7/18/2019 Metal Tema 2 Grinda Cu Inima Plina

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Dale George

III CCIA gr.I

Metal tema 2

Predimensionarea inimii

n 18:=

fy 235N

mm2

:= L 20000m:=

q 20kN

m0.5n 180

kN

m=:= fadm

L

40050 m=:=

MEdq L

28

103 kN=:=

!Edq L2

1.8 103 kN=:=

"ne#

MEd

fy

3.83 10$ mm3=:=

alegem %& 10m:=

'& 1.1"ne#

%&

2.153 103 m=:= alegem 1000mm '& 1000m:=

Cond(%(a de )*el%e%e a (n(m((

'&

%&

100 150+ ,1000

10100 *er(f(#a

Cond(%(a d(n for%a %a(e%oare

%&

!Ed

'&

fy

3

!Ed

'&

fy

3

13.2-$ m= *er(f(#a

7/18/2019 Metal Tema 2 Grinda Cu Inima Plina

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Predimensionare talpilor

Af

"ne#

'&

0.1- '& %& 3.-$ 104 mm2=:=

Alegem %f 30m:= %f %& 2mm+ %f 2 3+ ,%

f

Af

%f

1.223 103 m=:= alegem 500mm f 500m:=

!er(f(#am

# 15%f235

fy

450 #500mm 20mm

2240 m=:= *er(f(#a

f

1

3

1

5

' ' /

1000

3333.333= *er(f(#a

Incadrareain clasa de sectiuni

Talpa comprimata 1:=

#

%

245

308.1-$= 8.1-$ %ala #la)a 1

Inima incovoiata

#

%

1000

10100= 100 124 (n(ma #la)a 3

e#%(ne #la)a 3

Area: 40000.0

Perimeter: 4100.0

Bounding box: X: -250.0 -- 250.0

Y: -530.0 -- 530.0

Centroid: X: 0.0

Y: 0.0

Moments o inertia: X: !"#2333333.3

Y: $250!3333.3

Produ%t o inertia: XY: 0.0

&adii o g'ration: X: 4$!.!

Y: 125.0

Prin%i(a) moments and X-Y dire%tions about %entroid:

*: !"#2333333.3 a)ong +1.0 0.0,

: $250!3333.3 a)ong +0.0 1.0,

7/18/2019 Metal Tema 2 Grinda Cu Inima Plina

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Iy 8$2333333.3mm4:= I -25083333.3mm

4:= AG 40000mm2:=

ma 515m:= yma 100m:=

"ely

Iy

ma

1.$0$ 104

#m3

=:= "el

I

yma

-.251 103

#m3

=:=

Verificarearezistentei la incovoiere plana pura

MEd

M#.d

1.0 M#.d

"el.m(n fy

M0

en%r )e#%(n( (n #la)a 3

M0 1.00:= M1 1.00:= M2 1.25:= "el.m(n "ely 1.$0$ 104 #m3=:=

MEd 103 kN=

M#.d

"el.m(n fy

M04.012 10

3 kN=:=

MEd

M#.d

2.243= 0.33- 1