×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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!

*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

About Vertical Component of Earthquake.

About Vertical Component of Earthquake.

About Vertical Component of Earthquake.

(OP)
I need some information about the effect of vertical component of earthquake and records of some earthquake (both vertical and horizental component)

RE: About Vertical Component of Earthquake.

Well, it used to be that 1/3 of the horizontal acceleration was used for the vertical direction, however, since Northridge produced very high vertical accelerations I'm not sure what the codes have finally developed for this direction/application.

As for records, I assume you wish strong-motion records or accelograms and I'm not sure what agencies out there record that kind of data for public use.  Try the COSMOS website.  I don't know the address so just search using the acronym above.

RE: About Vertical Component of Earthquake.

We here (Spain) with less critical earthquakes are recommended to use 0.5 times the horizontal basic ground acceleration.

RE: About Vertical Component of Earthquake.

As Qshake said the vertical component of earthquake generally would be of order 1/3 of horizontal coponent. But it is not a standard value since the earthquakes I have studied, for example Kobe, Northridge, Chalfant, whitter field and many more, the vertical componant is in comparision with that of horizontal motion, few cases it exceeded the horizontal motion.

The vertical component is not at danger, b'coz the stuructures designed to the respective building codes have adeaquate factor of safety against vertical loads and the additional axial load arising from vertical motion will be easily taken care off by this factor of safety.

The vertical motion produced cosiderable effect on thin-walled structures susceptible to local buckling. In this case the local buckling coupled with the additional axial load due to vertical ground motion produces considerable damage during an event of severe earthquake.

RE: About Vertical Component of Earthquake.

For dynamic analysis of buildings in the U.S. (per 1997 UBC 1631.2.5), the vertical component of ground motion may be defined by scaling corresponding horizontal accelerations by a factor of two-thirds.  For near-source sites, site specific data is required.

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! Already a Member? Login



News


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close