The shear resistance of foundation calculated by Staad Foundation Advanced version 8

Question

We have a question related to the shear resistance of foundation calculated by Staad Foundation Advanced version 8 in Eurocodes. 
 It gives somehow an incorrect result compared to our hand calculation. Please refer to attachment for detail. 
 Thank you! 
 One way shear Staad fdn - isolate footing.pptx

Rajat · Answer

I have tested your model in our latest version (08.00.00.00) and found there is some problem. 
 But in the test build of the upcoming version of STAAD Foundation Advanced, this problem is fixed and the program is calculating VRdc correctly. 
 Please find the attached output of SFA (Test Build ) and the clarification of the same. 
 VRdc Calculation is correct, but you need to add one more step, 
 if Vrdc>= Vmin x bw x deff 
 Here Vmin x bw x deff = 0.358 x3400 x 816 /1000 = 993 kN 
 So Crdc would be taken as 993 kN (not 836 kN) 
 Note- the snap attached in the following mail is shear for reverse direction, where Vmin x bw x deff = 0.358 x 4100 x816 /1000 = 1197 kN (Which is exactly matching with SFA result) 
 Hope this helps you. 
 Please let me know if you need some more assistance from my side. 
 Thank you.

Rajat · Answer

If you are interested for the current test build of STAAD Foundation Advanced, please let me know.

Kush · Answer

Hi Nguyen, 
 
Can you please upload your Foundation model as it will help us to investigate it further?