Civil Engineering Reference
In-Depth Information
a
b
2500
7
0%
1%
2%
3%
4%
5%
0%
1%
2%
3%
4%
5%
0%
6
2000
1%
5
1500
4
2%
3%
4%
5%
3
1000
2
500
1
0
0
0
10
20
30
40
50
60
70
0
1
2
3
4
5
6
7
8
Frequency (Hz)
Frequency (Hz)
Fig. 10.4
PSD of accelerations for vehicle travelling along path 2 at 20 m s
1
over a 15 m bridge; (
a
) Trailer axle 1 accelerations (
b
) Axle
acceleration difference
10.4 Conclusions
This paper investigates the feasibility of using an instrumented truck-trailer vehicle model to monitor damping in a bridge.
A method is presented that involves the subtraction of axle accelerations to remove much of the influence of the road profile.
The results indicate that bridge frequency and changes in damping can be detected when the axle accelerations of the trailer
are subtracted from one another. Results for the drive-by system are of similar quality to results for an accelerometer located
on the bridge and the algorithm appears to be insensitive to transverse position of the vehicle on the road.
Acknowledgements
The authors wish to express their gratitude for the financial support received from Science Foundation Ireland towards this
investigation under the US-Ireland Research Partnership Scheme.
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