论文部分内容阅读
斜拉-连续协作体系桥梁具有斜拉桥与连续梁桥二者的特点,近年来该体系在中国得以推广。斜拉索是斜拉-连续协作体系的关键组成部分,不同的拉索布置形式将对结构体系的整体受力造成影响。该文以剑邑大桥为例,采用Midas Civil软件建模,对比分析了扇形、竖琴形两种拉索布置形式对斜拉-连续协作体系内力、变形及稳定性的影响。经对比研究后发现,两种不同的拉索布置形式对主梁受力及变形影响均较小;采用扇形布置的主梁面内稳定性略高于竖琴形布置;采用竖琴形布置的主塔稳定系数大于扇形布置,约为后者的1.5倍。
Cable-stayed-continuous system bridges have the characteristics of both cable-stayed bridges and continuous beam bridges. In recent years, the system has been extended in China. Stay cables are a key component of a cable-stayed-continuous system. Different cable layouts will affect the overall force of the system. Taking Jiangyi Bridge as an example, this paper uses Midas Civil software to model and analyze the influence of the two types of cable and harp arrangement on the internal forces, deformation and stability of the cable - stayed cooperative system. After comparative study, it is found that two different types of cable arrangement have less influence on the stress and deformation of the main girder. The in-plane stability of the girder with the fan-shaped arrangement is slightly higher than that of the harp arrangement. The stability factor of the main tower with the harp arrangement Greater than the fan-shaped layout, about 1.5 times the latter.