Filtern
Erscheinungsjahr
Dokumenttyp
- Posterpräsentation (13) (entfernen)
Referierte Publikation
- nein (13)
Schlagworte
- Achsfolgespektren (1)
- Axle-sequence (1)
- Bauteile (1)
- Bauwerke (1)
- Brücken (1)
- Ground vibration (1)
- Layered soil (1)
- Modalanalyse (1)
- Railway track (1)
- Sleeper passage (1)
Organisationseinheit der BAM
- 7 Bauwerkssicherheit (1)
- 7.2 Ingenieurbau (1)
Dynamische Baugrunderkundung
(2005)
Vergleichsrechnungen zur Dynamik des Eisenbahngleises: Amplitudenverteilung und Untergrundeinfluss
(2001)
The dynamic compliance of different railway tracks on different layered soils have been calculated using a combined finite-element and boundary-element method:
conventional track on homogeneous soil with different stiffness,
extreme normal and inverse layering of the soil,
plates in and on top of the soil (slab track on various soils),
conventional track with elastic rail pads.
In the last three decades, the vibrations of many floors and bridges have been measured. The contribution shows some evaluation methods, experimental results and some modelling and theoretical results. Simple evaluation methods have been developed for single and coupled floors. Two coupled beams have been measured in good agreement with the theory. A more complex coupling model has been found for a large wooden floor in a castle consisting of six floor bays which correlates well with the measurements. Damaged and intact poles have been tested by their natural frequencies and damping values, and a fair correlation between the degree of damage and the shift of the frequency. Road bridges have been analysed in detail and some examples are presented. Railway bridges and trains are studied for resonant excitation. The risk of resonance can be estimated in frequency domain by using axle-sequence spectra of the train and the natural frequencies of the bridge. A measurement example shows the amplification, but even stronger the cancellation of the subsequent axle responses. Several high-speed trains and freight trains have been analysed for their potential resonance amplification.