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sm10 64

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PROBLEM (10.64) The beam AC in Fig. P10.64 is made of a W 150 x 24 rolled-steel shape (see
Table B.8) and M = 10 kN m, P = 4 kN, L = 3 m, and E = 210 GPa. Calculate the deflection at C.
SOLUTION
Table B.8: I = 13.4 × 106 mm 4
P
A
L/2
C
P
M0
L/2
B
L/2
Actual Loading
M0
A
C
B
Equivalent loading
Use Table B.14 (cases 7 and 9):
vC = (vC ) P + (vC ) M
PL3 M 0 ( L 2) L2
( − L2 )
−
48EI
6 EIL
4
2
L
=
(− PL + 3M 0 )
48EI
=−
Thus,
vC =
(3)2 (−4 × 3 + 3 × 10)103
= 1.2 mm ↑
48(210 ×109 )(13.4 ×10−6 )
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