A lightly welded steel beam shown in Figure 5 is continuously supported along its length. A downward concentrated load of 4P acts at Point C, and two downward concentrated loads P act at Points A and E. The beam with full lateral restraint is bent about its major principal x-axis. Determine the followings: a. Section type based on section slenderness; b. Effective section modulus; c. The maximum design value of P. P A k B duu * 6 m 6 m 4P * 6 m um * 6 m E

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Chapter5: Beams
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A lightly welded steel beam shown in Figure 5 is continuously supported along its length. A downward concentrated load of 4P acts at Point C,
and two downward concentrated loads P act at Points A and E. The beam with full lateral restraint is bent about its major principal x-axis.
Determine the followings:
a. Section type based on section slenderness;
b. Effective section modulus;
c. The maximum design value of P.
A
k
B
fu
6 m
d
tw
bf
6 m
tf
4P
d
bf
tw
tf
=
-
=
fyf=
fyw
6 m
D
um
*
550 mm
206 mm
6
mm
10
mm
320 MPa
= 340 MPa
Zx=1362985 mm³
Sx 1533750 mm³
Figure 5 Steel beam under design loads.
6 m
P
E
Transcribed Image Text:A lightly welded steel beam shown in Figure 5 is continuously supported along its length. A downward concentrated load of 4P acts at Point C, and two downward concentrated loads P act at Points A and E. The beam with full lateral restraint is bent about its major principal x-axis. Determine the followings: a. Section type based on section slenderness; b. Effective section modulus; c. The maximum design value of P. A k B fu 6 m d tw bf 6 m tf 4P d bf tw tf = - = fyf= fyw 6 m D um * 550 mm 206 mm 6 mm 10 mm 320 MPa = 340 MPa Zx=1362985 mm³ Sx 1533750 mm³ Figure 5 Steel beam under design loads. 6 m P E
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