基于卵形拱桥塔的空间索网景观斜拉桥设计

Design of Spatial-plane Landscape Cable-stayed Bridge Based on Egg-shaped Arch Pylon

针对斜拉桥景观性的设计要求,利用卵形曲线的数学方程,提出了一种卵形拱桥塔的空间索面景观斜拉桥.与传统的抛物线拱形桥塔斜拉桥相比,卵形拱桥塔拱脚两腿收拢,减少了基础尺寸,顶部宽阔,分散布置三维空间缆索,斜拉桥的景观效果更佳.结合实际工程,进行工程参数设计,建立Midas有限元分析模型,进行静力分析和模态分析研究.结果表明:卵形拱桥塔的空间索面斜拉桥具有良好的空间结构刚度.

Aiming at the landscape design requirement of cable-stayed bridge,an egg-shaped arched pylon spatial-plane landscape cable-stayed bridge is proposed by using the mathematical equation of egg-shaped curve.Compared with the traditional parabolic arched pylon cable-stayed bridge,two arch legs of the egg-shaped arch bridge are closed,which reduces the size of the foundation,the top is wide,and three-dimensional spatial cables are distributed so that the landscape effect of the cable-stayed bridge is better.Combined with the actual project,the engineering parameters are designed.Midas finite element analysis model is established to carry out the static analysis and modal study.The result shows that the egg-shaped arched pylon spatial plane cable-stayed bridge has the good spatial structural stiffness.