×
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

Timber-concrete composite beam in STAAD

Timber-concrete composite beam in STAAD

Timber-concrete composite beam in STAAD

(OP)
Hi,
I am trying to model a timber-concrete composite beam, which I've taken from an existing TCC bridge.

I'm trying to follow what the engineers stated in the journal:

"The structural analysis of the bridge deck was done using two dimensional
(2D) finite-element method (FEM) models run in the
finite elements software package SAP 20001 (CSI, 2004). The
timber and concrete components were modeled using simple
beam-type finite elements assuming linear elastic behavior in
both cases. The timber–concrete connection is modeled with six
degree of freedom linear spring elements, connecting two existing
nodes (one on timber and another on concrete) allowing deformation
in the longitudinal axis of the beam while the deformations
in the other two directions were restrained, as well as all
rotations. These conditions will enforce the same curvature in
both layers and avoid vertical discontinuity.

I started off with a truss and used beam elements for the concrete slab, timber beam and shear connectors. in staad I've defined the connection as steel rods with the start and ends having 6DOF with the global x direction given a slip modulus of 200kN/mm. I've also made the top and bottom beams ridged in the y direction but when I run analysis the beam completely fails and there is no sign of shear in the x direction?
Please help I have attached my input file.

Thank you
Toki

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