×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Response spectrum declaration

Response spectrum declaration

Response spectrum declaration

(OP)
In both ETABS and SAP2000, when I declare response spectrum case data, how to declare scale factors, do I put scale factors in both x and y direction, or must I declare two seismic functions in x direction with it is scale factor, and the same in y direction.

thanks.

RE: Response spectrum declaration

you should declare two functions, every direction must has its one function with its own scale factor
you may have force apllied in two directions in same function if you have to consider orthognal effects

RE: Response spectrum declaration

(OP)
hello and thanks dawn836,

it is more correct if we proceed with the second proposition , so we can have orthogonal effects, do not we.

thank you

RE: Response spectrum declaration

Sellsam

Yes, if your structure calls for orthogonal effects. Otherwise, you may need to define in two principal direction of structure to understand the distribution of modal shear.

Murali

RE: Response spectrum declaration

(OP)
thanks murali.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources