I am currently using ETABS and UBC Code to model buildings in the middle east. Although ETABS calculates lateral drifts I am not sure of the following :-
1. ETABS calculates lateral drifts based on the SRSS earthquake load case. Does this value need to be multiplied by 0.7 R to obtain maximum inelastic displacements, or is this already included in the analysis. The maximum value of this drift has an upper limit of 0.02
2. This is the part I am not sure about. I also want to limit service drifts to H/500. Do I simply divide the drift by 1.4 to get service loads or do I need to multiply the ETABS drifts by 0.7 R / 1.4
1. ETABS calculates lateral drifts based on the SRSS earthquake load case. Does this value need to be multiplied by 0.7 R to obtain maximum inelastic displacements, or is this already included in the analysis. The maximum value of this drift has an upper limit of 0.02
2. This is the part I am not sure about. I also want to limit service drifts to H/500. Do I simply divide the drift by 1.4 to get service loads or do I need to multiply the ETABS drifts by 0.7 R / 1.4