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Debonding of Shear Friction Reinforcement
2

Debonding of Shear Friction Reinforcement

Debonding of Shear Friction Reinforcement

(OP)
Is it necessary to debond the shear friction reinforcement of the newly casting side of a construction joint of a tie beam???? Does is necessary to provide movement in the new cast??
thanks in advance

RE: Debonding of Shear Friction Reinforcement

If it slips in the concrete, it is not shear friction reinforcement.

RE: Debonding of Shear Friction Reinforcement

(OP)
Thanks hokie66. No movement are allowed. But in sometimes I have seen a debonding to a short extent(say 4 inch) from the interface and thereafter anchorage is provided

RE: Debonding of Shear Friction Reinforcement

You might have to define "tie beam" in order to get good answers for this. I am not sure why a tie beam would require longitudinal movement, nor am I sure how shear friction reinforcement would apply.

RE: Debonding of Shear Friction Reinforcement

(OP)
Sorry I have confused with movement joint with construction joint. No movement at all in long. dirn

RE: Debonding of Shear Friction Reinforcement

I think if there is some length of debonding in rebar used in a shear friction joint, you are altering the effective stiffness of the bars to keep the two concrete surfaces in tight contact so you begin to negate the efficiency of the shear friction joint. Similar to what hokie66 stated above - "if it slips it is not shear friction reinforcement" I might add: "if it stretches too much it is not shear friction reinforcement."

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