While it's easy to see achievements, other powerful stories can come from near misses that teach people that risk has its rewards.
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Even a failure makes a good story when it is positioned to focus on the learning experience derived from it.
长期荷载作用下，混凝土会发生徐变。轴心受压构件，随着荷载作用时间的延长，纵筋和混凝土的压应力会发生变化，变化的规律正确的是（ ）
A. 混凝土和钢筋压应力都减小
B. 混凝土和钢筋压应力都增大
C. 混凝土压应力减小，纵筋压应力增大
D. 混凝土压应力增大，纵筋压应力减小
轴心受压的普通箍筋柱，纵筋配筋率要小于最大配筋率。如果纵筋配筋率大于最大配筋率，则会（ ）
A. 导致柱在轴压力作用下变形加大
B. 导致长期荷载作用下混凝土开裂
钢筋混凝土轴心受压短柱和长柱，哪个因为初始缺陷的存在，受压承载力会降低
A. 短柱
B. 长柱
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