螺旋箍筋柱承载力计算Pi＝3.14159265Pi=3.14159265fc＝15(N/mm2)fcfy'＝245(N/mm2)fy'φ＝1.000φl0＝3.200(m)l0d＝400(mm)da＝25(mm)adst＝22(mm)dstn＝8ndss1＝8(mm)dss1s＝50(mm)sAs＝3041(mm2)As=n*Pi*dst^2/4dcor＝350(mm)dcor=d-2*aAss1＝50.27(mm2)Ass1=Pi*dss1^2/4Ass0＝1105.40(mm2)Ass0=Pi*dcor*Ass1/sAcor＝96211.27(mm2)Acor=Pi*dcor^2/4Ncu＝2.730E+06(N/mm2)Ncu=φ*(fc*Acor+fy'*As'+2*fy*Ass0)