参考答案: D
详细解析:
热轧带肋钢筋张拉程序:0 →初应力→ 1.05σcon (持荷5min) → 0.9σcon → σcon (锚固)
关于先张法预应力张拉操作时,热轧带肋钢筋张拉程序的说法,正确的是( )
A. 0 →初应力→ 1.03σcon (锚固)
B. 0 →初应力→ σcon (持荷 5min锚固)
C. 0 →初应力→ 1.05σcon (持荷 5min → 0 → σcon (错固)
D. 0 →初应力→ 1.05σcon (持荷5min) → 0.9σcon → σcon (锚固)
参考答案: D
详细解析:
热轧带肋钢筋张拉程序:0 →初应力→ 1.05σcon (持荷5min) → 0.9σcon → σcon (锚固)