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Deflection of post-tensioned concrete slabs

Deflection of post-tensioned concrete slabs

Deflection of post-tensioned concrete slabs

(OP)
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.

RE: Deflection of post-tensioned concrete slabs

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?

RE: Deflection of post-tensioned concrete slabs

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

RE: Deflection of post-tensioned concrete slabs

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 (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.

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