Hello,

I'm not so experienced in seismic analysis, so I've searched Caesar forum to find an answer for my question. Unfortunately can't find anything satisfactory. That's why this post has been made.

Question/Problem is:
In my project contract there is an information about Seismicity:

Seismic Design Requirement: 0.2g (horizontal direction) and 0.1g (vertical direction) for working stress design.

Can any one enlight me how to use those values to perform Static Seismic calculations in Caesar? As far as I know in ASCE or UBC I can find equations to calculate horizontal and vartical accelerations. So if those numbers are known can I use as an input to Caesar? Or maybe in your opinion those numbers means something different?

Thanks a lot for any answer,
Regards,
JK

Blondi,

You are right ASCE and UBC gives the equations to calculate g-factor.
In your case you know the g values then from project specification you can decide load case combination for sesmic static analysis.

Generally, you need to make as N-S with vertical direction & E-W with vertical direction.

Now you just click on uniform loads option in caesar define vector 1 & 2.
Click on g' values and add in the load case as per project specification.

Thank you very much for qiuck answer.