Civil Engineering Reference
In-Depth Information
Fig. 3.5
(
a
,
b
) Part of the bridge drawing with tuned mass dampers; (
c
) tuned mass damper for horizontal direction; (
d
) tuned mass damper for
vertical direction
Table 3.5
Values of the calculated and measured frequencies
Shape
f - numerics [Hz]
Mode shape
f - experiment I [Hz]
f - experiment II [Hz]
1
1.10
Torsion and horizontal bending
1.17
1.05
2
1.63
Vertical bending
1.72
1.53
Table 3.6
Values of the acceleration of the response
Limits [
4
]
Measurement I
Measurement II
a [m/s
2
]
a [m/s
2
]
a [m/s
2
]
Load description
Wind horizontal
0.2
0.08
0.01
Wind vertical
0.7
0.20
0.03
Two pedestrians crossing - horizontal
0.2
0.03
0.04
Two pedestrians crossing - vertical
0.7
0.50
0.05
Four pedestrians crossing - horizontal
0.2
0.08
0.05
Four pedestrians crossing - vertical
0.7
0.95
0.08
Crossing 2 + 2 pedestrians - horizontal
0.2
0.06
-
Crossing 2 + 2 pedestrians - vertical
0.7
1.81
0.10
Group crossing (seven persons) - horizontal
0.2
0.16
0.06
Group crossing (seven persons) - vertical
0.7
2.96
0.10
