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Steel and Composite Structures Volume 11, Number 1, February 2011, pages 21-38 DOI: http://dx.doi.org/10.12989/scs.2011.11.1.021 |
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Parameters influencing seismic response of horizontally curved, steel, I-girder bridges |
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Daniel G. Linzell and Venkata P. Nadakuditi
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| Abstract | ||
| This study examines the influence of curved, steel, I-girder bridge configuration on girder end reactions and cross frame member forces during seismic events. Simply-supported bridge finite element models were created and examined under seismic events mimicking what could be experienced in AASHTO Seismic Zone 2. Bridges were analyzed using practical ranges of: radius of curvature; girder and cross frame spacings; and lateral bracing configuration. Results from the study indicated that: (1) radius of curvature had the greatest influence on seismic response; (2) interior (lowest radius) girder reactions were heavily influenced by parameter variations and, in certain instances, uplift at their bearings could be a concern; (3) vertical excitation more heavily influenced bearing and cross frame seismic response; and (4) lateral bracing helped reduce seismic effects but using bracing along the entire span did not provide additional benefit over placing bracing only in bays adjacent to the supports. | ||
| Key Words | ||
| Horizontally; curved, steel; I-girder; bridge; seismic; finite; element. | ||
| Address | ||
| Daniel G. Linzell : Department of Civil and Environmental Engineering, The Pennsylvania State University, 231L Sackett Bldg., University Park, PA 16802, USA Venkata P. Nadakuditi : Stress Offshore, Inc., 13602 Westland East Blvd, Building 1, Houston, TX 77041 | ||