LS-DYNA – Rotation of Steel Column and Base Plate in Composite Foundation under Pushover Loading
Mohamed Elkahki
Hello everyone,
I am working on a composite foundation model consisting of reinforced concrete with an embedded steel base plate and steel column. A horizontal pushover load is applied to the column.
For the contact definition, I used:
- Automatic Surface-to-Surface contact
- SOFT = 2 to reduce penetration
- Friction coefficient = 0.6
However, I am still facing an issue with the rotation of the steel column and base plate. During the analysis, both the column and base plate rotate, whereas they are expected to remain vertical and not experience this type of rotation.
Has anyone encountered a similar issue before? Could this be related to the contact definition, boundary conditions, constraints, or another modeling aspect?
Any suggestions would be greatly appreciated.
Thanks in advance.
l...@schwer.net
I assume the “Automatic Surface-to-Surface contact” is between the concrete and the base plate and beam?
I suggest you try using
*CONSTRAINED_SHELL_IN_SOLID for the concrete to base/beam
and
*CONSTRAINED_BEAM_IN_SOLID for the concrete to rebar.
--len
Thanks in advance.
--
You received this message because you are subscribed to the Google Groups "LS-DYNA2" group.
To unsubscribe from this group and stop receiving emails from it, send an email to ls-dyna2+u...@googlegroups.com.
To view this discussion visit https://groups.google.com/d/msgid/ls-dyna2/e8267aea-a0c9-4934-9125-ddf49f05f4ffn%40googlegroups.com.
Mohamed Elkahki
---
Hi Len,
For the plate, column, and concrete, I modeled all of them as solid elements.
The contact between them is defined as Automatic Surface-to-Surface.
The rebars are already modeled using beam elements and embedded inside the concrete solid.
Mohamed Elkahki
Yes, I meshed each component separately (concrete, base, and column).
Please find attached the complete model after compressing it
Thank you for your support and assistance.