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["圆形截面性质计算"]
["R＝",10,"(mm)","矩形宽 b"]
["R0＝",0,"(mm)","空心宽 b0"]
["A＝",{"v":314.159265,"d":"314"},"(mm)","截面面积 A"]
["Ix＝",{"v":7853.981625,"d":"7.8540E+03"},"(mm4)","惯性矩 Ix=Pi*(2R)^4/64"]
["ix＝",{"v":5,"d":"5.0000E+00"},"(mm)","回转半径 ix=sqrt(Ix/A)"]
["Wx＝",{"v":785.3981625,"d":"7.8540E+02"},"(mm3)","截面抵抗矩 Wx=Ix/h*2"]
["γ=",78.5,"(kN/m3)","材料重度 γ(钢材为78.5kN/m3)"]
["G＝",{"v":0.024661502302500003,"d":"0.0247"},"(kN/m)","每延米自重 G=Aγ"]