无粘结力后张预应力钢筋在桥梁建设中的应用

APPLICATION OF UNBONDED, PRESTRESSED TENDONS IN THE POST-TENSION BRIDGE CONSTRUCTION

为了解决天津永和斜拉桥主梁块件预制，首次提出在三向预应力块力中竖向预应力篇采用无粘结为预应为粗钢筋，主要解决块件断面较弱制孔困难，压浆串浆，简化施工工序。

he research results about the unbonded, prestressed tendons and its application for the Yonghe cable stayed bridge in Tianjin were presented. An esperimental study on friction, slide and fatigue was carried on in the laboratory. It was proved that the unbonded, prestressed tendon has a number of advantages and is reliable in the post-tension bridge construction.