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【单选题】
已知钢筋混凝土矩形截面,受拉区配置钢筋,根据计算,承载力为Mu1,同时相对受压区高度等于界限相对受压区高度,增加受拉区钢筋后,承载力为Mu2。则Mu1和Mu2关系为( )。
A.
Mu1>Mu2
B.
Mu1=Mu2
C.
需要根据计算判断
D.
Mu1
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