飞云江三桥曲塔柱桥塔设计

Design of Pylon with Curved Columns of Feiyunjiang Third Bridge

出于美观考虑,飞云江三桥采用上塔柱轴线为圆曲线的花瓶形桥塔。曲线形塔柱用于压弯为主的斜拉桥桥塔,在桥梁设计中尚属首次。飞云江三桥的实践表明,通过调整曲线半径、适当设置隔板及施加预应力进行主动调控,曲塔柱设计是可行的,且并未导致工程造价的提高。本文介绍了该桥塔的设计构思,通过结构分析加以验证,同时保证了结构的可行性。

For the aesthetic reasons, the bottle like pylon with the circular centre line of curved top columns of the Third Feiyunjiang Bridge is adopted. It＇s the first tirrie for curved column pylon used in cable-stayed bridge to withstand axial and moment forces. It can be seen from the practice of the usage of curved column pylon in the Third Feiyunjiang Bridge that the design is possible and no more extra investment is required by adjusting the curvature of the circular center line, selecting the reasonable number of diagram, and applying active control through introducing prestress in various construction stages. In this paper, the concept initiation of the pylon is introduced and the structural analysis is performed to guarantee the safety of this unique structure.