In the video : Response Spectrum Analysis as per IS1983 in Staad Pro. V8i (Dynamic Analysis) by Mr.Anand Paul, it shows Storey Drift can be calculated using Response Spectrum But when I tried .......... There comes ERROR: STORY DRIFT WILL NOT BE CALCULATED CORRESPONDING TO RESPONSE SPECTRUM LOAD CASES. RESPONSE SPECTRUM COMPUTES JOINT DISPLACEMENTS THAT REPRESENTS MAXIMUM MAGNITUDE OF THE RESPONSE QUANTITY THAT IS LIKELY TO OCCUR DURING SEISMIC LOADING. ANY RESPONSE QUANTITY LIKE STORY DRIFT, TORSIONAL IRREGULARITY,ETC SHOULD BE CALCULATED FROM ACTUAL DISPLACEMENTS OF EACH MODE CONSIDERED DURING ANALYSIS. THE RESPONSE QUANTITY FROM EACH MODE SHOULD BE COMBINED USING MODAL COMBINATION TO GET THE MAXIMUM MAGNITUDE OF THAT RESPONSE QUANTITY. Could you please Clarify ?
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