deflection smaller in a heavier loadcase

[tord]

Hello ARSA support

How come that the slab-deflection is smaller in a heavier loadcase.

In Eurocode 1990 and 1992-1-1 (Concrete) we use to calculate deflections either in characteristic loadcase (6.14b) or in frequent loadcase (6.15b).
We calculate cracks in quasi-permanent loadcase (6.16b).
In my calculation I have 2.6mm deflection in loadcase 6.15b and 16.9mm in loadcase 6,16b which is lighter.
See attachments.

Thanks / Tord

[Rafal.Gaweda]

Combination 20 should be set as QPR to properly calculate reinforcement - as written in warning message.

[tord · Accepted solution]

Thank you Rafal, but how about the deflection?

I want to test the deflection, with the new choice of reinforcement, to another loadcase.

In this case it´s a tiny difference, but i some cases for deflection the liveload will be multiplied with 0,7 and for Quasi (crack´s) with 0,3, then the difference will be considerable.

Tord