...
| Info |
|---|
NOTE: The option to export response-spectrum load cases from ETABS |
...
Load patterns
The load patterns relevant to response spectrum imported into SAFE will be:
...
into SAFE becomes available once analysis is run in ETABS. Cases may then be imported into SAFE. |
Load pattern
The response-spectrum load patterns imported into SAFE include:
- SPECXECC represents linear-static loads which result only from spectrum eccentricity. One will be imported per spectrum case, regardless of whether or not eccentricity is specified. If no eccentricity is specified, values will be zero.
- MODAL 1, 2, .. ., i, .. . n - These are represents the load vectors for every mode and n is the number of modes in ETABS modelassociated with each of the n modes.
Load
...
case
The response-spectrum load cases relevant to Response spectrum imported into SAFE will beinclude:
- SPECXECC represents linear- Linear static case loads which result of only from spectrum eccentricity, one for each spectrum case.
- MODAL - Load type case Modal, this is a load vector of modal loads.
- SPECX - Response spectrum case, one for each spectrum case imported.
...
- . One will be imported per spectrum case, regardless of whether or not eccentricity is specified. If no eccentricity is specified, values will be zero.
- MODAL represents the load vectors associated with each of the n modes.
- SPECX represents the response-spectrum case. One will be imported per spectrum case.
Additional comments
- When using default load combinations, spectrum cases will be combined by assuming
...
- a QUAKE
...
- load type.
- Load combinations which include response-spectrum load cases will be defined
...
- with an ENVELOPE load type. Maximum and minimum values will be associated element-force results.
- Static load cases from spectrum eccentricity will be imported and flagged as
...
- OTHER
...
- load type
...
- . These cases may be manually added to load combinations as
...
- necessary.
- For
...
- foundation analysis
...
- and design, nonlinear uplift cases may not be converted from spectrum combinations because response-spectrum analysis is a linear formulation. As an alternative, spectrum story forces may be applied within ETABS manually as a lateral load case, then response may be exported to SAFE for foundation design.