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ÇYTHYE 2018 Combined Axial + Bending

Interaction equations 11.1a / 11.1b · B1 moment amplification · LRFD (φ-based) demand-capacity ratio (DCR)

Inputs

Required forces (from analysis); available capacities (from section tools).

Required Axial Pr kN

Required Mrx kN·m

Required Mry kN·m

Available Axial φPc kN

Available φMcx kN·m

Available φMcy kN·m

B1 amplification (optional — leave 0 to skip):

Cm factor

0 = skip B1

Pe1 kN

Euler buckling load

Pr / φPc (axial ratio)—

B1 amplification factor—

Amplified Mrx [kN·m]—

Governing equation—

DCR (≤ 1.0 OK)—

Denklem 11.1aPr/Pc ≥ 0.2: Pr/Pc + 8/9·(Mrx/Mcx + Mry/Mcy) ≤ 1.0

Denklem 11.1bPr/Pc < 0.2: Pr/(2Pc) + (Mrx/Mcx + Mry/Mcy) ≤ 1.0

Denklem 11.3B1 = Cm/(1 − Pr/Pe1) ≥ 1.0 (moment amplification, non-sway)

VERIFYÖrnek 11.4 kılavuz: Pr=1320, Mrx=88.3, Mry=34.0 kN·m; Pc=2559.8, Mcx=462.6, Mcy=215.1 → DCR≈0.86.

Engine: steel-d.js ext. · TR-CYTHYE-2018-STEEL.v1 · Date:

Preliminary calculation tool. Final design requires the full official text and a licensed engineer.