CALCUL ECLISA

Materiale: OTEL OL37Rc= 210 N/mm2 Rand hcum

i hreli

t1= 4 mm 8 0 Tt2= 12 mm 7 0 0

Caracteristici buloane: 6 300 60 NM12 5 290 604.6 4 180 60 M

Ab= 113 mm2 3 120 60Anb= 89 mm2 2 60 60Rc

b= 209 N/mm2 1 50 50Ri

b= 167 N/mm2

Rfb= 125 N/mm2

Rpgb= 340 N/mm2

Latime eclisa becl= 290 40 60 90 60 40Inaltime eclisa hecl= 400

Di t b l i li 50

Rezistenta de calcul otel

Buloane

Arie bruta bulonArie neta bulon

Grupa Bulon

Rezistenta de calcul bulonRezistenta intindere bulon

Rezistenta presiune bulon

= 34 kN

= 1 kN

= 22 kNm

Grosime eclisaGrosime inima profil

Rezistenta forfecare bulon

Dist bulon margine eclisa = 50Nr buloane solict nx= 12Nr buloane solict ny= 12

Dispunere buloane: Eforturi sectionale in surubul cel mai solicitat:nv= 6 Nno= 4 nt

nt= 24 Tnf= 2 nt

Distante buloane:dmin1= 24 mmdmax1= 32 mmdmin2= 36 mm Eforturi sectionale capabile:dmax2= 48 mm Ncap

i= AnbxRib

Eforturi imbinare: Ncapf= nfxAbxRf

b

N= 1 kN Ncappg= dxΣtixRpg

b

T= 34 kNM= 22 kNm Eforturi unitare in surubul cel mai solicitat:

26.19 kN NbmaxM

6.984 kN Ab

xH=N/nx= 0.083 kN NbT

yT=T/ny= 2.833 kN Ab

= 0.0 kN

= 1.4 kN

Σhi2

σM=

Numar randuri buloaneNumar coloane buloane

Numar sectiuni forfecareNumar total buloane

Efort in bulon din axiala

Dist. maxima intre buloane

Distanta minima margineDistanta maxima margineDist. minima intre buloane

NbN=

= 128.6 N/mm2

τ=

Ef. cap. la pres. pe gaura = 32.6 kN

= 14.5 kN

Efort capabil intindere = 14.9 kNEfort capabil forfecare = 28.3 kN

Efort in bulon din taietoare NbT=

= 12.5 N/mm2

Efort in bulon din moment NbmaxM=

M x hmax

22/ iiMaxM yxyMx 22/ iiMaxM yxxMy

yT y b

Verificari: σech= σM2+3xτ2

28 kN <= 130.4 N/mm2

28.3 kN OK 22HMHMMAX yyxxN