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Composite Beam Steel + Slab

Plastic moment capacity and stud count for steel-concrete composite beams per AISC 360-I, with full and partial composite action.

Inputs

Steel Beam d (mm)

Steel Area As (mm²)

Fy (MPa)

Slab thk t (mm)

Slab f'c (MPa)

Effective width be (mm)

Stud Qn (kN)

Beam Span L (m)

Stud Spacing approach

Method (AISC 360-I)

C_full = min(0.85·f'c·be·t , As·Fy).
n_studs = ceil(C_full / Qn) per half-span (×2 total for simple span).
For partial composite, scale C accordingly (0.75 here).
Plastic moment: Mn ≈ C·(d/2 + t/2 − a/2), a = C/(0.85·f'c·be).

Results

Concrete force C_conc—

Steel force T_steel—

Governing C—

Stress block a—

Studs per half span—

Total studs (simple beam)—

Plastic Mn—