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Taivutustapaus 1

The most necessary information for the strength calculating is the body bending under load. Of the load cases one of the most common is the general case in which the concentrated load effects in the middle of the girder which is supported at the both endsDeflection consists of the concentrated force in the middle and of the girder own weight. The calculation takes into account both deflectionsThe calculation to HEB100 - HEB500 profiles.

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f = F x L3 / (48 x I x E)

Profile      L1000      σt           Ix          Wx          Iy         Wy                    Area

Nimike       cm      kN/cm2     cm4          cm3           cm4        cm3      kg/m    A cm2

HEB100      518         2.2         450          90         167       33.5       20.4      26

 

Deflection of the girder weight;

F = Weight of girder

     5.18 m x 20.4 m/kg =  1.04 kN (105.6 kg)

L = from the table 518 cm

Ix = from the table 450 cm4

E = constant 20600 kN/cm2    

f = deflection

f = 5 x F x L3 / 384 x E x  I

f = 0.204 cm

 

Deflection of the concentrated force;

F = 1 kN

f = F x L3 / 48 x I x E

f = 0.314 cm

 

Total deflection;

0.204 cm + 0.314 cm = 0.518 cm

518 cm / 1000 = 0.518 cm

1:1000

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20.4.2015*21:30 (1070 - 695)
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