KAPASITAS LENTUR PENAMPANG BAJA WF/H BEAM

PROJECT Proyek Bengawan SoloDATE

(by:engineer)

PILIH PROFIL WF 250x125x6x9Properties :

37.66 h 250 mm

4050 b 125 mm

294 6 mm

324 9 mm

47

= 352

Material BJ - 37 240 MPa 72 MPaE = 200000 MPaG = 76923 MPa

5.5 m2.75 m

KELANGSINGAN PENAMPANGFlange

= 6.94 = 10.973 = 28.546Kompak

Web= 38.67 = 108.44 = 164.6

Kompak

Kompak

MOMEN PLASTIS PENAMPANG= 84.45 kNm = 54.432 kNm

Untuk penampang Kompak maka :84.447 kNm

PENGARUH TEKUK TORSI LATERALParameter :

27.9 mmJ = 77454 mm

4.269E+10

2940000

Batas plastis sempurna

Ag cm2

Ix cm4

Iy cm4 tw

Sx cm3 tf

Sy cm3

Zx = (b * tf) * (h - tf) + tw * (0.5h - tf) * (0.5h - tf)cm3

fy = fr =

Panjang bentang, Lx

Jarak antar sokongan lateral, Ly

l = b/2tf lp = 170/√fy lr = 370/√(fy - fr)

l = (h - 2tf)/tw lp = 1680/√fy lr = 2550/√fy

\ Penampang :

Mp = Zx * fy Mr = Sx*(fy - fr)

Mn =

ry =

Iw = mm6

Iy = mm4

= 1419.6 mm

Batas tekuk inelastis= 14524 MPa

= 1.718E-04

168 MPa= 4466 mm

2750 mm ==> Bentang menengah

Untuk bentang panjang,

1.00= 114.6 kNm

= 84.4 kNm

Untuk bentang menengah,

= 71.34 kNm

Untuk bentang pendek,= 84.45 kNm

64.20 kNm

CEK KELANGSINGAN PENAMPANG TERHADAP GESER= 38.67

a = jarak antar pelat pengaku atau sokongan laterala = 1200 mmh' = = 232 mm

5.187Batas-batas:

72.3290.07

==> Leleh geser

200.45 kN180.4 kN

Lp = 1.76*ry*√(E/fy)

X1 = (p/Sx)*√(E*G*J*A/2)

X2 = 4*(Sx/(G*J))2

Lr = ry*(X1/fL)*√(1+√(1+X2*fL2)) ; fL = fy - fr

Panjang Lb = jarak antar pengaku/sokongan lateral = Ly

Lb =

Mcr = Cb*(p/Lb)*√(E*Iy*G*J+Iw*Iy*(p*E/Lb)2) Cb =

Mn = min(Mcr,Mp)

Mn = Cb*(Mp - (Mp - Mr) *(Lb - Lp)/(Lr - Lp))

Mn = Mp

\ KUAT LETUR PENAMPANG RENCANA fM n,fMn =

(h - 2*tf)/tw

kn = 5+5/(a/h')2

h - 2*tf

kn =

1.10√(kn*E/fy) =1.37√(kn*E/fy) =

Vn =fVn =

Kontrol1 -0.229277000819

1 -1.2425041101

2 -1.2425041101

(l - lp)/(lr - lp)

Kontrol2

Kontrol Vn (kN)1 200.45

374.90

869.25

KAPASITAS TEKAN PENAMPANG BAJA WF/H BEAM

PROJECTDATE

(by:engineer)

PILIH PROFIL WF 250x125x6x9Properties :

173.9 h 350 mm 15.22 cm

40300 b 350 mm 8.84 cm

13600 12 mm

2300 19 mm

776

MATERIAL BJ - 37 240 MPa Panjang Lx = 12.50 m k = 1.0E = 200000 MPa Ly = 12.50 m k = 1.0G = 76923 MPa

KELANGSINGAN PENAMPANGFlange

= 9.21 = 16.166 Non-Slender

Web= 26 = 43.0 Non-Slender

\ Penampang : Non-Slender

TEGANGAN KRITIS TEKUK LENTUR= 82.1= 141.3

= 141.3

= 1.5586

3.0365 (koefisien tekuk)

= 79.039 MPa

1237 kN

Ag cm2 rx

Ix cm4 ry

Iy cm4 tw

Sx cm3 tf

Sy cm3

fy =

l = b/2tf lr = 0.56√(E/fy)

l = (h - 2tf)/tw lr = 1.49√(E/fy)

lx = kx*Lx/rx

ly = ky*Ly/ry

l = max (lx; ly)lc = (l/p)*√(fy/E)

w =

fcr = fy/w

KUAT TEKAN PENAMPANG RENCANA, fN nfNn = 0.9*fcr*Ag

fNn =

Kontrol1

11