Beam bending - Angle change

[David_Berglund]

Where is the mistake?

I am calculating for a HEA180 that is simply supported at each end and has a uniformly distributed load where I want to find the angle change at the connections.

L = 4900 mm
q = 5.29 kN/m
E = 210000
I = 2510 * 10^4 mm^4

Case from the table below.

I get the angle change Ѳ to 49.2

Where am I going wrong?

If it's degrees, it's unreasonable, and if it's radians, it's even more unreasonable. I guess it's a decimal or unit error.

Can someone help?

 

[David_Berglund]

I can mention that the deflection at the middle is approximately 8.3mm with the same data.

So a right triangle with the same dimensions where leg 1 = 2450 and leg 2 = 8.3mm would have an acute angle of 0.19°, which is entirely reasonable. However, the angle at the attachment point should be somewhat larger as I assume it follows a parabolic shape.

 

[bossespecial]

4.92*10^-3
It's probably just a unit error.

 

[scorp1on]

My advice is to always use SI units

 

[David_Berglund]

0.00492, and thus expressed in radians? Which becomes 0.28°, which in that case is quite reasonable. Is it correct?

Strangely, I get the correct unit for the deflection with these units.

But of course, I agree, SI prevents mistakes.

Thanks for the help!