8/7/2019 grinda planseu lemn

1/2

Grinda plansu de lemn

q 455 daN

m:= E 11000 N

mm2

:= d 3.85m:=

Mq d

2

8:= M 843.03daN m=

mui 1:= mdi 0.6:=

Ri 16.8N

mm2

:= i 1.1:=

Ric mui mdi

Ri

i:= rezistenta de calcul la incovoiere in lungul fibrelor a lemnului

Ric 91.636daN

cm2

=

WnecM

Ric

:=

Wnec 919.973 cm3

=

b 15cm:=

hnecWnec 6

b:=

hnec 19.183 cm=

h 22cm:=

Wgb h

2

6:= Wg 1210cm

3= Iq

b h3

12:= Iq 13310 cm

4=

mTi 1:= mL 1:=

MI Ric Wg mTi mL:= momentul capabil al sectiunii propuse

MI 1108.8 daN m=

f5

384

q d4

E Iq:= f 0.889 c m= sageata efectiva

fadmd

400:= sageta admisibila - criteriu exagerat

fadm 0.963 cm= sageata admisibila

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8/7/2019 grinda planseu lemn

2/2

daN 10N:=

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