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The reduced design spectral acceleration S aR (T), which is the ordinate of the reduced design acceleration spectrum for a given natural vibration period T , used to determine the reduced earthquake loads in the horizontal direction , is that of Sae (T) ,Horizontal Elastic Design Response Spectrum ,R (TA)'toDetailed Description Explanation (Annex Appendix-4A) is obtained by dividing the Earthquake Load Reduction Coefficient.
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On the Analysis Settings Wizard - Design Spectra tab, the spectral acceleration coefficients obtained from AFAD based on the coordinates and the horizontal elastic design spectrum Sae (T) are calculated according to the formula below . Horizontal Elastic Design Response Spectrum , it is represented by a total of 4 functions, different in each region, and shown with the graph below.
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The reduced design spectral acceleration S aR (T) is represented by the graph:
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