无粘结预应力粗钢筋在斜拉梁桥中的应用  

Application of Unbound Prestressed Crude Steel in Cable-stayed Bridges

作　　者：郑丹[1] 郭启华[2] 

机构地区：[1]湖南交通职业技术学院公路学院,湖南长沙410004 [2]广西柳工机械股份有限公司中央研究院压路机研究所,广西柳州545007

出　　处：《筑路机械与施工机械化》2011年第1期70-72,共3页Road Machinery & Construction Mechanization

摘　　要：结合某特大桥预应力体系与设置,以及竖向预应力粗钢筋组成的实例,对其应用技术、施工工艺、施工处理措施及质量控制进行介绍,并对该类桥梁结构中竖向采用无粘结预应力高强粗钢筋的受力性能、抗裂性能、安全可靠性与有粘结预应力进行比较。指出采用无粘结预应力同样能满足设计要求,且施工简便,进度快。According to the prestressed system and settings, and the example of vertical prestressed crude steel of certain cable-stayed bridge, the applied technology, construction process, treatment measures and quality control are introduced. At the same time, the mechanical behavior, crack resistance, safety and reliability of bridge structure using unbound prestressed crude steel are compared with using bound prestressed force. It is pointed out that unbound prestressed force also can meet the design requirements; make construction simple; accelerate construction speed, and save project cost.

关 键 词：斜拉桥 连续梁 无粘结预应力 粗钢筋 

分 类 号：TU757.2[建筑科学—建筑技术科学]