Page 93 - KAJIDAYA BAHAN

KAJIDAYA BAHAN

4
3
Y [384 E b( 3b) ] = 60WL
4
4
Y [384 E 27b ] = 60WL
60 WL 4
4
b = ---------------
10368E
3
60 x 3.75x 10 x 4 4
= ----------------------
9
10368 (10 x 10 )

b = 36.30 mm

Contoh 5

Buktikan persamaan pesongan rasuk di bawah :

y P
L/2 L/2 Persamaan lengkungan anjal rasuk
y = 0
2
y = 0 x d y
EI dx 2 = M
y max
A B dy = 0 C
dx

Penyelesaian

Had sempadan
x = 0 → y = 0

L dy
x = → =  = 0
2 dx

Persamaan momen lentur
M
M = 0

V Px
 M = kNm
P 2
2

Kamilan pertama terhadap persamaan asas
2
 d y
M dx
EI 2 dx = 
 dx

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