모두CBT
다음 H\rm HH형강(SM355\rm SM355SM355) 단면의 전소성모멘트(MPM_PMP)는 얼마인가?xH-440×300×10×20
1,036kN⋅m\rm 1,036kN\cdot m1,036kN⋅m
700.8kN⋅m\rm 700.8kN\cdot m700.8kN⋅m
575kN⋅m\rm 575kN\cdot m575kN⋅m
919.8kN⋅m\rm 919.8kN\cdot m919.8kN⋅m
소성단면계수 Zx=b tf(H−tf)+tw4(H−2tf)2Z_x=b\,t_f(H-t_f)+\dfrac{t_w}{4}(H-2t_f)^2Zx=btf(H−tf)+4tw(H−2tf)2=300(20)(420)+104(400)2=2,520,000+400,000=2,920,000=300(20)(420)+\dfrac{10}{4}(400)^2=2{,}520{,}000+400{,}000=2{,}920{,}000=300(20)(420)+410(400)2=2,520,000+400,000=2,920,000mm³Mp=FyZx=355×2,920,000=1,036×106M_p=F_y Z_x=355\times2{,}920{,}000=1{,}036\times10^6Mp=FyZx=355×2,920,000=1,036×106N·mm ≈1,036\approx1{,}036≈1,036kN·m
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