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前言近廿年来,部分预应力混凝土结构逐渐得到国内外工程界的充分重视,其主要优点可以概括为三个方面:①可以节约钢材,特别是高强预应力筋;②有助于避免锚下裂缝或沿力筋
Preface Nearly 20 years, some prestressed concrete structures have gradually gained the full attention of domestic and foreign engineering circles. The main advantages of the prestressed concrete structures can be summed up in three aspects: (1) steel can be saved, especially high-strength prestressed tendons; (2) Or along the tendons