Simplified Reinforced Concrete Design 2015 Nscp Pdf -

National Structural Code of the Philippines (NSCP) 2015 revolutionized reinforced concrete design in the Philippines by transitioning from the Working Stress Design (WSD) and older Strength Design methods to the Ultimate Strength Design (USD) approach, closely aligning with the ACI 318-14 international standard. 1. Shift to Strength Design

  • For students: Use the Whitney Approximation.
  • For designers: Read the interaction diagrams in the back of the Gillesania PDF (Appendix C).
  • Key change 2015: Minimum eccentricity is no longer a flat 0.1h; it depends on axial load magnitude.

Simplified PDFs often provide pre-calculated load tables for typical bay sizes. Simplified Reinforced Concrete Design 2015 Nscp Pdf

1. The Shift to $f'c$ (Concrete Strength)

  • Vc = 0.17 λ √f’c * bw * d (in SI units)
  • If Vu (factored) > φVc (φ=0.75), provide stirrups.
  • Stirrup spacing:
    1. Factored load: Wu = 1.2(20)+1.6(15) = 48 kN/m.
    2. Mu = Wu L² / 8 = 48*36/8 = 216 kN·m.
    3. Assume ρ = 0.005 (simplified midrange), b = 250mm, d = 400mm (approx L/15).
    4. Check ρ_min = 1.4/415 = 0.00337; ρ_max = 0.75*(0.85210.85/415)*(600/(600+415)) ≈ 0.018. ρ=0.005 OK.
    5. Compute a = As fy / (0.85 f’c b) – iterative, but simplified pdf gives direct As = Mu/(0.9fy0.9d) approximate = 216e6/(0.9415360) ≈ 1600 mm².
    6. Provide 4-20mm bars (As=1257 mm²? No, actually 4-20mm=1256 too low, so 5-20mm=1570 OK). Simplified PDF includes a bar area table for quick selection.
    7. Check development length via simplified formula: Ld = 0.18415/(1√21)*20 ≈ 326mm. Beam span = 6000 mm – support width, OK.

    Designers focus on three primary limits to ensure safety and serviceability: Simplified Reinforced Concrete Design | PDF - Scribd National Structural Code of the Philippines (NSCP) 2015

    • Compute nominal shear Vn and provided shear capacity (Vc + Vs) against Vu/φ.
    • Provide shear reinforcement (stirrups) if Vu > Vc.

    Using the simplified design procedure outlined above, the following design calculations can be performed: For students: Use the Whitney Approximation