staad pro ce

RE: staad pro ce

Design is life — Tue, 01 Nov 2022 07:32:25 GMT

ok got it thanks a lot.

RE: staad pro ce

Suvadeep Acharjee — Tue, 01 Nov 2022 07:28:22 GMT

It depends on actual requirements in the structure, your modelling approach and engineering judgement. For example center line modeling approach is generally used in STAAD.Pro, so if heights are different for two entities and requirement is to make the tops flush then you may use the offset command to make the tops flush. So this is not a question about preference for analysis results but rather the modelling requirements.

RE: staad pro ce

Design is life — Tue, 01 Nov 2022 06:37:25 GMT

Now which model is prefer for analysis result??

RE: staad pro ce

Suvadeep Acharjee — Tue, 01 Nov 2022 06:25:49 GMT

When offsets are assigned to a member, the centerline of the member gets shifted with respect to it's incident nodes by the offset amount. Analytically rigid links are created between the incident nodes and start/ends of the member. As such due to eccentricity and lever arm arising out of such eccentricity, secondary forces are induced in the structure when offsets are used. This is not the case when there are no offsets and as such no eccentricity to result in secondary forces. Thus it is expected that between two models one with offset and other without offsets difference in analysis results will be observed.