service load combinations

[AJA14]

Hi. After generating automatic code combinations as per LRFD, i can't find the seismic loads in any of the SLS combinations. They can only be found in ULS combinations. I transfered to ACI and used ACC loads, but still i don't get any service combinations including seismic loads. I even tried BS 5950, but in that case, I received nothing in both the ULS and SLS cases. Any ideas. Thanks.

[Rafal.Gaweda]

Seismic cases in SLS combinations ?

Please provide us code paragraph saying that.

[Artur.Kosakowski]

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 I even tried BS 5950, but in that case, I received nothing in both the ULS and SLS cases. Any ideas. Thanks.

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Most likely after changing the code the default relations among load cases have been lost. You need to restore them in the way shown on the attached picture.

[AJA14]

I think I did not explain myself clearly. In UBC, the code provides ASD load combinations that include the original load combinations but with 1.0 factors except for seismic loads which are divided by 1.4 becuase the code is based on an ultimate seismic force. That is why, in lrfd code combinations, seismic loads are multiplied by 1.0. We are trying to see if we can automatically generate the ASD load cominations that include the seismic load divided by 1.4. Sorry for the misunderstanding. Would appreciate any input on the matter.

[Rafal.Gaweda]

I think you mean this: