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{"sheet":"钢管混凝土柱承载力计算","index":0,"n_rows":12,"n_cols":4,"rows_kept":12,"merged":[[0,0,0,3]],"flags":["formulas_cached_only"]}
["钢管混凝土柱承载力计算"]
["Pi＝",3.14159265,null,"Pi=3.14159265"]
["fc＝",15,"(N/mm2)","fc"]
["fy＝",245,"(N/mm2)","fy"]
["l0＝",{"v":3.2,"d":"3.200"},"(m)","l0"]
["dc＝",500,"(mm)","dc"]
["t＝",10,"(mm)","t"]
["φ＝",{"v":0.8218427660744588,"d":"0.822"},null,"φ=IF(l0/dc>4,1-0.115*sqrt(l0/dc-4),1)"]
["Aa＝",{"v":15707.96325,"d":"15707.96"},"(mm2)","Aa=Pi*dc*t"]
["Ac＝",{"v":196349.54062500002,"d":"196349.54"},"(mm2)","Ac=Pi*dc^2/4"]
["θ＝",{"v":1.3066666666666666,"d":"1.31"},null,"θ=(Aa*fy)/(Ac*fc)"]
["Nu＝",{"v":7954311.812702125,"d":"7.954E+06"},"(N/mm2)","Nu=φ*fc*Ac*(1+2*sqrt(θ))"]