摘要
基于空间主缆自锚式悬索桥受力的内在要求,明晰了成桥状态确定的总体流程;从主梁受力合理(弯矩合理)的要求出发,获得了成桥状态吊索合理竖向力的确定方法;在阐述空间主缆找形解析法基本方程和吊索竖向力确定方法的基础上,给出了能确保收敛的空间主缆找形和吊索参数计算的具体步骤和方法;根据成桥状态吊索仅在横桥向倾斜的条件,推得了空间主缆线形变化刚度计算的递推公式。从而建立了概念明确、思路清晰、便于编程的空间主缆自锚式悬索桥成桥状态确定的高效高精度方法。杭州江东大桥的工程实例表明了该文方法的高效率、高精度。
With respect to self-anchored suspension bridge with spatial cable,the procedures to determine the finished bridge state is illustrated. In view of the internal force equilibrium （especially bending moments） of the girder,the vertical component of suspender＇s force was calculated. With the introduction of the fundamental analytical equations for spatial main cable shape and the method to calculate the vertical component of suspender＇s force,the rapid method to find the shape of spatial cable in finished state was proposed. Moreover,the recursive formulas to calculate the changing stiffness of spatial cable were derived,and the procedures to find the shape of spatial main cable and calculate the parameters of suspender were given. The example of Jiangdong Bridge in Hangzhou proved that the proposed method is efficient and precise.
出处
《工程力学》
EI
CSCD
北大核心
2010年第5期137-146,共10页
Engineering Mechanics
基金
国家自然科学基金项目(50778024)
交通部应用基础项目(2008-329-825-040)
湖南省桥梁与隧道工程重点学科和研究生创新基地项目(湘教通2006180)
关键词
桥梁工程
空间主缆自锚式悬索桥
成桥状态
计算流程
解析法
线形变化刚度
bridge engineering
self-anchored suspension bridge with spatial cable
reasonable design state
calculation process
analytic method
stiffness of cable while it＇s shape changing
