Moment redistribution in AQB: No difference between SMOO 0 and 2

Hello everyone,

I am currently trying to perform moment redistribution using AQB.
However, I always obtain the same results, regardless of whether SMOO is set to 0 or 2.

Does anyone have an idea what might be causing this or whether there is an additional setting that needs to be considered?

Thank you in advance!

Hi,

you have to use SLSC … TYPM (main bending) instead of TYPT.

I also recommend to create combinations in aqb with a result loadcase number LCST. Then you can check the resulting bending moment of these loadcases in WinGraf and compare them, e.g.:

+PROG AQB URS:30.5
HEAD
echo full extr
CTRL SMOO 0
lc 900
REIN MOD SECT RMOD SING LCR 10
comb solo lc1 900 lcst 1000
DESI STAT ULTI

END

+PROG AQB urs:30.6
HEAD
echo full extr
CTRL SMOO 2
lc 900
REIN MOD SECT RMOD SING LCR 20
comb solo lc1 900 lcst 2000
DESI STAT ULTI

END

Best regards, Nora

1 Like

Works perfect, thanks you!

I have another question. I attempted to further reduce the bending moment by applying a moment redistribution using DELR. The redistribution factor depends on the ratio x/d, which in this case is 0.117.

The maximum allowable reduction factor must not exceed 0.85 for B500A and 0.70 for B500B. For this reason, I have set DELR to 0.70 in this case.

The reduced bending moment should then be calculated as follows:

grafik

However, whether I apply DELR or not, it unfortunately has no effect on the design moment calculated by Sofitik.

Hi,

the input DESI … DELR does not affect the design forces, but it will limit the height of the compression zone to x = (δ - 0,64)/0,8 * d. See explanation in the aqb-manual:

Best regards,

Nora