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http://dx.doi.org/10.12989/sem.2009.33.3.325

Damage detection in jacket type offshore platforms using modal strain energy  

Asgarian, B. (K.N. Toosi University of Technology, Civil Engineering Department)
Amiri, M. (K.N. Toosi University of Technology, Civil Engineering Department)
Ghafooripour, A. (Islamic Azad University, Tehran Central Branch)
Publication Information
Structural Engineering and Mechanics / v.33, no.3, 2009 , pp. 325-337 More about this Journal
Abstract
Structural damage detection, damage localization and severity estimation of jacket platforms, based on calculating modal strain energy is presented in this paper. In the structure, damage often causes a loss of stiffness in some elements, so modal parameters; mode shapes and natural frequencies, in the damaged structure are different from the undamaged state. Geometrical location of damage is detected by computing modal strain energy change ratio (MSECR) for each structural element, which elements with higher MSECR are suspected to be damaged. For each suspected damaged element, by computing cross-modal strain energy (CMSE), damage severity as the stiffness reduction factor -that represented the ratios between the element stiffness changes to the undamaged element stiffness- is estimated. Numerical studies are demonstrated for a three dimensional, single bay, four stories frame of the existing jacket platform, based on the synthetic data that generated from finite element model. It is observed that this method can be used for damage detection of this kind of structures.
Keywords
damage detection; modal analysis; strain energy; jacket platforms;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 0  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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1 Barroso, L.R. and Rodriguez, R. (2004), 'Damage detection utilizing the damage index method to a benchmark structure', J. Eng. Mech., 130(2), 142-151   DOI   ScienceOn
2 Brown, A.J. (2002), 'Modeling structural damage in ship collisions', Ship Structure Committee Report, SSC-422
3 Choi, S., Park, S. and Stubbs, N. (2005), 'Nondestructive damage detection in structures using changes in compliance', Int. J. Solids. Struct, 42, 4494-4513   DOI   ScienceOn
4 Doebling, S.W., Farrar, C.R., Prime, M.B. and Shevitz, D.W. (1998), 'A summary review of damage identification methods that examine changes in dynamic properties', J. Shock Vib. Dig., 30(2), 91-105   DOI   ScienceOn
5 Escobar, J.A., Sosa, J.J. and Gomez, R. (2005), 'Structural damage detection using the transformation matrix', J. Comput. Struct., 83, 357-368   DOI   ScienceOn
6 Gandhi, P., Ramachandra Murthy, D.S., Raghava, G. and Madhava Rao, A.G. (2000), 'Fatigue crack growth in stiffened steel tubular joints in seawater environment', J. Struct. Eng., 22, 1390-1401   DOI   ScienceOn
7 Grewal, G.S. and Lee, M.K. (2004), 'Strength of minimum structure platforms under ship impact', J. Offshore. Mech. Arct. Eng., 126(4), 368-375   DOI   ScienceOn
8 Hu, S.J., Wang, S. and Li, H. (2006), 'Cross-modal strain energy method for estimating damage severity', J. Eng. Mech., 132(4), 429-437   DOI   ScienceOn
9 Huynh, D., He, J. and Tran, D. (2005), 'Damage location vector: A non-destructive structural damage detection technique', J. Comput. Struct., 83, 2353-2367   DOI   ScienceOn
10 Kim, J.T. and Stubbs, N. (1995), 'Damage detection in offshore jacket structures from limited modal nformation', Int. J. Offshore. Polar. Eng., 5(1)
11 Koh, C.G., See, L.M. and Balendra, T. (1995), 'Damage detection of buildings: Numerical and experimental studies', J. Struct. Eng., 121(8), 1155-1160   DOI   ScienceOn
12 Kosmatka, J.B. and Ricles, J.M. (1999), 'Damage detection in structures by modal vibration characterization', J. Struct. Eng., 125(12), 1384-1392   DOI   ScienceOn
13 Lam, H.F.P. (1994), 'Detection of damage location based on sensitivity & experimental modal analysis', M.Phil.Thesis, Civ. and Struct. Eng. Dept., Hong Kong Polytechnic University, Kowloon, Hong Kong
14 Law, S.S., Shi, Z.Y. and Zhang, L.M. (1998), 'Structural damage detection from incomplete and noisy modal test data', J. Eng. Mech., 124(11), 1280-1288   DOI   ScienceOn
15 Liu, P.L. (1995), 'Identification and damage detection of trusses using modal data', J. Struct. Eng., 121(4), 599-608   DOI   ScienceOn
16 Mangal, L., Idichandy, V.G. and Ganapathy, C. (1999), 'Structural monitoring of offshore platforms using impulse and relaxation response', J. Ocean. Eng., 28, 689-705   DOI   ScienceOn
17 Mazzoni, S., McKenna, F., Scott, M. and Fenves, G. (2006), OPENSEES Command Language Manual, 19th July
18 Park, S., Kim, Y.B. and Stubbs, N. (2002), 'Nondestructive damage detection in large structures via vibration monitoring', EJSE Int., 2
19 Moan, T., Karsan, D. and Wilson, T. (1993), 'Analytical risk assessment and risk control of floating platforms subjected to ship collisions and dropped objects', No. OTC 7123, Proceeding of 25th Offshore Technology Conference, 407-418, Houston   DOI
20 Mortazavi, M. and Bea, R.G. (1996), 'Screening methodologies for use in platform assessments & requalifications', Marine Technology & Management Group Project, Department of Civil Engineering, University Of California, Berkeley, USA
21 Pothisiri, T. and Hjelmstad, K.D. (2003), 'Structural damage detection and assessment from modal response', J. Eng. Mech., 129(2), 135-145   DOI   ScienceOn
22 Shi, Z.Y., Law, S.S. and Zhang, L.M. (2000), 'Structural damage detection from modal strain energy change', J. Eng. Mech., 126(12), 1216-1223   DOI   ScienceOn
23 Shi, Z.Y., Law, S.S. and Zhang, L.M. (2002), 'Improved damage quantification from elemental modal strain energy change', J. Eng. Mech., 128(5), 521-529   DOI   ScienceOn
24 Sterndorff, M.J., Waegter, J. and Eilersen, C. (1992), 'Design of fixed offshore platforms to dynamic ship impact loads', J. Offshore. Mech. Arct. Eng., 114(3), 146-153   DOI
25 Udwadia, F.E. (2005), 'Structural identification and damage detection from noisy modal data', J. Aerospace. Eng., 18(3), 179-187   DOI   ScienceOn
26 Vestroni, F. and Capecchi, D. (2000), 'Damage detection in beam structures based on frequency measurements', J. Eng. Mech., 126(7), 761-768   DOI   ScienceOn
27 Xiang, S., Hua-jun, H., Yong-chun, Y. and Chen, G. (2008), 'A model experiment of damage detection for offshore jacket platforms based on partial measurement', Struct. Eng. Mech., 29(3), 311-325   ScienceOn