Hi,
I have this kind of model with a cantilevered structure attached unto it as shown below in the image.
I'm a bit puzzled of the deflection result and i'm worried there is something wrong in my model. Can somebody explain this: whenever i use I section in the beam holding the cantilever structure the deflection is 184.069 mm whereas using hollow section for the same beam resulted to a minimal deflection of 4.523 mm. Is it because of the torsional stiffness greatly offered by hollow section than the open section? How does STAAD calculate deflection considering torsional constant of section? The deflection reduces to almost 95% and i want to be enlightened on this.
Thank you!
M.Mac
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