中国工程科学Issue(3)：50-58,63,10.
超大跨度斜拉桥空气静力和动力稳定性研究
Research of the aerostatic and aerodynamic stability of super long-span cable-stayed bridges
摘要
Abstract
With the increase of span length,the cable-stayed bridge tends to be a more slen-der structural system,and consequently the wind stability becomes an important problem for its design and construction. Three-dimensional nonlinear aerostatic and aerodynamic stability anal-ysis of long-span bridges is used to investigate the aerostatic and aerodynamic stability of a su-per long-span cable-stayed bridge with main span of 1 400 m,and the results are compared with those of a suspension bridge with the similar main span,and considering from the aspect of wind stability,the availability of using the cable-stayed bridge in super long-span bridges whose main span exceeds 1 000 m is discussed. In addition,parametric analysis on the aerostat-ic and aerodynamic stability of super long-span cable-stayed bridges is conducted including the depth and width of the girder,structure style of the tower,the tower’s height-to-span ratio,the ratio of side span to main span,the auxiliary piers in the side span and the anchorage system of stay cables etc,and the key design parameters are pointed out,and also their reasonable values are proposed. The results show that as compared to the suspension bridge with the same main span,the cable-stayed bridge has greater structural stiffness,and becomes more stable under the static and dynamic wind action,and consequently becomes a favorable structural system for super long-span bridges whose main span exceeds 1 000 m;the super long-span cable-stayed bridge becomes more aerostatically and aerodynamically stable under the cases that the girder depth is increased,the girder width is decreased,the inverse Y-shaped tower is used,the tow-er’s height is increased,the side span is shortened,the auxiliary piers are installed in side span and the stayed cables are partially earth-anchored.关键词
超大跨度斜拉桥/空气静力稳定性/空气动力稳定性/设计参数Key words
super long-span cable-stayed bridge/aerostatic stability/aerodynamic stability/design parameter分类
交通工程引用本文复制引用
张新军,孙海凌..超大跨度斜拉桥空气静力和动力稳定性研究[J].中国工程科学,2014,(3):50-58,63,10.基金项目
浙江省自然科学基金项目 （）
