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Safe output results for punching shear ratio

Safe output results for punching shear ratio

Safe output results for punching shear ratio

(OP)
Dear Esteemed Fellows users of Safe program:
Most international codes (including ACI, BS, and IS) consider the impact of moments when calculating the punching shear stress in the Flat-Slabs.
Referring to the attached picture, Is there any mistake in the sign of the considered moments in the punching result sheet and the correspondent moments signs appeared in the output results of the considered column.
Remember that the main axes of the considered column are the default ones of Safe; axis 2 is parallel to the X axis and the axis 3 is parallel to the axis Y.
The attached picture is a snapshot of the example BS 8110-97 RC-PN-001.FDB came with Safe-Verification-Design Examples.
Your participation and feedback are deeply appreciated, thank you very much indeed.

RE: Safe output results for punching shear ratio


Which column is it ?

Additionnal note : I may be mistaken, but I always tought that Mu2 & Mu3 were including the gamma (shear transfert) factor. i.e : Mu2 = y * M2.

RE: Safe output results for punching shear ratio

The values shown in the design output are not the the same as the column end moments, as pico said they already include proportioning for flexure/shear and also eccentricity to centroid of section.

In general SAFE is rubbish for calculating punching shear, be very skeptical of the design checks for this.

RE: Safe output results for punching shear ratio

(OP)
PicoStruc;
Thank you for your replay sir, The considered column is labeled "6", as it is shown in table below the attached file. Also, the BS code uses the 100% output moments in its approach. This is not the case of others codes,ACI, IS and others which use proportioning of the output moments. Anyway, my point question about the sign of the moments used between the shear punching calculation sheet and the outputs table of the considered column.
Best Regards.
bookowski;
Thank you for your replay sir, If you refer the Safe-Manuals-SAFE Verification-BS 8110-97 RC-PN-001 Slab Punching Shear Design:
The SAFE results show an exact comparison with the independent results.Page 207.
Best Regards.

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