Reinforcing Steel - Theory & Concepts - Materials Rebar Development Length

Types, grades, sizes, and properties of reinforcing steel bars (Rebars) used in concrete.

Vary rebar size, yield strength, concrete grade, and coatings to compute required embedment length ($l_d$) per ACI 318.

Bar Diameter ($d_b$)20 mm

Concrete Strength (fc)

Top Bar (Psi_t = 1.3)Epoxy (Psi_e = 1.2)

Embedment Provided600 mm

Rebar Yield ( $f_y$ ): Typical reinforcing bars yield at

415\text{ MPa}

(Grade 60) or

275\text{ MPa}

(Grade 40).

Pullout Simulator

Specimen Mounted

l_d = \left( \frac{f_y \cdot \psi_t \cdot \psi_e}{2.1 \cdot \lambda \sqrt{f'_c}} \right) d_b

Required vs Provided

747 mm vs 600 mm

FAIL (Insufficient Anchorage)

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