RAM Concept: Precompression values on Design Strips

HI, Can anyone clear my following queries from RAM Concept

1) The Centroid stress plots under the Rule Set design reflects the Precompression forces in the slab ?

2) We have noticed that the precompression value reduces if we put an additional short tendon and stop midway in the slab rather than putting it till the end. When we remove this short tendon, it regains back its precompression values. This shouldn't happen in reality as any additional tendon should help the slab to attain more precompression force. We believe it is because the slab elements are meshed as nodal points and when the short tendon ends, due to difference is displacement between two nodal plates( one with the tendon and one without the tendon), it takes the average of two location and displays the precompression force at that point. Is it true?

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  • I'm also curious about the precompression plans under balance loading.  I'm trying to verify that the tendons I add to the beams do precompress the 1-way slabs that span in between the beams.  Right now I'm seeing tension at midbay of the slabs, and the precompression drops off steeply from the beam centerlines.  I'm thinking this may be due to the restrain from the supports.  Is there a way of looking at the precompression due to the tendons, restraint from the supports, and from bending moment separately?

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  • I'm also curious about the precompression plans under balance loading.  I'm trying to verify that the tendons I add to the beams do precompress the 1-way slabs that span in between the beams.  Right now I'm seeing tension at midbay of the slabs, and the precompression drops off steeply from the beam centerlines.  I'm thinking this may be due to the restrain from the supports.  Is there a way of looking at the precompression due to the tendons, restraint from the supports, and from bending moment separately?

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