Earthquake (Seismic) Loading
The following two modules are available for seismic load evaluation.
FS-Seismic generates loading due to earthquake motion in accordance with the UBC/IBC/ASCE/EC3 and other similar national codes using the equivalent static lateral-force procedure.
- Load Case/Mass Case Conversion - Standard Load cases can be converted to Mass Definition Cases by using a mass conversion constant.
- Multiple Mass Cases - Any number of mass definition cases may be used to create the generated load cases.
- Directional Loading - The earthquake motion may be applied in any direction.
- Lateral Force - Vertical Distribution - Applies the lateral force vertical distribution in accordance with NBC including the Concentrated Top force.
- Fundamental Period Evaluation - Evaluates the fundamental period using the Raleigh-Ritz method. Simple alternative option to using FS-Frequency .
- Standard Load/Result Cases - The load case created can be pre-processed and post-processed like any other load case since they are not RMS type cases. Can be combined with other cases for P-Delta analysis.
FS-Dynamic. The Seismic Response module evaluates earthquake loading using the normal mode Response Spectra Analysis (RSM) method.
- Response Spectra Curves - NBC, Eurocode, API and user defined curves.
- Multiple Mass Cases - Any number of mass definition cases may be used to create the frequency cases. Standard Load cases can be converted to Mass Definition Cases by using a mass conversion constant.
- Directional Loading - The earthquake motion may be applied in any principal direction and simultaneously in the 6 degrees of freedom.
- Rotational Motion - Rotational base motion in accordance with Eurocode 8.
- Mass Participation - Mass participation evaluated for all included modes.
- Various Modal Combination methods - SRSS, CQC etc.
- Missing Mass - Pseudo mode to represent missing mass
- Single Mode or Signed outpout based on selected mode options
- Standard Result Cases - The load cases created can be post-processed like any other load case.