Bending Case 1
The most information in the strength calculation is of the bending under a load. The most common of the load cases is the point load in the center of the support, supported at both ends. The deflection consists of the deflection caused by the point load in the middle of the profile and the profile's own weight. The calculation takes into account both loads. The calculation shown here is for HEB100 to 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's 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
20.4.2015*21:30 (1070 - 695)
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