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I have read some papers discuss the torsional resistance of C-section (T-section) to lateral torsional effects but they seem to all use finite element (software) when composite action is considered in the analysis. The books mentioned above are really helpful plus the IBC seismic design manual...

Thank you so much Shu Jiang, what you shared has given me an insight to start doing it roughly. Would this approach neglect torsional strength provided by the composite wall sections? It would be really helpful if you could share a simple example for guidance or a reference that covers this...

Hi Dik, It is a 20m x 22m building plan with 5m o.c. on x-axis, 5m o.c. y-axis and the remaining 2m is just in between 10m of the 22m long side. The corewall sits at the centre (x=10m, y=11m from any corner point). We do have two small exit stairs on each far-end (x=0, y=11m and x=20m, y=11m)...

Thanks Kootk, I just got this excellent book too.

I found a sample calculation of shearwall-frame of low-rise r.c. structure in one of my old books. This example seems to use the approach allowed by ASCE as pointed out above. It is a good reference but rough analysis of C-section wall remains challenging without experience. Taranath book is...

No worries Kootk. I have just collected some related references.

Hi Kootk, I am from Asia and learning English through these conversations at the same time...[smile] So could you suggest any reference or share something related for our guidance? The building is going to be in one of Indonesia's provinces where PGA = 0.3g-0.5g. We usually have about 5.0-6.8...

Agent666, I agree that the C-section should be analysed compositely for better results [when analysed by software] but would it be possibly practical for hand calculations to crosscheck computer output? A friend in the team has told us that ASCE allows shearwall to carry 100% base shear while...

I have been doing a bit of designs that involve steel and concrete frames as the main resisting systems. Now, we got a project six-storey reinforced concrete medium commercial building that requires an elevator, which our design team want to include a core-wall (C-shaped) to take care of the...