NATURAL FREQUENCY OF RAILWAY GIRDER BRIDGES UNDER VEHICLE LOADS

To investigate the natural frequency of a railway girder bridge under vehicle loads, two methods are presented. First, the natural frequency of a railway girder bridge under vehicle loads is obtained by solution of the eigenvalue of the vehicle-bridge interaction equation at each step of the numerical integration. Second, based on the vehicle-bridge interaction equation, an approximate formula is developed. The results show that the natural frequency of a railway girder bridge under vehicle loads varies periodically as the vehicles pass over the bridge. The results obtained with the two methods are then compared, showing that a good agreement is achieved. From parametric studies, the effects of the unsprung mass, the sprung mass, and the stiffness of the vehicle suspension are discussed.

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  • English

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  • Accession Number: 00960740
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 3 2003 12:00AM