Civil Engineering Reference
In-Depth Information
for Eq. (3.13) are summarized in figure
3.5 for all loading conditions. Inspection of Eq. (3.13) indicates that load shape
plays a secondary effect on deflection, which is governed by the total lateral load,
W
. For example, the maximum deflection (
i
= 0) is controlled by the shape effi-
ciency term,
The calibration parameters
α, β
and
λ
η:
η =
α ⋅ψ
κ
(3.26)
η
ranges between 0.39 (hydrostatic) to 0.64 (wind). The hydrostatic and triangular
wind/seismic distributions provide the minimum and maximum values of
due to
the opposite nature of these distribution shapes, while the values for the other
shapes fall in the middle of the range.
η
Table 3.1
Geometric and Material Properties used for Analysis (Iskander et al. 2012A)
No. of
stories
Column
Height
Beam
Length
No. of
bays
Combinations of area moments
of inertias used in FEM
l
c
(in)
l
b
(in)
I
c
(in
4
)
I
b
(in
4
)
S
b
2073.6
2073.6
120
120
2073.6
3110.4
1
2073.6
3110.4
120
180
2073.6
4147.2
2073.6
4147.2
180
120
2073.6
5184
2073.6
6220.8
120
120
2073.6
8294.4
2073.6
10368
2
120
180
2073.6
20736
1,
2,
3,
4,
5,
6,
7,
8,
9,
10
2073.6
41472
180
120
2073.6
41472
2073.6
103680
120
120
3110.4
2073.6
2073.6
3110.4
3
120
180
4147.2
2073.6
2073.6
4147.2
180
120
5184
2073.6
6220.8
2073.6
120
120
8294.4
2073.6
2073.6
10368
120
180
4
20736
2073.6
2073.6
41472
180
120
41472
10368
2073.6
2073.6
120
120
5
120
180
