NDLI: On SIF and SCF of Circumferential Welds on Steel Tubular Piles Under Bending Moments

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Li, Yi Wang, Duo-Yin Zhou, Shi-Liang
Copyright Year	2010
Abstract	Circumferential welds, also called splice welds, on steel piles installed in marine and offshore structures are potential fatigue hot spots, given harsh and cyclic loadings. This paper is devoted to linear elastic fracture mechanics (LEFM)-based fatigue assessment for pile splice welds under bending moments. Specifically, this paper studies two important factors for the LEFM analysis of surface crack at the circumferential welds, stress intensity factor (SIF) and stress concentration factor (SCF). So far, LEFM-based fatigue assessment has not been widely conducted for steel tubular piles. Particularly, the two factors have not been properly developed with regard to typical features of marine steel piles, i.e., small aspect ratio of crack shape, thin-walled condition, misalignments at splice, thickness transition, complicated loading effects including bending moments, etc. The determination of SIF heavily relies on a geometry function for the growth of a fatigue crack. Based on a literature review, this paper has identified a database of geometry functions that may be suitable in practice for the circumferential welds on tubular piles with a thickness ratio around 10 under bending moments. SCF is used to accommodate stress concentration effects due to assorted geometric misalignments at a pile splice, including diameter difference (or concentricity), center eccentricity, thickness difference, and out of roundness. Currently, SCFs for tubular connections are produced for axial forces. In this paper, a practical approximation to the SCF under bending moments is mathematically formulated on the basis of a flat-plate configuration. This paper presents practical information for LEFM-based fatigue assessment of steel piles installed in marine and offshore works.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	621
Ending Page	627
Page Count	7
File Format	PDF
ISBN	9780791849101
DOI	10.1115/OMAE2010-20842
e-ISBN	9780791838730
Volume Number	29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 2
Conference Proceedings	ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2010-06-06
Publisher Place	Shanghai, China
Access Restriction	Subscribed
Subject Keyword	Splice Marine structures Steel piles Fatigue Fracture Weld Crack Welded joints Fracture (materials) Steel
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in