{"text_format":"3","workbook":"xls","n_sheets":1,"sheets":["承载力计算-抗压-轴压-螺旋箍筋柱"],"not_rendered":{"images":1,"external_links":1,"defined_names":18},"read":"whole","date_system":"1900","formulas":"cached_only"}

{"sheet":"承载力计算-抗压-轴压-螺旋箍筋柱","index":0,"n_rows":23,"n_cols":15,"rows_kept":23,"merged":[[0,0,0,3],[0,5,0,14],[1,2,1,3],[3,2,3,3],[6,0,6,3]],"flags":["formulas_cached_only"]}
["钢筋和混凝土指标",{"$nulls":4},"混凝土强度及弹性模量"]
["C",30,"C?(20,25,30,35,40,45,50,55) 混凝土等级",null,null,"强度","类型","C20","C25","C30","C35","C40","C45","C50","C55"]
["fc＝",14.3,"(N/mm2)","混凝土抗压强度设计值 fck",null,"fc","N/mm2",9.6,11.9,14.3,16.7,19.1,21.1,23.1,25.3]
["HRB",335,"HRB(235,335,400) 纵筋强度等级",null,null,"强度","类型","HPB235","HRB335","HRB400"]
["fy＝",300,"(N/mm2)","纵筋抗拉压强度设计值 fy",null,"fy","N/mm2",210,300,360]
[]
["螺旋箍筋柱承载力计算"]
["Pi＝",3.14159265,null,"Pi=3.14159265"]
["φ＝",{"v":1,"d":"1.000"},null,"柱稳定系数 φ"]
["l0＝",{"v":3.2,"d":"3.200"},"(m)","柱计算长度 l0"]
["d＝",400,"(mm)","柱直径 d"]
["a＝",25,"(mm)","混凝土保护层厚度 a"]
["dst＝",22,"(mm)","全截面纵筋直径 dst"]
["n＝",8,null,"全截面纵筋根数 n"]
["dss1＝",8,"(mm)","箍筋直径 dss1"]
["s＝",50,"(mm)","箍筋间距 s"]
["As＝",{"v":3041.0616852000003,"d":"3041"},"(mm2)","全截面纵筋面积 As=n*Pi*dst^2/4"]
["dcor＝",350,"(mm)","核心混凝土直径 dcor=d-2*a"]
["Ass1＝",{"v":50.2654824,"d":"50.27"},"(mm2)","单根箍筋面积 Ass1=Pi*dss1^2/4"]
["Ass0＝",{"v":1105.3956903958106,"d":"1105.40"},"(mm2)","箍筋换算面积 Ass0=Pi*dcor*Ass1/s"]
["Acor＝",{"v":96211.27490625001,"d":"96211.27"},"(mm2)","核心混凝土面积 Acor=Pi*dcor^2/4"]
["α=",{"v":1,"d":"1.000"},null,"约束折减系数 α1.0-C50-C80-0.85"]
["Ncu＝",{"v":2656239.4358611754,"d":"2.656E+06"},"(N)","Ncu=0.9φ(fcAcor+fy'As'+2αfyAss0)"]