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介绍了新版《混凝土结构设计规范》中预应力混凝土结构构件设计计算、构造方面修订和新增的内容。要点为预应力作用参与相关荷载组合,预应力新材料,裂缝控制及裂缝宽度验算,考虑内力重分布进行调幅的计算,施工阶段验算要求,改进预应力混凝土收缩、徐变损失值计算,预应力混凝土局部承压间接加强钢筋的配置和防止预制预应力混凝土构件端部裂缝的配筋要求,预应力混凝土结构在地震区的应用及抗震设计,以及新增加无粘结预应力混凝土设计规定等。
The design and calculation of the prestressed concrete structural members in the new edition of Code for Design of Concrete Structures are introduced. The revised and newly added contents are also introduced. Key points Participate in relevant load combinations, prestressed new materials, crack control and crack width checking for prestressing effect, calculate amplitude modulation with consideration of internal force redistribution, check requirements during construction phase, improve prestressed concrete shrinkage, creep loss calculation, The local pressure of concrete indirectly strengthens the configuration of steel bars and the requirements of reinforcement to prevent the end cracks of precast prestressed concrete members, the application of prestressed concrete structures in earthquake areas and seismic design, and the newly added non-bonded prestressed concrete design requirements.