Download IMDPlus User Manual

Worked Example: Train Induced Vibration of a Bridge
Previously we have investigated the displacement and acceleration response of the midspan of the bridge deck for a single train speed. We will now look at the peak positive
and negative vertical displacement and acceleration responses of the mid-span over the
speed range of 15 m/s to 70 m/s as specified previously in the moving load analysis
control dialog.
 On the IMDPlus
Output
Control
dialog
select
Displacement results
of DZ for the vertical
component only.
 Deselect
Response
history option
the
time
 Select
the
Peak
response summary
option and select
Positive/negative
 Click the Apply
button to proceed.
The IMDPlus analysis will now run and warning messages will be seen to appear from
time to time in the text output window.
 When prompted about the warnings click the No button since these are the same
oversample warnings as seen previously.
102