We provide hints and tips to help you get started with the main programs RFEM and RSTAB.
How many mode shapes do I need to consider for an earthquake analysis?
In the module RF-DYNAM Pro you find those values together with the frequencies in the Dynamic Load Cases (DLCs) in a tab called 'Mode Shapes', please see attached picture. You can check whether or not you calculated a sufficient number of eigenvalues before starting the calculation, it might be that you have ti increase the number of eigenvalues.
After calculation you find the effective modal masses and the factors in Table 5.7 5.7 Effective Modal Mass Factors.
Have you found your question?
If not, contact us or send us your question via the online form.
Your support is by far the best
“Thank you very much for the useful information.
I would like to pay a compliment to your support team. I am always impressed how quickly and professionally the questions are answered. In the industry of structural analysis, I use several software including service contract, but your support is by far the best.”