Etabs multiple towers
Etabs multiple towers
(OP)
may i know if there is any way in etabs to find out the model time periods of the two buildings separately in a multiple tower file.
The two buildings are modeled in separate grids in multiple tower option
The two buildings are modeled in separate grids in multiple tower option






RE: Etabs multiple towers
I doubt,if Etab/any software (based on stiffness matrix) could distribute the auto lateral seismic force accurately between floors; though it can handle multiple towers in one file.
Nonethelessly; you can ve some useful information regarding the topic at below site.
https://wiki.csiamerica.com/display/etabs/ETABS+Mo...
What should be considered when modeling multiple towers in the same file?
Answer: A few notes which concern the modeling of multiple towers in a single file include:
Diaphragms – Different diaphragms should be defined and used for each tower.
Loading – For seismic loading ,do not use a Seismic Auto Lateral Load type , use User defined seismic loads , perform a Response Spectrum or Time History analysis instead.
Vertical systems – In terms of height, unbraced length, response, and all other factors, design of columns and shear walls should proceed as normal.
Cheers! -VH
RE: Etabs multiple towers
RE: Etabs multiple towers
Theoretically, you could create a different load combination for the mass of each tower. That way, you run the eigensolution with just mass of the one tower and you get only the modes for that tower.
RE: Etabs multiple towers
Looking at the mode shapes and mass participation should give you a good idea of the periods associated with each superstructure.