Environmental Engineering Reference
In-Depth Information
Symbol
Reference
DIN 1055-4
annex C
DIBt
guideline
Average wind speed
v
m
(z
e
)
[m/s]
Table B.2
34.71
34.71
Factor
a
Table B.2
1.00
Exponent
b
Table B.2
0.16
Turbulence intensity
I
v
(z
e
)
Table B.2
0.1368
0.1368
Factor
e
Table B.2
0.19
0.19
Exponent
f
Table B.2
0.16
0.16
Integral length
L
i
(z
e
) [m]
(C.9)
211
L
i
ΒΌ
200
Exponent
Table C.1
0.26
e
n
1,x
[s
1
]
Natural frequency of
fundamental vibration
(see Section 4.3.2)
(F.1)
0.289
0.289
Structural damping
d
s
(F.8)
0.0250
Parameter
a
1
Table F.2
0.050
Minimum value
d
min
Table F.2
0.0250
Equivalent mass
m
1
[kg/m]
Table
26.676
[kg/m
3
]
Density of air
r
1.25
Average aerodynamic force
coefficient
c
f
Table
0.75
Aerodynamic damping
d
a
(F.9)
0.0117
Logarithmic damping
decrement
d
(F.7)
0.0367
0.0367
Q
0
Squared basic gust
component
(C.10)
0.595
0.579
Transformed natural
frequency
N
1,x
[
]
(C.13)
1.761
1.667
Spectral density function
of wind speed
R
N
(C.12)
0.089
0.092
Aerodynamic transfer
function (height)
R
h
(C.15)
0.181
0.181
h
h
(C.15)
4.973
4.973
