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Showing results for tags 'modal participation factor'.
Found 2 results
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I am attaching the modal participation of mass of building first mode and second mode time period is quite apart that is good but first mode seems to be torsional help me out if ETabs modal results are placed as first torsion then followed by x and y . I want to interpret the results if these are good that I can lock my structure and go into designing? Moreover these are my center of mass and rigidity they are also 7 to 8% apart so I want to know if my building first mode is torsion.? Thanks
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I have analyzed the frame for the load cases pushover, Gravity and Modal.I want to find out the Sa(Spectral acceleration) and sd (spectral Displacement) to convert the available pushover curve into capacity spectrum for finding out the performance point using ATC-40, procedure A.Can anybody please, Help me To get Participation Factor PF and modal mass ratio alpha directly from SAP2000 output Tables?(Can Participation factor be negative because in output table showing is correct?) (the frame is 2D, 4 storey, 4 Bays.)Thank You
