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KZ1 中柱尺寸 750*700 顶层层 3500 , 500 ,箍筋为 A10@100/200 ,柱内纵筋是 24B25 ,二级抗震,板厚 100 ,保护层 20 ,关于顶层箍筋的描述正确的是( )
A.
顶层的箍筋加密区长度是 2max[3500/6,Hc,500]
B.
顶层的箍筋加密区长度是 2max[3500/6,Hc,500]+100
C.
顶层的箍筋根数是 {[2max[3500/6,Hc,500]-50]/100}+ { 3000-[2max[3500/6,Hc,500]}/200}+1
D.
顶层的箍筋加密区根数计算 {[2max[3500/6,Hc,500]+500-50]/100}+1