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- Diaphragms – Different diaphragms should be defined and used for each tower.
- Loading – When automatic For seismic loading is applied, the option to Lump Lateral Mass at Story Levels should be unchecked through Define > Mass Source. This will generate similar lateral forces in each tower. ,do not use a Seismic Auto Lateral Load type , use User defined seismic loads or 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.
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NOTE: ETABS 2012 2013 includes a new feature which streamlines the modeling of multiple structures within the same file. |
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Answer: A structure may be modeled with a sloped roof by defining coincident gridlines and story elevations when the model is initiated. Story level should be defined at the top and bottom of the sloped roof. Additional instruction is available in the
tutorial, which is similar in topic.
See Also
- Ramps article