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Visualization of Seismic Bridge Motions

by Robert Dowell

Dowell, Robert (2004). Visualization of Seismic Bridge Motions. SMIP04 Seminar on Utilization of Strong-Motion Data, p. 103 - 112.

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This paper discusses a new computer program for visualizing the animated measured response of bridge structures subjected to earthquakes. A graphical display allows the bridge to be viewed from any angle with any level of perspective and magnification to deformations. Panning and zooming are also available. Bridge behavior is measured at various locations on the structure as part to the Strong Motion Instrumentation Program. Between measured locations the bridge response is determined from spline functions consistent with structural behavior and boundary conditions. Time-history plots are also available which allow any quantity to be plotted against any other quantity, providing a powerful tool for visualizing data.