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Interaction and Multiscale Mechanics Volume 3, Number 1, March 2010 , pages 39-54 DOI: https://doi.org/10.12989/imm.2010.3.1.039 |
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The influence of different support movements and heights of piers on the dynamic behavior of bridges. Part II: earthquake acting along the bridge axis |
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I.G. Raftoyiannis, T.G. Konstantakopoulos and G.T. Michaltsos
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| Abstract | ||
| In this paper, a simple approach is presented for studying the dynamic response of multi-span steel bridges supported by pylons of different heights, subjected to earthquake motions acting along the axis of the bridge with spatial variations. The analysis is carried out using the modal analysis technique, while the solution of the integral-differential equations derived is obtained using the successive approximations technique. It was found that the height of piers and the quality of the foundation soil can affect significantly the dynamical behavior of the bridges studied. Illustrative examples are presented to highlight the points of concern and useful conclusions are gathered. | ||
| Key Words | ||
| bridge dynamics; piers; earthquakes; axial motion. | ||
| Address | ||
| I.G. Raftoyiannis: Laboratory of Steel Structures, Department of Civil Engineering, National Technical University of Athens, 9 Iroon Polytechneiou St., Zografou Campus, Athens 15780, Greece T.G. Konstantakopoulos: Laboratory of Steel Structures, Department of Civil Engineering, National Technical University of Athens, 9 Iroon Polytechneiou St., Zografou Campus, Athens 15780, Greece G.T. Michaltsos: Laboratory of Steel Structures, Department of Civil Engineering, National Technical University of Athens, 9 Iroon Polytechneiou St., Zografou Campus, Athens 15780, Greece | ||
