Prestressing Strands, Wires, and Bars

16 Aug.,2023

 

fps based on strain compatibility, values of fps calculated in accordance with Eq. (20.3.2.3.1) shall be permitted for members with fse ≥ 0.5fpu. (20.3.2.3.1)

where γp is in accordance with Table 20.3.2.3.1.

fps by Eq. (20.3.2.3.1), (a) and (b) shall be satisfied.

If compression reinforcement is considered for the calculation ofby Eq. (20.3.2.3.1), (a) and (b) shall be satisfied.

d' exceeds 0.15dp, the compression

(a) Ifexceeds, the compression reinforcement shall be neglected in Eq. (20.3.2.3.1).

(b) If compression reinforcement is included in Eq. (20.3.2.3.1), the term

shall not be taken less than 0.17.

Table 20.3.2.3.1—Values of γp for use in Eq. (20.3.2.3.1) fpy/fpu γp ≥ 0.80 0.55 ≥ 0.85 0.40 ≥ 0.90 0.28

As an alternative to a more accurate calculation ofbased on strain compatibility, values ofcalculated in accordance with Eq. (20.3.2.3.1) shall be permitted for members with bonded prestressed reinforcement if all prestressed reinforcement is in the tension zone and

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