad H.. 2011. "Effect of stress concentration factors on the structural integrity assessment of multi-planar offshore tubular DKT-joints based on the fracture mechanics fatigue reliability approach." Ocean Engineering. 38 (17-18), pp. 1883-1893. https://doi.org/10.1016/j.oceaneng.2011.08.004

Distribution of weld toe stress concentration factors on the central brace in two-planar CHS DKT-connections of steel offshore structures

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali and Aminfar, Mohammad H.. 2011. "Distribution of weld toe stress concentration factors on the central brace in two-planar CHS DKT-connections of steel offshore structures." Thin-Walled Structures. 49 (10), pp. 1225-1236. https://doi.org/10.1016/j.tws.2011.06.001

Geometrical effect on SCF distribution in uni-planar tubular DKT-joints under axial loads

Ahmadi, Hamid, Lotfollahi-Yaghin, Mohammad Ali and Aminfar, Mohammad H.. 2011. "Geometrical effect on SCF distribution in uni-planar tubular DKT-joints under axial loads." Journal of Constructional Steel Research. 67 (8), pp. 1282-1291. https://doi.org/10.1016/j.jcsr.2011.03.011

Geometric stress distribution along the weld toe of the outer brace in two-planar tubular DKT-joints: Parametric study and deriving the SCF design equations

Lotfollahi-Yaghin, Mohammad Ali and Ahmadi, Hamid. 2011. "Geometric stress distribution along the weld toe of the outer brace in two-planar tubular DKT-joints: Parametric study and deriving the SCF design equations." Marine Structures. 24 (3), pp. 239-260. https://doi.org/10.1016/j.marstruc.2011.02.005

Effect of geometrical parameters on SCF distribution along the weld toe of tubular KT-joints under balanced axial loads

Lotfollahi-Yaghin, Mohammad Ali and Ahmadi, Hamid. 2010. "Effect of geometrical parameters on SCF distribution along the weld toe of tubular KT-joints under balanced axial loads." International Journal of Fatigue. 32 (4), pp. 703-719. https://doi.org/10.1016/j.ijfatigue.2009.10.008

Dynamic behaviour of damaged reinforced concrete beams and application of white noise analysis to crack detection

Lotfollahi-Yaghin, M.A., Shahinpar, R. and Ahmadi, H.. 2009. "Dynamic behaviour of damaged reinforced concrete beams and application of white noise analysis to crack detection." Journal of the South African Institution of Civil Engineering. 51 (2), pp. 2-10.

This item comprises data from the following sources: Web of Science