城市高架桥梁横向预应力钢束布置研究

摘要

Combining with the engineering examples, the paper researches from the lateral prestressed arrangement methods for the viaducts, an-alyzes the reasonability from the upper tendon arrangement, arrangement at the center of the section, and lower arrangement, points out the a-doption of the bending prestressed tendon to lower the tendon sagging moment to meet the crack resistance of the type A prestressed concrete components and lower engineering cost.%结合工程实例，对高架桥横向预应力布置的方法开展了研究，分析了钢束布置偏上、布置在截面中心以及布置偏下三种方式的合理性，提出在支点处采用下弯预应力钢束形式，达到降低钢束正弯矩的目的，进而满足A类预应力混凝土构件的抗裂性要求，降低工程成本。