Design Forces of Horizontal Braces Unlocated at Middle of Columns considering Random Initial Geometric Imperfections
Table 1
Geometric dimensions of column sections.
L (m)
b/L
λc
B (mm)
H (mm)
tf (mm)
(mm)
Αd (cm2)
8.57
0.7
50
392.45
800
18.23
14
12.5
8.57
0.7
75
284.23
800
21.33
17
11.8
8.57
0.7
100
226.98
800
23.56
19
10.5
10
0.6
50
446.65
800
16.83
13
13.5
10
0.6
75
322.28
800
19.92
16
12.5
10
0.6
100
256.49
800
22.22
18
11.2
12
0.5
50
523.54
800
15.05
12
14.5
12
0.5
75
376.58
800
17.98
15
13.5
12
0.5
100
298.81
800
20.22
17
12.0
15
0.4
50
639.93
800
12.88
11
15.5
15
0.4
75
446.65
800
16.83
13
14.5
15
0.4
100
352.54
800
19.26
15
14.0
Note. H, B—height and width of I-section, respectively; ,tf—thickness of web and flange, respectively; Ad—the cross-sectional area of the diagonal bracings.
