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A Study on FE Modeling Techniques of Steel Plate Girder Bridge with Composite Section for the Dynamic Analysis  

Heo, Gwang-Hee (건양대학교 토목시스템공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.10, no.1, 2006 , pp. 139-148 More about this Journal
Abstract
The dynamic characteristics of a bridge deduced by using the modeling techniques depend on its stiffness and mass calculated from its geometric model. This research develops the FE modeling techniques for a steel plate girder bridge with composite section. and proves their validity by comparing the results with those from actual measurement. The FE modeling techniques are divided into two categories--a simplified one and two-dimensional model and a detailed three-dimensional model. In the meantime, the dynamic responses of the bridge tested for this research were measured by the ambient vibration some of accelerometers were been attached to its upper slab girder under normal traffic load. The Cross Power Spectrum obtained from the measurement was used to analyze the dynamic characteristics by natural excitation techniques. The analytic results are compared to those of each FE modeling, and thereby the modeling techniques were proved to be valid.
Keywords
Ambient Vibration; Detailed Model; Simplified Model; Dynamic Measurement;
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