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
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 - 184.108.40.206
A similar question from you was answered at the discussion titled TRUSS DESIGN IN STAAD PRO CONNECT EDITION
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
This kind of 4 column arrangement at expansion joint should be carried by a single beam in Mat foundation. How can i do that in Staad Advanced Foundation?
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.
Answer to the question posted on November 29 on which codes are available for designing beams
Will have to check, but I think ACI is the only code that is available for this currently.
Answer to the question posted on November 29 thru Dec 2 on expansion joint
SFA works best when you have one mat per job. Without significant testing, it would be hard to recommend the program for designing physically separate mats connected by beams.
What about this?