鋁料斷面檢核 (AA ADM 2025)

設定風壓 Wz = 250 kgf/m², 受風寬度 B = 1.2 m

線載重 W = Wz × B = 300.00 kgf/m = 2.942 kN/m

設計彎矩 Mu = W × L² / 8 = 2.942 × 3.5² / 8 = 4.50 kN-m

設計剪力 Vu = W × L / 2 = 2.942 × 3.5 / 2 = 5.15 kN

鋁材: 6063-T5 (Fty = 110 MPa, Fcy = 110 MPa, Fsy = 62 MPa)

強軸彈性斷面模數 Sx = 41.50 cm³

腹板剪力面積 Aw = 11.64 × 50% = 5.82 cm² (保守假設)

強軸慣性矩 Ix = 311.50 cm⁴

控制模式: 降伏控制 (Yielding)

標稱抗彎強度 Mn = 4.57 kN-m

容許抗彎強度 M_all = Mn / Ωb (1.65) = 2.77 kN-m

標稱抗剪強度 Vn = Fsy × Aw = 36.08 kN

容許抗剪強度 V_all = Vn / Ωv (1.95) = 18.50 kN

分析撓度 Δ = 5WL⁴ / (384EI) = 26.36 mm

容許極限 Δ_all = L / 175 = 3500 / 175 = 20.00 mm