How do I calculate outward busting forces in a circular concrete pile at positions of cracked longitudinal rebars. This column is 800mm dia with 15No dia 32mm bars to enable splicing. The pile is 23m long. The rebar has 2 spices. Links are a spiral dia 16mm bars at 250mm pitch. Because there are so many bars (15No) this makes the tie bar angle so wide that trying to resolve the forces seems to require quite some substantial additional links to counter the outward busting force. Is it allowed to just resolve the forces in this way and provide as much tie reinforcement as is necessary? Is it possible for someone to help me with an example of how to calculate the busting force or guide me in the right direction? Thank you
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