Temperature Loads in STAAD Pro

What is the total length of your building?

If it is longer then 30m, divide your building onto isolated blocks 30m long each (or less as it pleases the layout or the architect) ; the borders between blocks should have doubled columns (shearing a common foundation) and doubled beams/rafters and clear gaps of minimum 0.02m.

The expansion joint on the walls would be caulked on the facade whereas doubled roof parapets would have a flexible cover.

From STAAD modeling perspective you should build a separate model for each block.

Then, you can try your temperature loading again. The resulting lateral internal forces and reactions should not be excessive.

FYI, thermal expansion of steel and concrete is almost the same.

Cheers,

Len Bogdanov, Structural Engineer, Calgary

Thanks for the comment!

In fact the building was 35m long and thats y i thought of doing it as a single one.

Regards