×
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

Dear Ansys users, I would like to

Dear Ansys users, I would like to

Dear Ansys users, I would like to

(OP)
Dear Ansys users,
I would like to know about seismic analysis ,I would appreciate, if anybody has done any seismic analysis and can spare the information. I have basically query as to how you can apply ground acceleration or velocity given as time history load to base nodes. And part two how do you constrain the base nodes.
Regrads,
ZALA B
email:zala@hotmail.com.

RE: Dear Ansys users, I would like to

Hello, br33zala!

First you will need some accelerograms... (on all three rectangular coordinate directions)
Secondary you will put the accelerations by using the same procedure like for gravity (it means by ACCEL command...).

The model will be constrained in the way that real is (you could use elastic foundation or not).

A problem is that: are all this acceleration (on x, y and z directions) in-phase or out-of-phase ?! Do not judge that as neglectable because it is of great importance!

I made seismic analysis but I use spectrum analysis. I've try to perform time-history but has no prove at all (because every earthquake is different as behaviour and the response of structure also).

Anyway if this is helpful I could say you how I have done this:

1) I use a different program to get an accelerogram from a spectrum
2) I apply the accelerograms by ACCEL commands

Finally, all was wasted time and no relevant results.

After that I performed Spectrum Analysis and everybody was happy....

Best regards,
Juzz

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