I was designing a Mat foundation ,the thickness of my raft which i wanted was 350mm thickness and the depth of the beam to be 900mm or 800 mm depth with width of 1000m, but when i run the design, the mat and the beam fail under punching shear even if i try to increase the depth of the beam to 1500mm.But when i increase the depth of my raft to be 900mm with or without beam inside it, the punching shear check will pass.
Iam using Staad Pro Update 5.I have attached my model i need a help what is the reason behind
55375.Structure1_foundation.sfa
04548.Structure1.STD
You currently have 4 separate mats in the job named "MAT". Change it so that you have only 1 mat per job. Thus, create 4 different jobs, with each job having only one mat.
Also, in the past few months, a few defects have been corrected in punching shear checks for mats. So, install the latest version - 9.6.1.74
A similar question from you was answered at the discussion titled TRUSS DESIGN IN STAAD PRO CONNECT EDITION
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Iam using Staad Pro Update 5,that means i have to switch to which version?yhe one you mentioned is within Update 7 or?if i have to switch to Update 7,update 7 has the problem in punching shear when it comes to Mat foundation,that is why i decided to switch back to Update 5 instead of Update 7
STAAD.Pro CONNECT Edition – V22 Update 8
How does Staad pro consider the depth of the beam on raft?the depth of the beam starts on the top of mat foundation or starts at the bottom of the mat?
Answer to the question posted on November 29 of position of the beam
If no offsets are specified, the line passing through the CG of the beam cross section coincides with the mid-thickness of the mat slab. In SFA, you cannot specify offsets to either the beam or the mat.