Verificarea la forta taiatoareAsl As 34.56 cm

2==

Ved 419.60kN=

VRd.c CRd.c k 100l fck( )13

bw d=

c 1.5=

CRd.c0.18c

0.12==

k 1 200mmd

+ 1.626== < 2

=> k 1.626=

lAsl

bw d0.007== < 0.02

=> l 0.0068=

VRd.c CRd.c k 100 l fck( )13

bw d 245.42 kN== > 0.035 k

32

fck

12

bw d 185.05 kN=

=> VRd.c 245.42 kN=

VRd.c 245.42 kN= < Ved 419.6 kN=

=> se impune armatur la = 45 i = 90

z 0.9 d 459 mm==

AswS

=

Vedfywd z

3.047 mm2

mm=

nec

n 6= 14mm= swpi

2

41.539 cm2==

Asw n sw 9.24 cm2

== => SmaxAswVed

fywd z

303.1 mm==

S 300mm=

Verificare armturiilor supuse la for tietoare:

AswS

3.079 mm2

mm= >

AswS

2.878 mm2

mm=

eff nec

VRd.sAsw

S

3.079 mm2

mm==

eff

VRd.max 0.5 bw 1fcd

fywd=

1 0.6 1fck

250 N

mm2

0.54==

VRd.max 0.5 bw 1fcd

fywd 15 mm

2

mm== > VRd.s 3.079

mm2

mm=

=> etrieri 14/30

Dimensionarea praiului:NEd 1600kN=

L 7.10m=M0 1.0=M1 1.0=

- Oel folosit S275 => fy 275N

mm2

=

Predimensionare:

NEd Nc.Rd=

=> AnecNEd M0

fy58.18 cm2==

Nc.RdAnec fy

M0=

=> CHS 324x8: d 324mm=t 8mm=

h 324 mm=b 324 mm=iy 103.5mm=

Aextpi d2

4824.48 cm2==

Aintpi d 2 t( )2

4745.06 cm2==

A Aext Aint 79.419 cm2

==

Clasa seciunei:

235 N

mm2

fy0.924==

dt

40.5= < 50 2 42.727= => seciune de clasa 1

Verificarea de rezisten:

NEdNc.Rd

1.0

Nc.RdA fy

M02184 kN==

NEd 1600 kN=

NEdNc.Rd

0.733= Seciunea este aleas corect din punct de vedere al rezistenei

Verificarea la flambaj:NEd

Nb.Rd1

Lcr.yy 1 L cm==

E 210000 N

mm2

=

1 piEfy

86.815==

baratLcr.yy

iy

11

0.79==

seciune finisat la cald

Din tabelul 6.1 i 6.2, SR EN 1993-1-1:2006 => 0.21=

0.5 1 barat 0.2( )+ barat2+ 0.874==

1

2

barat2

+

0.801==

Nb.Rd A fy

M11750 kN== NEd 1600 kN=

NEdNb.Rd

0.91= Seciunea este aleas corect