RF‑/DYNAM Pro - Forced Vibrations and RF‑/DYNAM Pro - Equivalent Loads perform the multi-modal response spectrum analysis. What are the differences?

Answer

RF-/DYNAM Pro - Equivalent Loads performs a multi-modal response spectrum analysis with the export of equivalent loads.

1) The static equivalent loads are calculated and exported to load cases. This happens separately for each mode shape and each direction of excitation.

2) The total earthquake forces can be determined easily for each mode shape.

3) The accidental torsional actions can be considered automatically.

4) The load cases are calculated in the main program RFEM/RSTAB. Possible nonlinearities are taken into account; the calculation parameters of the load cases can be adjusted (for example, the calculation according to the second-order analysis, deactivation of nonlinearities).

5) The stiffness modifications from the natural vibration cases (NVCs) are not transferred to the load cases automatically.

6) The result combinations are generated individually for each excitation direction (combined modal responses with SRSS or CQC) and for the combination of results from different excitation directions (SRSS, 100%/30% (40%)).

7) The sign-dependent results are available on the basis of the dominant mode shape, which results in unique RCs.

8) The results can be reproduced step by step.

In RF‑/DYNAM Pro - Forced Vibrations, a multi-modal and multi-point response spectrum analysis is performed.

1) A building can be subjected to the excitations by different response spectra at different supports and in different directions.

2) The calculation and superposition are carried out within the RF‑/DYNAM Pro add‑on module. The calculation is linear, nonlinearities are not taken into account. The stiffness modifications from the ESFs are applied.

3) The result combinations of the superimposed results are only exported.

Keywords

Response spectrum Earthquake Dynamic analysis Difference

Reference

Contact us

Did you find your question?
If not, contact us via our free e-mail, chat, or forum support, or send us your question via the online form.

(267) 702-2815

info-us@dlubal.com

RSTAB Dynamic Analysis
DYNAM Pro - Equivalent Loads 8.xx

Add-on Module

Seismic and static load analysis using the multi-modal response spectrum analysis

Price of First License
580.00 USD
RSTAB Dynamic Analysis
DYNAM Pro - Forced Vibrations 8.xx

Add-on Module

Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis

Price of First License
1,120.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro - Equivalent Loads 5.xx

Add-on Module

Seismic and static load analysis using the multi-modal response spectrum analysis

Price of First License
760.00 USD
RFEM Dynamic Analysis
RF-DYNAM Pro - Forced Vibrations 5.xx

Add-on Module

Dynamic and seismic analysis including time history analysis and multi-modal response spectrum analysis

Price of First License
1,120.00 USD