Civil Engineering Reference
In-Depth Information
25
10
Rhythmic activities,
outdoor footbridges
5
Indoor footbridges,
shopping malls,
dining, and dancing
2.5
1
Oces,
residences
0.5
0.25
0.1
ISO baseline curve
for RMS acceleration
0.05
1
3
4
5 8
Frequency (Hz)
10
25
40
Figure 17.6
Recommended peak acceleration for human comfort for vibrations due
to human activities. (Data from Allen, D.E. and Murray, T.M.,
Engineering
Journal
, 4th Qtr, AISC, 117-129, 1993; Murray, T.M., Allen, D.E., and Ungar,
E.E., “Floor Vibrations due to Human Activity,”
AISC Steel Design Guide #11,
Chicago, IL, 1997. https://www.aisc.org/store/p-1556-design-guide-11-floor-
vibrations-due-to-human-activity-see.aspx.)
• AASHTO (2009)
•
f
180
≥
3 0
.
Hz and
f
≥
2 85
.
ln
w
•
W
≥ 180e
−0.35
f
• Special cases:
f
≥ 5.0 Hz
• British Code (
1978 BS 5400
)/Ontario Bridge Code (1991)
•
f
o
≥ 5.0 Hz
•
a
max
= 4π
2
f
o
2
y
s
K
ψ ≤ 0.5(
f
o
)
1/2
m/s
2
•
F
= 180 sin(2π
f
o
T
) N
•
v
t
= 0.9
f
o
m/s (≥ 2.5 m/s per Ontario Code)
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