punching shear of pile caps
punching shear of pile caps
(OP)
Hi, when checking against punching shear at 1.5d zone (according to UK code), but at whatever distance your code states. How do you deal with overlapping zones, say you have 4 piles and all perimeters overlap?






RE: punching shear of pile caps
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RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
It seems to me that if the zones overlap, you don't really have punching shear, but rather beam shear. With 4 piles, you would use the full pile cap width and effective depth. Check punching shear under the column.
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
The overlapping condition can be eliminated (for coupling piles) by adjust the pile spacing farther apart (note: the two cones are in opposite directions vertically). I wouldn't worry too much about overlap in this case, draw cone diagram with stresses along cone surfaces, you would know why.
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
RE: punching shear of pile caps
However, your design is likely governed by one way action, treating the pile cap as rigid beam, supported by structures above, with concentrated loads from piles, and soil reaction.
Strut-tie method is strongly recommended for this case.