Deflection of post-tensioned concrete slabs

[hockley]

I am interested to know if there is a commercially available 3D finite element package that is able to calculate the long-term deflections of post-tensioned concrete slabs.

 

[fkmeyers]

I know that the package we use (NEiNastran) supports prestress analysis in most of the solutions and also has support for tension-only cable elements which can have different types of preload. When you say long-term deflections do you mean creep?

 

[chudiume]

Ram Concept is a fantastic FE program for post-tensioned and RC concrete. Does cracked section anaylysis or contour LT deflection calculations

 

[crisb]

http://www.tnodiana.com

 

[rapt]

chudiume,

Have you looked at how RAM Concept does its deflection calculations.

Unless it has changed very recently, cracking is defined by the designer as a factor of gross inertia for deflections, it is not calculated based on the actual stresses at each cross-section. Long Term effects are by a factor normally used only for RC design and then a very inaccurate factor anyway even for that.

You will get your best deflection estimates for RC and PT slabs from RAPT 2D (

http://www.raptsoftware.com)

program which does a full cracking analysis and long term creep and shrinkage analysis for both one way and two way members.