Strain as Damage Indicator for Truss and Frame Structures

Abstract:

Damage detection techniques are becoming more and more important issues for prolonging the lifetime of the old structures. In the paper the strain measurements on offshore oil platform leg model as well as the preliminary measurement system installed on jack-up rig is presented. During experiments performed on frame model of the platform leg different types of damage scenarios were tested. The Fiber Bragg Grating (FBG) strain sensors were capable to detect damage. After laboratory experiments, preliminary FBG system was installed on the real construction (jack-up rig) excited by environmental and operation-induced forces. It is evident that strain measurement based on FBG technology is very promising technique for use in truss/frame structures.

• Periodical: Key Engineering Materials (Volume 558)
• Pages: 99-106
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.558.99
• Online since: June 2013
• Authors: Szymon Opoka, Lech Murawski, Tomasz Wandowski, Pawel Malinowski, Wieslaw Ostachowicz
• Keywords: Damage Detection, FBG Sensors, Frame, Jack-Up Rig, Strain

References

[1] Y. Gao, B. F. Spencer, Jr. Structural Health Monitoring Strategies for Smart Sensor Networks, NSEL Report Series, Report No. NSEL–011, May 2008.

[2] B Lee, 'Review of the present status of optical fiber sensors', Opt. Fiber Technol. 9 (2003), 57–79.

[3] M Majumder, T K Gangopadhyay, A K Chakraborty, K Dasgupta, D K Bhattacharya, Fibre Bragg gratings in structural health monitoring – Present status and applications, Sensors and Actuators A, 147 (2008), 150–164.

DOI: 10.1016/j.sna.2008.04.008

[4] L Ren, H N Li, J Zhou, D S Li, L Sun, 'Health monitoring system for offshore platform with fiber Bragg grating sensors', Opt. Eng. 45 (2006), 352–361.

DOI: 10.1117/1.2335858

[5] S W Doebling, C R Farrar, M B Prime, D W Shevitz, 'Damage Identification and Health Monitoring of Structural and Mechanical Systems from Changes in Their Vibration Characteristics: A Literature Review', Los Alamos National Laboratory Report, LA–13070–MS, 1996.

DOI: 10.2172/249299

[6] H Sohn, C R Farrar, F M Hemez, J J Czarnecki, D D Shunk, D W Stinemates, B R Nadler, 'A Review of Structural Health Monitoring Literature: 1996–2001', Los Alamos National Laboratory Report, LA–13976–MS, 2003.

[7] C R Farrar, K Worden, M D Todd, G Park, J Nichols, D E Adams, M T Bemet, K Farinholt, 'Nonlinear System Identification for Damage Detection', Los Alamos National Laboratory Report, LA–14353, 2007.

DOI: 10.2172/922532

[8] L. Murawski, W. Ostachowicz, S. Opoka, M. Mieloszyk, K. Majewska, Practical application of monitoring system based on optical sensors for marine constructions, Key Engineering Materials 518 (2012), 261–270.

DOI: 10.4028/www.scientific.net/kem.518.261