Modeling Pre and Post Tensioned Concrete

[Yahia Halabi]

Hello everyone;

I am working on modelling the post tensioned RC beams and columns. Could you please provide me with some useful references. I am reading the following paper, but I am wondering if anyone has the k files or requested from the author. 

[James Kennedy]

Dear Yaha,

 

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Recommend checking *CONSTRAINED_BEAM_IN_SOLID approach.

 

*CONSTRAINED_BEAM_IN_SOLID has been implemented. This feature is basically an overhauled constraint coupling between beams and Lagrangian solids that includes features that make it more attractive in some cases than *CONSTRAINED_ LAGRANGE_IN_SOLID, for example, in modeling coupling of rebar in concrete:

 

Chen, H., “An Introduction to *CONSTRAINED_BEAM_IN_SOLID”, FEA Information Solutions, Vol. 5, Issue 10. pp. 79-83, October, 2016.

 

http://www.feaiej.com/2017/feaiej_q1_2017.pdf

 

Solution options for including the initial tension in the tendons (static implicit, transient explicit, and Dynamic Relaxation solutions) and various methods for coupling the tensioned tendons to the concrete (shared nodes, *CONSTRAINED_LAGRANGE_IN_ SOLID, *ALE_COUPLING_NODAL_CONSTRAINT, and *CONSTRAINED_BEAM_ IN_SOLID) were given. The concrete was modeled using *MAT_159 (CSCM) with the default parameters for a concrete with unconfined compressive strength of 41.37 MPa:

 

Schwer, L.E., "Modeling Pre and Post Tensioned Concrete", 14th International LS-DYNA Users Conference, Dearborn, Michigan, June, 2016.

 

http://www.dynalook.com/14th-international-ls-dyna-conference/constitutivemodeling/modeling-pre-and-post-tensioned-concrete

 

Examples of rebar coupled to concrete (*clis and *cbis) are given here:

http://ftp.lstc.com/anonymous/outgoing/support/FAQ_kw/concrete/coupling_by_clis.k.gz and

http://ftp.lstc.com/anonymous/outgoing/support/FAQ_kw/concrete/coupling_by_cbis.k.gz

 

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Sincerely,

James M. Kennedy

KBS2 Inc.

May 26, 2026

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