Multiplanar tubular KK-joints are one of the most popular joint types in offshore structures, which are exposed to cyclic loads and fatigue damages. In this paper, a fatigue prediction method based on scaled model test is proposed. First, a scaled KK-joint, including deviations for model simplification, was designed based on sensitive analysis and similarity analysis. Then, static and fatigue tests on the scaled model under axial loading were performed, by which hot spot stress (HSS) distributions and the maximum HSS were recorded. From the test, the fatigue crack initiates from the location of the maximum HSS and propagates along the weld toe. Finally, the maximum HSS of original KK-joint was deduced by finite element analysis (FEA), and then, the fatigue life was predicted accordingly and compared with the rule-based result.
Issue Section:
Structures and Safety Reliability
References
1.
Lee
, M. M. K.
, 1999
, “Strength, Stress and Fracture Analyses of Offshore Tubular Joints Using Finite Elements
,” J. Constr. Steel Res.
, 51
(3
), pp. 265
–286
.2.
ABS
, 2003
, Fatigue Assessment of Offshore Structure
, American Bureau of Shipping
, Washington, DC
.3.
DNV
, 2010
, Fatigue Design of Offshore Steel Structures
, Det Norske Veritas
, Oslo, Norway
.4.
Karamanos
, S. A.
, Romeijn
, A.
, and Wardenier
, J.
, 2002
, “SCF Equations in Multi-Planar Welded Tubular DT-Joints Including Bending Effects
,” Mar. Struct.
, 15
(2
), pp. 157
–173
.5.
N'diaye
, A.
, Hariri
, S.
, Pluvinage
, G.
, and Azari
, Z.
, 2009
, “Stress Concentration Factor Analysis for Welded, Notched Tubular T-Joints Under Combined Axial, Bending and Dynamic Loading
,” Int. J. Fatigue
, 31
(2
), pp. 367
–374
.6.
Shao
, Y.
, Zhi
, F.
, and Seng
, T.
, 2009
, “Prediction of Hot Spot Stress Distribution for Tubular K-Joints Under Basic Loadings
,” J. Constr. Steel Res.
, 65
(10–11
), pp. 2011
–2026
.7.
Woghiren
, C. O.
, and Brennan
, F. P.
, 2009
, “Weld Toe Stress Concentrations in Multi-Planar Stiffened Tubular KK Joints
,” Int. J. Fatigue
, 31
(1
), pp. 164
–172
.8.
Hoon
, K.
, Wong
, L.
, and Soh
, A.
, 2001
, “Experimental Investigation of a Double-Plate Reinforced Tubular T-Joint Subjected to Combined Loadings
,” J. Constr. Steel Res.
,” 57
(9
), pp. 1015
–1039
.9.
Chen
, J.
, Chen
, J.
, and Jin
, W.
, 2010
, “Experiment Investigation of Stress Concentration Factor of Concrete-Filled Tubular T Joints
,” J. Constr. Steel Res.
, 66
(12
), pp. 1510
–1515
.10.
Qian
, X.
, Jitpairod
, K.
, Marshall
, P.
, Swaddiwudhipong
, S.
, Ou
, Z.
, Zhang
, Y.
, and Pradana
, M. R.
, 2014
, “Fatigue and Residual Strength of Concrete-Filled Tubular x-Joints With Full Capacity Welds
,” J. Constr. Steel Res.
, 100
(13
), pp. 21
–35
.11.
Qian
, X.
, Petchdemaneengam
, Y.
, Swaddiwudhipong
, S.
, Marshall
, P.
, Ou
, Z.
, and Nguyen
, C. T.
, 2013
, “Fatigue Performance of Tubular x-Joints With PJP Welds: I—Experimental Study
,” J. Constr. Steel Res.
, 2013
(90
), pp. 49
–59
.12.
Chen
, Y.
, Tong
, Z.
, Hua
, H.
, Wang
, Y.
, and Gou
, H.
, 2009
, “Experimental Investigation on the Dynamic Response of Scaled Ship Model With Rubber Sandwich Coatings Subjected to Underwater Explosion
,” Int. J. Impact Eng.
, 36
(2
), pp. 318
–328
.13.
Gordo
, J. M.
, and Soares
, C. G.
, 2015
, “Experimental Evaluation of the Ultimate Bending Moment of a Slender Thin-Walled Box Girder
,” ASME J. Offshore Mech. Arct. Eng.
, 137
(2
), p. 021604
.14.
Elshafey
, A. A.
, Haddara
, M. R.
, and Marzouk
, H.
, 2009
, “Dynamic Response of Offshore Jacket Structures Under Random Loads
,” Mar. Struct.
, 22
(3
), pp. 504
–521
.15.
Sakai
, Y.
, Hosaka
, T.
, Isoe
, A.
, Ichikawa
, A.
, and Mitsuki
, K.
, 2004
, “Experiments on Concrete Filled and Reinforced Tubular k-Joints of Truss Girder
,” J. Constr. Steel Res.
, 60
(3
), pp. 683
–699
.16.
Schumacher
, A.
, Borges
, L. C.
, and Nussbaumer
, A.
, 2009
, “A Critical Examination of the Size Effect Correction for Welded Steel Tubular Joints
,” Int. J. Fatigue
, 31
(8
), pp. 1422
–1433
.17.
Schuring
, D. J.
, 1977
, “Scale Models in Engineering
,” J. INCE/Jpn.
, 3
, pp. 21
–26
.18.
Madenci
, E.
, and Guven
, I.
, 2007
, The Finite Element Method and Applications in Engineering Using ansys®
, Springer
, Berlin
.19.
API
, 1993
, Recommended Practice for Planning, Designing and Constructing Fixed Offshore Platforms Load and Resistance Factor Design
, American Petroleum Institute
, Washington, DC
.20.
AWS
, 1996
, Structural Welding Code-Steel
, American Welding Society
, Miami, FL
.21.
Wylde
, J. G.
, and Nald
, A.
, 1980
, “The Influence of Joint Dimensions on the Fatigue Strength of Welded Tubular Joints
,” Int. J. Fatigue
, 2
(1
), pp. 31
–36
.Copyright © 2016 by ASME
You do not currently have access to this content.
