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The excel file containing the following calculations can be accessed.
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Reduced Design Spectrum of the Building
In TBDY 2018 4.2.1.2, the horizontal elastic design spectrum is reduced with the by earthquake load reduction coefficient Ra(T).
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The interval for T is taken as 0.005 s for precision calculation. Therefore, the entire spectrum cannot be shown in the image above. It is given below graphically.
To get the reduced design acceleration spectrum that the program calculates for the upper part, simply type 'exportspectrum‘exportspectrum' in the lower toolbar command line and press enter. It can be gotten as txt file. It saves the file as 'exp_spec.txt txt’ in the Computer: C: Program Files :ideCAD v10 folder. From herefolder, you can take the txt file and compare the spectrum calculated by the program with the manual calculation in excel.
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In the graph above, it is seen that the manually calculated reduced spectrum and the reduced spectrum calculated by ideCAD overlap and the calculation is correct.
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