doi: 10.7763/IJET.2012.V4.450
Evaluation Methods of Dynamic Response of RC Bridge to Spatially Varying Mining Shock
,
Maria Fabijańska-Kopacz
- the Civil Engineering Faculty, Cracow University of
Abstract
The paper presents the analysis of dynamic response of RC bridge to mining shock. Calculations of the dynamic response of the bridge were performed using three different methods. Initially, classical time history analysis were carried out with a model of uniform kinematic excitation (THA_U). In that method it is assumed that the velocity of wave propagation in the ground is infinite, so the excitation at all supports is identical. Then, a model of non-uniform kinematic excitation was introduced (THA_N). In that model wave passage along the bridge was taken into consideration. Finally, the response spectrum method (RSA) was used, which is most often incorporated because of the simplicity of calculation. Internal forces obtained with three methods were compared to assess the effect of non-uniformity of kinematic excitation on dynamic response of the bridge. It occurred that bending moments and shear forces obtained with the model of non-uniform excitation can exceed those obtained for with the model of uniform excitation. The comparative analysis also indicates that the response spectrum method may lead to non-conservative assessment of the dynamic response of the bridge.
Keywords
- Mining shocks. non-uniform kinematic excitation
- reinforced concrete bridges
- response spectrum analysis
How to Cite
Joanna M. Dulińska and Maria Fabijańska-Kopacz, "Evaluation Methods of Dynamic Response of RC Bridge to Spatially Varying Mining Shock," International Journal of Engineering and Technology, vol. 4, no. 5, pp. 638-641, 2012. https://doi.org/ 10.7763/IJET.2012.V4.450
Copyright & License
Copyright © 2012 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).