摘要
本文针对吊桥存在着巨大的恒载初内力的特点,从杆单元的无应变状态出发,推导出其单元的切线刚度矩阵,提出了一种考虑吊桥初内力的吊桥动力特性分析方法,指出了这种初内力对吊桥动力特性的影响范围,分析了吊桥动力特性的特点及产生的原因,得出了一些有意义的结论。
In this paper, an element tangent stiffness matrix is obtained from the strainless condition for the initial stress in suspension bridges subjected to dead load. A method for the analysis of dynamic properties of suspension bridges is given; and the area of the influence of the initial stress is pointed out. Finally, some important conclusions are obtained.
出处
《石家庄铁道学院学报》
1992年第2期46-54,共9页
Journal of Shijiazhuang Railway Institute
关键词
初内力
切线刚度矩阵
吊桥
initial stress
tangent stiffness matrix
geometric stiffness matrix
