METI-LIS Technical Manual

For building columns
C z 2
= 0.052
(2.28)
For building clusters
C
= a ⋅ H b
(2.29)
z 2 s +
a = 0.039
⎛ W ⎞
b
W
b 0.0137
⎜ − 0.0085
H
⎟
b
= 1≦
≦5
⎝ b ⎠
Hb
W
b = 0.0038
b
< 1
H
W
b = 0.059
b > 5
H
b
b
When the wind does not form a right angle with the building, C z2 is found as the quantity
C z2(θ) , similar to C z1 . The quantity C z2(θ) is found with one of the following equations using θ,
the angle between the building and the wind-direction axis, (provided that 0 º < θ ≦ 45 º
holds true) and the quantity C z20°) , found with Equation 2.28 or Equation 2.29.
For building columns when
h > H
s
b
W
z2(
θ)
= C o ( 1 − 0. 0136 θ)
b > 1. 0 (2.30)
z2(0
H
C
)
C
z2(
)
= C
b θ o
≦ 1. 0
z2(0 )
Hb
W
b
For building clusters when
h > H
s
b
C
θ
= C
(2.31)
z2(
)
o
z2(0 )
For building columns when
h ≤ H
s
b
W
z2(
θ)
= C o ( 1 − 0. 0072 θ)
b > 1. 0 (2.32)
z2(0
H
C
)
C
= C
b z2(
θ )
o
≦ 0
z2(0 )
Hb
For building clusters when
C
z2(0 )
h ≦ H
( 1 − 0. θ)
s
b
z2(
θ)
= C o 0098
(2.33)
W
b
1.
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