A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Changes of RC-beam modal parameters due to cracks
This paper deals with experimental modal analysis of RC-beam with the purpose of identifying modal parameter changes caused by three levels of cracking and subsequent strengthening by carbon fibre reinforced plastic laminate. The beam under investigation were T-shaped and 6.0 m total length. They were mounted so as to present both simply supported and cantilevered beam boundary conditions. Hammer impacts and random signals from a shaker were used as the excitation testing signals. The beam responses were recorded by a set of six accelerometers mounted on the beam. The cracks were introduced non-symmetrically into the beams. The measurements using the abovementioned excitation techniques followed after each level of beam cracking. Both boundary conditions, i.e. simply supported and cantilever beam were always employed. The first measurements were performed on the uncracked beam for both boundary conditions. The frequency range of the analysis was 0-500 Hz. The modal parameter changes corresponding to torsional modes as well as combinations of bending and torsional modes of the vibrating beams will be discussed.
Changes of RC-beam modal parameters due to cracks
This paper deals with experimental modal analysis of RC-beam with the purpose of identifying modal parameter changes caused by three levels of cracking and subsequent strengthening by carbon fibre reinforced plastic laminate. The beam under investigation were T-shaped and 6.0 m total length. They were mounted so as to present both simply supported and cantilevered beam boundary conditions. Hammer impacts and random signals from a shaker were used as the excitation testing signals. The beam responses were recorded by a set of six accelerometers mounted on the beam. The cracks were introduced non-symmetrically into the beams. The measurements using the abovementioned excitation techniques followed after each level of beam cracking. Both boundary conditions, i.e. simply supported and cantilever beam were always employed. The first measurements were performed on the uncracked beam for both boundary conditions. The frequency range of the analysis was 0-500 Hz. The modal parameter changes corresponding to torsional modes as well as combinations of bending and torsional modes of the vibrating beams will be discussed.
Changes of RC-beam modal parameters due to cracks
Veränderung der Modalparameter von Trägern aus verstärktem Beton durch Rißbildung
Slaston, J. (author) / Pietrzko, S. (author)
1993
7 Seiten, 15 Bilder, 3 Tabellen, 5 Quellen
Conference paper
English
| British Library Online Contents | 2019
Wavelet‐Based Detection of Beam Cracks Using Modal Shape and Frequency Measurements
| Online Contents | 2012
Effects of Bolted Connection on Beam Structural Modal Parameters
| Springer Verlag | 2013