赵  勇  黄鼎业    （同济大学预应力研究所  上海 200092）

    李云贵  陈岱林  范美玲    （中国建筑科学研究院结构所  北京 100013）

[提要]  提出了采用压弯模式计算预应力混凝土梁板构件正截面抗弯承载力的方法。该方法将平均有效预应力产生的综合弯矩和综合轴力视为荷载作用效应，将预应力增量部分视为抗力。该方法概念明确，避免了次内力的计算，简化了设计。
[关键词]  抗弯承载力  预应力混凝土  压弯模式  综合内力  次内力

The method to calculate the ultimate flexural capacity on normal section of prestressed concrete beams and slabs with flexural-compression mode is presented, which regards the resultant moment and axial force produced by effective prestress as the load effects, while the part of prestress increment as the resistance. This method, which uses the resultant forces to design directly but not the secondary forces, simplifies the design process of prestressed concrete structures.
Keywords:  ultimate bending capacity; prestressed concrete; flexural-compression member; resultant internal force; secondary internal force