Experimental and numerical analyses of the ultimate compressive strength of perforated offshore tubular members

Abstract Tubular steel members are widely used as structural elements in offshore units. The strength capacity and design formulas for intact members, subject to axial compressive forces, have been thoroughly investigated. However, there are few studies on the behavior of perforated tubular members from offshore aged units and on their remaining load capacity assessment. Perforation damage leads to deterioration of strength capacity and life-time shortening of the structures. The aim of this paper is to present an experimental campaign and a numerical finite element model to obtain the ultimate strength of tubular structures with circular perforated damage subjected to axial compression. In the experimental program fifteen tubular scaled specimens are tested and results are compared with the ones from geometrical and material non-linear finite element model considering reconstructed geometries, variable thickness distribution and actual material stress-strain curves. Shell elements are used and the finite element meshes are obtained from detailed external wall 3D laser scanning of the experimental samples and ultrasonic thickness measurements in several cross-sections. Spatial thickness interpolation is performed to define the thickness in all meshed nodes. Results from numerical model analyses demonstrate considerable accuracy and good agreement with those directly measured from experimental perforated tubular member's samples in terms of axial load-displacement and strains. From the results, it has been concluded that the perforation size is the most important variable in determining the extent of the compressive strength degradation.

[1]  Shigeyuki Murakami,et al.  Experimental Study on Buckling Strength of the Perforated Cylindrical Steel Tubular Members , 1996 .

[2]  M. Yeh,et al.  Bending buckling of an elastoplastic cylindrical shell with a cutout , 1999 .

[3]  Christopher G. Relf,et al.  Image Acquisition and Processing with LabVIEW , 2003 .

[4]  Les A. Piegl,et al.  On NURBS: A Survey , 2004 .

[5]  Ali Limam,et al.  Effects of openings of the buckling of cylindrical shells subjected to axial compression , 1998 .

[6]  Pasquale Franciosa,et al.  A RE-CAE methodology for re-designing free shape objects interactively , 2009 .

[7]  Johann Arbocz,et al.  The effect of general imperfections on the buckling of cylindrical shells , 1968 .

[8]  R. Farouki,et al.  Voronoi diagram and medial axis algorithm for planar domains with curved boundaries I. Theoretical foundations , 1999 .

[9]  Paolo Cignoni,et al.  MeshLab: an Open-Source 3D Mesh Processing System , 2008, ERCIM News.

[10]  Charlie C. L. Wang,et al.  From laser-scanned data to feature human model: a system based on fuzzy logic concept , 2003, Comput. Aided Des..

[12]  Sang Hyo Kim,et al.  Residual compressive strength of inclined steel tubular members with local corrosion , 2016 .

[13]  W. M. Bruin,et al.  RESIDUAL STRENGTH ASSESSMENT AND REPAIR OF DAMAGED OFFSHORE TUBULARS , 1995 .

[14]  M. Zeinoddini,et al.  Ratcheting behaviour of corroded steel tubes under uniaxial cycling: An experimental investigation , 2015 .

[15]  Janez Kopac,et al.  RE (reverse engineering) as necessary phase by rapid product development , 2006 .

[16]  Johann Arbocz,et al.  Buckling of imperfect stiffened cylindrical shells under axial compression , 1971 .

[17]  Anath Fischer,et al.  Adaptive parameterization for reconstruction of 3D freeform objects from laser-scanned data , 1999, Proceedings. Seventh Pacific Conference on Computer Graphics and Applications (Cat. No.PR00293).

[18]  Bing Li,et al.  Surface reconstruction based on point cloud from laser scanning system , 2005 .

[19]  S. Katsura,et al.  A study on deterioration of strength and reliability of aged jacket structures , 2004, Oceans '04 MTS/IEEE Techno-Ocean '04 (IEEE Cat. No.04CH37600).

[20]  Farid Taheri,et al.  Numerical and experimental investigations of the response of aluminum cylinders with a cutout subject to axial compression , 2006 .

[21]  Jian Zhong Zhang,et al.  Point Cloud Process of Laser Scanning with a Mathematical Noise Model , 2013 .

[22]  Mohammad Reza Khedmati,et al.  A numerical investigation into strength and deformation characteristics of preloaded tubular members under lateral impact loads , 2012 .

[23]  L. D. Lutes,et al.  Assessing the compressive strength of corroded tubular members , 2001 .

[25]  W Hilburger Mark,et al.  Buckling Behavior of Compression-Loaded Quasi-Isotropic Curved Panels With a Circular Cutout , 1999 .

[26]  A.W.L. Yao,et al.  Applications of 3D scanning and reverse engineering techniques for quality control of quick response products , 2005 .

[27]  Rajesh Siddavatam,et al.  On NURBS algorithms and application: A survey , 2015, 2015 2nd International Conference on Computing for Sustainable Global Development (INDIACom).

[28]  Paolo Cignoni,et al.  Ieee Transactions on Visualization and Computer Graphics 1 Efficient and Flexible Sampling with Blue Noise Properties of Triangular Meshes , 2022 .

[29]  Azam Tafreshi,et al.  Buckling and post-buckling analysis of composite cylindrical shells with cutouts subjected to internal pressure and axial compression loads , 2002 .