预应力混凝土后张法构件中,混凝土预压前第一批预应力损失&sigma;<sub>lI</sub>应为()

A.&sigma;<sub>l1</sub>+&sigma;<sub>l2</sub> B.&sigma;<sub>l1</sub>+&sigma;<sub>l2</sub>+&sigma;<sub>l3</sub> C.&sigma;<sub>l1</sub>+&sigma;<sub>l2</sub>+&sigma;<sub>l3</sub>+&sigma;<sub>l4</sub> D.&sigma;<sub>l1</sub>+&sigma;<sub>l2</sub>+&sigma;<sub>l3</sub>+&sigma;<sub>l4</sub>+&sigma;<sub>l5</sub>

时间:2023-12-18 12:26:15

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