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

parking garage

parking garage

parking garage

I'm designing a two-story underground parking garage using precast tees, and exterior cast-in-place walls. My first thought was to design the exterior walls as restrained walls at the base, second level and the roof. But is it possible to introduce an axial load into the precast floor tees?  Can the precasters accomodate this loading?
If this can't be done, I'll design the walls as a retaining wall with butresses, but would rather not.

RE: parking garage

I would have thought it was easy enough to design the precast tees to take an axial load. The detailing of their fixing would need to take into account this axial load. Also the temporary condition would need to be taken care of before the Tees are in place.

Carl Bauer

RE: parking garage

We just finished a parking garage design which sunk into a hillside creating the need for the precast girders and tees to take axial load (in the diaphragm of the deck) to resist lateral earth loads.  At first, the precaster we were working with tried to avoid this, preferring to just design his members without axial.  Eventually, they did accommodate it...we carefully indicated the earth loads on our plans for their use.

The connections between girders, cast walls, and double tees may have to be altered to take these forces into account.

RE: parking garage

The problem with most of the big span structures I see mainly in too few vertical supports...this may have caused the failure at some parking in the Northridge earthquake. But most surely is more worrying the  hammering of the floor mass on the supporting columns (here some walls as well) than the feasibility of their (beams') buckling.

In this case I would also consider the vertical unloading of the floors under seismic loads...it might create a unsafe condition.

RE: parking garage


I've been to a short seminar about Northridge where the speaker indicated some examples of failed parking garages.  These apparently failed because the designer did not take into account second order Pdelta forces from the interior columns which were heavily loaded.

RE: parking garage

JAE, out of curiosity how long was the garage out of the hillside?  I've seen some bad problems with such an animal primarily due to expansion/contraction and bad details.

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


White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now
White Paper - Medical Device Design Control
Medical device product development is a highly integrated and regulated process. Implementation of a requirements tracking solution requires attention to a variety of nuanced topics. When presented with the task of tracking the many concept relationships in a project of this type, the initial software solution of choice tends to be a two-dimensional text systems. Download Now

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