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In this example, independent hand calculation results of the internal force values obtained as a result of the earthquake calculation with the mode shapes, periods and mode combination method of a two-storey system with a single span are made and the results of ideCAD Static are compared. The damping ratio used in response spectrum analysis is taken into account as 5%. Full Quadratic Combination (TKB or CQC) has been used as the modal combination method . Independent hand calculation solutions of periods, horizontal displacements and bending moments calculated as a result of modal analysis were made according to Chopra 2012.
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a step-by-step solution was made manually, the results were compared with the idecad structural results, and all results were found to be the same with 0% error.
