8/16/2019 Perhitungan Kantiliver Kiri

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PERHITUNGAN KANTILIVER KIRI-KANAN

a. Beban yang bekerjaKombinasi D L! "#$%& kgKombinasi ' H ! 0,003557 kg

N u= ¿

"#$%&(##) kg ! *$*"%&(##) +onKombinasi D L! 348,13 kg.mKombinasi ' H ! 217,43 kg.m

M u= 565,56 kg.m

b. Aksi Ko,om

. ak+or /anjang e0ek+ik k x 1i +en+2kan 1engan mengg2nakan 0ak+or G3

G A= 1,0 ( jepit )

GB=∑ I x L (kolom )

∑ I x L (balok )=

23700600

136001489,84

+ 13600212,8355

= 0,541

k x= 1,15

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k x L xr x

= 1,15.35017,7

= 22,74

k y L yr y =

1.175

3,95 =44,30379

λc=1π

k y L yr y √ f y E = 1π 44,30379 √ 240200000 = 0,48852

ω = 1,431,6 − 0,67 λc

= 1,431,6 − 0,67 (0,48852 )

= 1,1236

N n= Ag f cr = Ag(f yω )= 8412 (

24001,1236 )= 17967913,41 kg

N uϕ N n

= 4657,490.85 (17967913,41 )

= 0,000305 < 0,2 maka 1i g2nakan /ersamaan

N u2 ϕ N n

+ ( M uxϕb M nx)< 1,01. Aksi Ba,ok

b f 2. t f

= 1752.11

= 7,95455 < λ p= 170√ f y= 10,97345

N uϕb N y

= 0,09123557 . 104

0,9 (240.6314 ) = 0,0006 6897 < 0,125

4aka$

λ p=1680√ f y (1 − 2,75. N uϕb N y )= 1680√ 240 (1 − 2,75 (0,00066897 ) )= 108,2 44

λ= t !

= 350− 2 (11 )

7= 46,86 < λ p= 108,244

- Ben+ang Panjang Lp " L " Lr ≫ 200,687 " 212,836 " 592,505 #$%&

PERHITUNGAN BENTANG 4ENENGAH M p= ' x f y= 841.2400 = 2018400 kg.cm

M r= ( x(f y− f r )= 775 (1700 )= 1317500 kg.cm

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M n= ) b[ M r + ( M p− M r ) Lr− L Lr− L p ]" M p M n= 1,67

[1317500 +(2018400 − 1317500 ) 592,505 − 212,836

592,505 − 200,687

] M n= 3334434,51 kg.cm M n> M p

M n ti*ak bole mele!ati M p +maka*i ambil M n= 2018400 kg. m

ϕ M n= 0,9 (20184 )= 18165,6 kg.m

e. Pembesaran 4omenk x L x

r x= 1.200

17,7= 11,2995

) m= 0,85 (ujung kaku )

N el=π 2 E . Ag

(k Lr )2 =

π 2 200000.63,14

(11,2995 )2 = 976148,4424 kg

, b=) m

1− N u

N el

= 0,85

1− 95,123557976148,4424

= 0,85 < 1

Di ambi, , b= 1

0. Kon+ro, M ux= , b . M u= 1.565,56 kg.m= 565,56 kg.m

N u2 ϕ N n

+( M uxϕb M nx)= 95,1235572.0,85 . 17967913,41 +( 565,5618165,6 )= 0,03114