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{"sheet":"%承载力计算-抗弯-深梁和短梁","index":0,"n_rows":44,"n_cols":15,"rows_kept":44,"merged":[[0,0,0,3],[0,5,0,14],[1,2,1,3],[5,2,5,3],[13,0,13,3],[21,0,21,3],[26,0,26,3],[31,0,31,3],[32,2,32,3],[33,0,33,3],[36,0,36,3],[43,0,47,3]],"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]
["ft＝",1.43,"(N/mm2)","混凝土抗拉强度设计值 ft",null,"ft","N/mm2",1.1,1.27,1.43,1.57,1.71,1.8,1.89,1.96]
["Ec＝",30000,"(N/mm2)","混凝土弹性模量 Ec",null,"Ec","N/mm2",25500,28000,30000,31500,32500,33500,34500,35500]
["HRB",400,"HRB(235,335,400) 纵筋强度等级",null,null,"强度","类型","HPB235","HRB335","HRB400"]
["fy＝",360,"(N/mm2)","纵筋抗拉压强度设计值 fy",null,"fy","N/mm2",210,300,360]
["Es＝",200000,"(N/mm2)",null,null,"Es","N/mm2",210000,200000,200000]
["α1＝",{"v":1,"d":"1.00"},null,"1.0<C50<内插<C80<0.94"]
["β1＝",{"v":0.8,"d":"0.80"},null,"0.8<C50<内插<C80<0.74"]
["ξb＝",{"v":0.5176470588235295,"d":"0.52"},null,"ξb＝β1/(1+fy/0.0033Es)"]
["αE＝",{"v":6.666666666666667,"d":"6.67"},null,"αE＝Es/Ec"]
[]
["深梁尺寸"]
["b＝",550,"(mm)","深梁宽度 b"]
["h＝",{"v":13.2,"d":"13.200"},"(m)","深梁高度 h"]
["ca＝",2640,"(mm)","深梁受拉纵筋配置范围 ca"]
["lc＝",{"v":18.6,"d":"18.600"},"(m)","深梁支柱中线距离 lc"]
["ln＝",{"v":15.7,"d":"15.700"},"(m)","深梁净跨 ln"]
["l0＝",{"v":18.054999999999996,"d":"18.055"},"(m)","深梁计算跨度 l0=min(lc,1.15ln)"]
["l0/h＝",{"v":1.3678030303030302,"d":"1.368"},null,"l0/h≤5时，按深受弯构件计算"]
["l0/h ≤ 5，属于深受弯构件，请继续输入数据！"]
["a＝",{"v":5.73,"d":"5.730"},"(m)","剪跨 a (若为均布荷载请输入0)"]
["λ＝",{"v":0.43409090909090914,"d":"0.434"},null,"剪跨比 λ=a/h(集中力) 或 l0/4(均布荷载)"]
["ψ＝",{"v":0,"d":"0.000"},null,"约束弯矩比绝对值 ψ(简支梁请输入0)"]
["ρbm＝",{"v":0.003276180555555556,"d":"0.328%"},null,"弯剪界限配筋率 ρbm=0.19λfc/(1+1.48ψ)/fy"]
["纵向钢筋：48φ25"]
["N＝",48,null,"纵筋根数 N"]
["φ＝",25,"(mm)","纵筋直径 φ"]
["As＝",{"v":23561.944875,"d":"23562"},"(mm2)","纵筋面积 As=N*(Pi*φ^2/4)"]
["ρ＝",{"v":0.003245446952479339,"d":"0.325%"},null,"纵筋配筋率 ρ=As/(b*h0)"]
["ρ≤ρbm，深梁为弯曲破坏！"]
["截面位置",0,"?(0,1)跨中截面请输入0，支座截面请输入1！"]
["《钢筋混凝土深梁设计规范》（CECS39:92）公式："]
["z＝",{"v":9.065499999999998,"d":"9.066"},"(m)","深梁的内力臂 z (根据截面位置和l0/h取值)"]
["Mu＝",{"v":76896.29205515249,"d":"76896"},"(kN-m)","抗弯承载力 Mu=fy*As*z"]
["《混凝土结构设计规范》GB50010 2002 公式："]
["as＝",1320,"(mm)","混凝土保护层厚度 as (根据截面位置和l0/h取值)"]
["h0＝",11880,"(mm)","梁有效高度 h0=h-as"]
["x＝",2376,"(mm)","受压区高度 x=max(fyAs/(α1fc*b),0.2h0)"]
["αd＝",{"v":0.8547121212121213,"d":"0.855"},null,"内力臂修正系数 αd=0.8+0.04*l0/h"]
["Mu＝",{"v":77516.19551508022,"d":"77516"},"(kN-m)","抗弯承载力 Mu=fy*As*αd*(h0-0.5x)"]
[]
["说明：\n1。若 l0/h>5，则说明构件不属于深受弯构件，不能应用本程序进行计算！\n2。若ρ>ρbm，则说明深梁为剪切破坏，不能应用本程序进行计算！\n3。深梁内力臂z和混凝土保护层厚度as本程序会根据规范自动选择公式！"]