Punching Shear Check for Raft Foundation

Punching Shear Check for Raft Foundation

Please ensure that FE Raft Foundation Analysis must be completed before performing punching shear check, the checking cannot be performed in the absence of soil stress data.
Please follow steps below to perform punching shear check in foundation level:
  1. In Storey 0, select/ multiple select the columns.
  2. Click  Column Punching Check  under the Column tab
  3. The punching check for raft foundation dialog is similar to the punching check for wall and columns, the only difference is there are an extra column "Soil Pressure" and an input field for the value of "Tributary Area of Column Ave Soil Pressure" in punching check for raft foundation dialog. 

    Adjust the settings here if necessary. For other parameters and settings in this dialog, please refer to Column Punching Check.
  4. Please enter the value of Tributary Area offset in the input field and the soil pressure will be automatic detected. 
    5. "Tributary area offset" allows you to adjust soil pressure by adjusting offset distance from the edge of the column. If you want the column to cover more it's tributary area, you can increase the value in this input field and soil pressure will adjust accordingly.
  5. Click Calculate and result will be generated in report format.


The raft can similarly be designed by accessing the FE Analysis Post Processor and by looking at the As(d) contours for bending.  ProtaStructure does not give the shear contours (so this will need to be separately checked if deem critical). 

You can perform punching shear check for the columns & discrete walls:  Column Punching Check



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