摘要
重庆朝天门长江大桥为世界第1跨度公轨2用拱桥,设计中主要以应力控制为主。阐述柔索索力传统计算方法,指出在计算扣索力时用传统先估算索力的计算方法误差很大。在实际有限元设计中,采用刚度分配法计算扣索力,不仅计算方便、快捷、准确,而且兼顾了目标控制应力和控制位移。
Chongqing Chaotianmen Yangtze River Bridge is an arch bridge of the longest span in the world for expressway traffic and light-railway traffic. Stress control is the first thing in the design. This paper describes traditional calculation method of soft cable force, points out that there is a major error in the traditional calculation method for force of knotted cable where force of cable is estimated beforehand. Rigidity distribution method is used to calculate force of cable in finite element design. It is not only convenient, quick, and accurate for the calculation, but can take care of target control stress and control displacement.
出处
《公路交通技术》
2009年第2期75-79,共5页
Technology of Highway and Transport
关键词
刚度分配法
切线刚度矩阵
合理扣索力
rigidity distribution method
tangent stiffness matrix
reasonable force of knotted cable
