Special Seismic Design Data 1

[structech08]

Dear Guys,

In ETABS, when do we use the "Special Seismic Design Data"? This will increase the load combination if we click this data.
What are the advantages and disadvantages of using this data?

Thanks,

Structech08

 

[johnbridge231]

Dear Structech08,

When this option is selected, the program calculated (or user defined) Rho factor and the user defined DL Multiplier are automatically applied to program default design load combinations for American codes (ACI, AISC, UBC) that include contributions from earthquake loads.
Earthquake loads in this case are assumed to be all static loads of type QUAKE, all response spectrum, and all time history cases. These factors must be applied manually by the user for other design load combinations. ETABS calculates the Rho factor in accordance with Section 1617 of the 2000 International Building Code. The automatic calculation of the Rho factor depends on the floor area. ETABS calculates the floor area at each story level by summing the areas of the floor-type area objects at each story level.

Hope that has helped.

Regards,


Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-design.html

 

[structech08]

Hi Johnbridge231,

Thank you for your reply.

Regards,
Structech08

 

[johnbridge231]

You 're welcome!

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-design.html