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【单选题】
下列叙述正确的是 ( )。A.
预应力混凝土构件中,计算求得的预应力总损失后构件不应小于100N/mm 2 ;先构件不应小于80 N/mm 2
B.
为减少混凝土收缩和引起的预应力损失,由预应力在构件中产生的 混凝土预压应力值不应小于施加预应力时混凝土的立方体抗压强度
C.
控制应力越大,预应力钢筋的应力松弛损失也越大
D.
验算后张法预应力混凝土构件端部锚具下混凝土的局部受压承载力时,其局部压力设计值拉控制力
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