COMPLETE ETABS TUTORIALS : https://www.youtube.com/watch?v=zq0YbxzFN_I&list=PLDyhMW3kzPDAOR0UYuJaFNxv0e3cPlcUH How to check drift limit due to earthquake – Seismic Drift How to check seismic drift limit due to earthquake Etabs tutorial Check for seismic drift limitations Etabs tutorial for drift check Define Seismic load for drift Seismic serviceability check Structural stability check How to check for drift limitation in etabs Complete guide to drift check What is drift What is Global drift What is interstorey drift What is interstory drift ratio What is global drift ratio WHAT IS DRIFT? 1. GLOBAL DRIFT : Displacement of top storey w.r.t foundation 2. INTERSTOREY DRIFT : Displacement of one storey w.r.t adjacent storey displacement 3. GLOBAL DRIFT RATIO : Ratio of Displacement of top storey w.r.t foundation and the building height 4. INTERSTOREY DRIFT RATIO : Ratio of displacement of one storey w.r.t adjacent storey displacement and Elevation difference between the two stories SEISMIC DRIFT LIMIT CHECK UBC-97 UBC 97 imposes the drift limitation on interstorey drift ratio: Limit for interstorey drift ratio depends on time period For structures with time period T 0.7 limit is 2% (0.02) For structures with time period T 0.7 limit is 2.5% (0.025) Maximum inelastic drift Elastic and inelastic drift ratio 0.025 for structures having a fundamental period of less than 0.7 second. 0.02 for structures having a fundamental period of equal to or greater than 0.7 second Maximum Inelastic Response Displacement, which is the total drift or total story drift that occurs when the structure is subjected to the Design Basis Ground Motion, including estimated elastic and inelastic contributions to the total deformation Design Level Response Displacement, which is the total drift or total story drift that occurs when the structure is subjected to the design seismic forces. #etabs #engineering #design