独塔双索面自锚式无缝悬索桥的设计与分析

考虑柳青河桥的景观效果和满足河道通航要求,设计采用了独塔双索面自锚式无缝悬索桥,桥型优美轻便,主缆直接锚固在加劲梁梁端,节省了庞大的锚碇结构.由于主跨与边跨跨径比很大,在边跨适当配重的基础上,设计采用了半整体式桥台,利用桥台台身的重量来克服端支座拉力,既解决了拉力支座的问题,同时在该桥台处形成了无缝桥梁.重点介绍了柳青河自锚式无缝悬索桥的结构构造、设计要点及计算分析过程,以期供类似桥梁设计借鉴.

Design and Analysis of Self-anchored Seamless Suspension Bridge with Single Tower and Double Cable

Considering the scenic effect and meeting the needs of the waterway navigation of Liuqing River Bridge,the design used the self-anchored seamless suspension bridge with single tower and double cable that has beautiful and light bridge type,and saves a huge anchorage structure for its main cable is directly anchored at the end of the stiffening beam.As the span ratio of the main span and the side span are large,the semi-integral abutment is used to overcome the tension of the bearings with its dead weight on the basis that the side span has proper counter weight.It is meant that the problem of tension bearings is resolved,and a seamless bridge is formed at the abutment.In this paper,in order to offering reference to the design of the similar bridge,the structure construction,the design points and the calculation and ana-lysis process of Liuqing River Self-anchored Seamless Suspension Bridge are mainly introduced.