Dynamic Responses Of A Steel Composite Bridge
Subjected To A Moving High Speed Train Load In
Comparison With A PSC Box Girder Bridge
Author(s)
S. Kim, H. Kim & J. Lee
Abstract
Dynamic responses of a high speed railroad steel composite bridge have been
investigated experimentally and compared with responses of a prestressed
concrete box girder bridge which is one of the most typical types in the Korean
high speed railroad. A two I-shaped steel composite girder bridge (1@40m) and
a prestressed concrete box girder bridge (2@40m) have same span length of 40m,
but one is simply supported and the other is continuous. Therefore, for direct
comparison, the fictitious steel composite continuous bridge (2@40m) was
numerically modeled based on a nominated design process. A set of
experimental tests were performed during the operation of KTX, and dynamic
responses (vertical accelerations and vertical displacements) were measured.
Measured responses show that the vertical displacements of tested bridges all
satisfy requirements for passenger comfort, but vertical acceleration responses
were also found to be very close to the limit value for traffic safety. It was found
that most of the excessive acceleration responses occurred when the passing
speed of the train is close to the critical speed which causes resonance.
Keywords: high speed railroad bridge, bridge-train interaction, moving load.
Keywords
high speed railroad bridge, bridge-train interaction, moving load.
Related Book
Other papers in this volume
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