Perhitungan Sloof (Tie Beam) [PDF]

Citation preview

PERHITUNGAN SLOOF VII.1 Perencanaan balok sloof Data perencanaan Penampang balok (b x h) Mutu beton (f'c) Mutu baja (f'y) (ulir) Mutu baja (f'y) (polos) Berat jenis beton Modulus Elastisitas (E) Tebal selimut beton Ø tulangan utama Ø sengkang Tinggi efektif (d) Penurunan yang diijinkan (δ)



= 40 cm x 60 cm = 25 MPa = 400 MPa = 240 MPa = 2400 kg/m³ = 23500 MPa = 4 cm = D19 mm = Ø10 mm = 540.50mm = 5 cm



IV.2 Perencanaan penulangan » Menghitung nilai Mu E x I - Mu = 12 x = =



x



δ



L



2



23500000



x 0.007200 x 12 x 5.25²



25.58



» Tulangan utama lapangan Mu 25.58 - Mn = = Ø 0.8 -



Rn =



-



m



=



-



ρb



=



= =



0.05



Mn bd2



31.97 KNm



31972789 Nmm



=



( 400



fy 0.85 f'c



=



β1 f'c



0.85 fy 0.85



=



0.85 400



0.0271



x



400 0.85



[ 25



=



540.5² ) =



18.824



600 +



fy



]



600



600 +



25



600



[



0.27 N/mm²



400



]



-



ρmax



= = =



0.75 ρb 0.0271 0.75 0.0203



-



ρmin



=



1.4 fy



-



ρperlu



=



1 m



=



1 18.824



=



{



1.4 400



=



=



0.0035



1



-



√



1



-



{



1



-



√



1



0.00069



→



2



-



m Rn fy



}



2



18.824 x 400



x



0.27



ρ min > ρ < ρ maks



Karena nilai ρ < ρ min, maka digunakan ρ min - Luas tulangan utama (As)



Maka tul. atas digunakan Maka tul. bawah digunakan



= = =



ρmin x b 0.00350 x 756.70 mm² 2 3



D19 D19



x d 400



x



( 567.06 mm² ) ( 850.59 mm² )



540.5



Ok!



}