ABSTRACT
The first natural period of the tall building is calculated as T d = 2.6174 sec. Both the modal response spectrum analysis and the equivalent lateral force analysis methods are used for the earthquake design. Los Angeles CA region is taken as a basis for both methods. The response modification R and the occupancy importance I factors are taken as 8 and 3, respectively. The 0.2 sec (Ss) and the 1.0 sec (S1) spectral accelerations are found as 2.1226 sec and 0.7837 sec, respectively. The base shear coefficient is calculated by ETABS as Cw = 0.177.
