Prestressed Concrete Cylinder Pile Analysis

[JohnFarley]

I'm looking for recommendations for a methodology to determine the structural and geotechnical capacity of existing spun-cast prestressed concrete cylinder piles. I need both the full-section (like-new) capacity and the capacity assuming longitudinal cracking in the pile.

Thanks.

 

[six06]

Hello,

The geotechnical capacity is not affected by the presstressing of the pile. You can analyze it as a concrete square pile for geotechnical purposes.

For the structural capacity i would model it using non linear moment curvature (or EI vs moment) relations. That way you can account for the EI reduction for the cracked case.

 

[JohnFarley]

Thanks, six06. I'll give that a shot.

I assume your answer would still hold when the pile is in a pile bent configuration, i.e., significant exposed length above mudline.