Publications
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Local bending stiffness identification of beams using simultaneous Fourier-series fitting and shearography Vrije Universiteit Brussel
In this paper, we present a novel method for the identification of the local bending stiffness of beams. We use shearography to capture measurements of vibrating beams, so the input data for the identification is the modal slope – the differential of the modal shape. The modal slope is fitted by two Fourier-series functions, one of which is derived from a thin-beam model. The local bending stiffness is identified as the one corresponding with ...
Assessment of bridges based on stiffness identification using modal bending lines Ghent University
All Engineering structures are subjected to time-dependent degradation processes. In order to allow for cost effective maintenance, it is necessary to be able to determine the current structural condition and reliability profile respectively and to extrapolate the acquired assessment indices into the future. Based on this information maintenance planning then can be optimized. At the moment still visual inspection is the tool of choice for the ...
Comparison of Shearography to Scanning Laser Vibrometry as Methods for Local Stiffness Identification of Beams Vrije Universiteit Brussel
Local stiffness of Euler-Bernoulli beams can be identified by dividing the bending moment of a deformed beam by the local curvature. Curvature and moment distributions can be derived from the modal shape of a beam vibrating at resonance. In this article, the modal shape of test beams is measured by both scanning laser vibrometry (SLV) and shearography. Shearography is an interferometric optical method that produces full-field displacement ...
An inverse method for local stiffness identification based on scanning laser measurements Ghent University
The basic principle of inverse methods for the identification of material model parameters is to compare measured observations on a test specimen in a given test setup with virtual observations computed with a numerical model of the test specimen. The unknown parameters in the numerical model are updated until the computed observations match the measurements. Many inverse methods have already been proposed for the identification of uniform ...
AIFIT : user orientated identification for infrastructure, application Ghent University
The project AIFT aims at methods resulting in simple identification and localization of local bending stiffness reductions in reinforced concrete bridges as significant help for detailed inspection. New approaches for bending stiffness reduction identification and localization based on directly measured influence lines of load reaction at the bearings are applied. Results of laboratory tests on two span reinforced concrete beams are presented ...
Reversal of aging-induced increases in aortic stiffness by targeting cytoskeletal protein-protein interfaces Ghent University
Background: The proximal aorta normally functions as a critical shock absorber that protects small downstream vessels from damage by pressure and flow pulsatility generated by the heart during systole. This shock absorber function is impaired with age because of aortic stiffening. Methods and Results: We examined the contribution of common genetic variation to aortic stiffness in humans by interrogating results from the AortaGen Consortium ...
Innovative One‐way Connections between I‐beams and CHS columns Hasselt University
Very good resistance against high axial forces and bending in all directions [1], lightweight structures [2], lesser requirement of fire protection materials [3] and excellent aesthetics have emphasized upon the encouraging potential offered by CHS columns and their advantages compared to equivalent H-sections. They have also proved to be the best shape for elements under wind-, water-or wave-loading scenarios [4]. Additionally, as filling the ...
A modal approach to identify fatigue damage in threaded connections of large scale tubular structures KU Leuven Ghent University
Tubular structural elements with diameters in the range from 200 mm to 1400 mm are widely used in onshore and off-shore constructions. Typical examples include (drilling) platforms, bridges, and pipelines. In most cases several tubular elements (made of steel) are combined by means of weld joints. The current welding procedures for high strength steel are very time-consuming and thus constitute an important part of the total construction cost. ...