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DOCUMENTE SIMILARE

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. , ,
,

I.

1. 70 , 21. [10.

2.

)

Вmax = g*(0,27V+0,78)*ʭ1*2

: g=25kN/m3 o

V : V=1m/h t=7C

V=2m/h t=15C

1 .

2 - .

1,max=25*(0,27*1+0,78)*1,2*1,15=36,225kN/m2

2max=25*(0,27*2+0,78)*1,2*1,15=39,60kN/m2

)

- + 13 6 kN/m2

- 4 kN/m2

)

q1=(36,225+6)*1,3=54,89 kN/m2

q1=(39,60+4)*1,3=56,68 kN/m2

)

q1=36,225 kN/m2

q1=39,60 kN/m2

) Pmax

3.

)

-        

l=250

- l=250mm l=375mm

-

g*R*W ; Mmax=0,10*q*l2 =>0,10*q*l2 g*R*W

4.

[10 =7,262 ; Ix = 92,84 ;Wx=18,53

l = 0,375m

:

-

q2=56,68*0,375=21,26 kN/m2

-

q2=39,6*0,375=14,85 kN/m2

-

*

-

g*R*W

W=18,53>Wnt

5. 2750

qmax=59kN/m

q=56,68* 1,0 =56,68kN/m< qmax=59kN/m

maxP=A =>

II.

-

1.

) . 0,021g=0,021*10=0,21kN/m2 0,43kN/m2

) . 25*0,16= 4 kN/m2

) . 1*0,14=0,14 kN/m2

) . 2,50 kN/m2

-

q1= 0,21*1,1+(3,5+0,14)*1,2+2,5*1,3=7,87kN/m2

q1= 0,21+3,5+0,14=3,87kN/m2

-

q1= 0,43*1,1+(3,5+0,14)*1,2+2,5*1,3=8,09kN/m2

q1= 0,43+3,5+0,14=4.07kN/m2

2. .

-

-

g*R*W ; Mmax=0,100*q*l2 =>0,100*q*l2 1*R*W

3.

[100.50.5 Ix=92,84 Wx=18,53

)

q1= 8,09*0,5=4,045kN/m2

q1=4,07*0,5=2,035kN/m2

) :

-

-

g*R*W ; Mmax=1/8*q*l2 =>1/8*q*l2 g*R*W

4,20 -> 3.96-0,20-2*0,145=3,67 m 4.20-0.24=3.96m 5.30-0.24=5.06m

l2=5.06-2*0.145=4.77>3.96

=> => l2 =1/2*4.77=2.385

4.

=25kN 2[20 Ix=371,754 Wx=37,173 g=7,99/

) l=3.96

q1= 8,09*3.96*1/2+2*0,0799*1,1=16.2kN/m

q1=4,07*3,96*1/2+2*0,0799=8.22kN/m

) :

-

-

g*R*W ; 0,125*q*l2 g*R*W

-

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