Quarterly Report of RTRI
Online ISSN : 1880-1765
Print ISSN : 0033-9008
ISSN-L : 0033-9008
PAPERS
Impact Factors of Concrete Girders Coping with Train Speed-up
Masamichi SOGABENobuyuki MATSUMOTOMakoto KANAMORITsutomu SATOHajime WAKUI
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2005 Volume 46 Issue 1 Pages 46-52

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Abstract

The dynamic response of railway bridges is a problem of the resonant response of girders that occurs because bridges are excited at a constant period by running trains. In general, this is referred to as "the speed effect of multiple-axle moving loads." In this study, vehicle running tests were performed to examine 56 bridges of various structural types and span lengths. The impact factor was measured to be about 1.0 on four girders, and the damping ratio as low as 0.02. Based on the results of these running tests and numerical analysis, a revision of the railway design standard was proposed, to cope with the speed-up of trains.

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© 2005 by Railway Technical Research Institute
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