×
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

Concrete Slab Design using STAAD (Polygonal Meshing)

Concrete Slab Design using STAAD (Polygonal Meshing)

Concrete Slab Design using STAAD (Polygonal Meshing)

(OP)
Hi All,

(This post is moved from Structural engineering other technical topics Forum: thread507-364507: Concrete Slab Design using STAAD (Polygonal Meshing))

I have a concrete roof slab with a few circular openings and rectangular openings, and it is framed into concrete walls on all sides. The roof slab needs to be designed for HS-20 (highway truck) loads. I am using Polygonal Meshing in STAAD to create triangular plate elements.

Question:
1) Has anyone used the Global Moment outputs given in STAAD? I couldn't find any documentation on how its calculated, and whether it follows the Wood-Armer formula (add Mxy to Mx and My). If you don't use global moments, how do you design orthogonal reinforcement? Keep in mind triangular plates have their local axes all over the place.

2) Do you typically use plate center stress or plate corner stress? I usually use plate center stress. I think plate corner stress can be over conservative and there is no need to design for the moment occurring at the exact centerline intersections. However, this post (http://communities.bentley.com/products/structural...) makes think twice. What do you use and what is your reasoning?

Thanks!

RE: Concrete Slab Design using STAAD (Polygonal Meshing)

I use STAAD PRO to design reinforced concrete tanks, bridges, and box culverts. I use plate elements to model these in 3 dimensions the program. The program gives Mx , My with the area rebar in in^2/ft of width in both directions. I have had good results with actual tanks, bridges, and box culverts that were built with these designs.

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