Experience with Structural Damage Identification of an Experimental Bridge Model

Abstract:

The paper is devoted to structural health monitoring using a non-destructive method based on the method of direct stiffness determination combined with the model updating method. The primary aim of the paper is to determine the change in bending and torsional stiffnesses. In the first part of the work it was necessary to prepare a simple experimental scale model of the bridge which was made from two materials – wood and plaster boards. The same bridge model was created in the finite element commercial codes RFEM5 - Dlubal (a more detailed 3D analysis) and ANSYS (a 2D analysis). The last numerical model consists of beam elements with lumped mass elements. The modal analysis was made and these results were used as a comparative base for measurements. In either case data for the original and the damaged models were acquired. Analysis of the measurement data led to the identification of vertical and torsional mode shapes. Last part of the paper is devoted to identification of the damage by application of the direct stiffness calculation method.

• Periodical: Applied Mechanics and Materials (Volume 769)
• Pages: 192-199
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.769.192
• Online since: June 2015
• Authors: Milan Sokol, Rudolf Aroch, Michal Venglar*, Michal Fabry, Tomáš Živner
• Keywords: Direct Stiffness Calculation Method, Dynamics, Experimental Model of Bridge, Modal Analysis, System Identification

References

[1] J. Maeck, G. De Roeck, Dynamic bending and torsion stiffness derivation from modal curvatures and torsion rates, in: Journal of Sound & Vibration 225(1), August 1999, pp.153-170.

DOI: 10.1006/jsvi.1999.2228

[2] J. Maeck, G. De Roeck, B. Peeters, Dynamic Monitoring of Civil Engineering Structures, ISASR-NTUA, Athens, (2000).

[3] J. Maeck, G. De Roeck, Detection of damage in civil engineering structures by direct stiffness derivation, in: Eurodyn '99 : 4th European Conference of Structural Dynamics, Prague, June 1999. pp.485-490.

[4] H. Wenzel, Health Monitoring of Bridges, John Wiley & Sons Ltd, Chichester, (2009).

[5] M. Sokol, R. Flesch, Assessment of Soil Stiffness Properties by Dynamic Tests on Bridges, in: Journal of Bridge Engineering Vol. 10, No. 1, 2005, pp.77-86.

DOI: 10.1061/(asce)1084-0702(2005)10:1(77)

[6] R. Flesch, M. Sokol, Advanced methods for assessing the seismic vunerability of existing motorway bridges, Arsenal, OPFZ Arsenal Ges. m. b. h, Austria, (1999).