Bigbeam
Structural
- Jun 22, 2008
- 5
How do I specify the unbraced length of the compression flange of a beam in bending?
I am designing a gas bar canopy with cantilevered column and beam over, forming a T. The top flange of the beam is fully braced with the bottom flange can be considered braced at both ends and at the column.
I tried locally setting the unbraced length ratio for the member but I etabs always calculates the capacity based on full bracing of the compression flange which is clearly wrong.
I should really be able to specify the unbraced lengths of both the top and bottom flanges so that positive and neg. moments can be calculated properly.
K
I am designing a gas bar canopy with cantilevered column and beam over, forming a T. The top flange of the beam is fully braced with the bottom flange can be considered braced at both ends and at the column.
I tried locally setting the unbraced length ratio for the member but I etabs always calculates the capacity based on full bracing of the compression flange which is clearly wrong.
I should really be able to specify the unbraced lengths of both the top and bottom flanges so that positive and neg. moments can be calculated properly.
K