摘要
基于非线性弹性理论，假定索是理想柔性的且满足虎克定律，根据单索的平衡方程及变形协调条件，推导了两跨连续索在中间节点滑移的一种理论解法，建立了其非线性计算的基本理论和公式，并根据ＮｅｔｏｎＲａｐｈｓｏｎ 叠代方法建立了非线性求解方法和步骤，进行了实例计算．结果表明：本文方法可靠合理，概念清楚，计算简单，精度与非线性数值解非常接近，足以满足工程要求．
According to the nonlinear elastical theory,it is assumed that the cable possesses ideal flexibility and meets HuKe′s principle.With the help of the equilibrium and deformation condition of single cable an analytical method for two span continuous cable structures with sliding cable elements in the middle node is presented.By means of the Newton Raphson method,a nonlinear computation method is obtained,and an example is given.Numerical results show that the present model is of high precision,and can be adopted in engineering practice.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1999年第3期87-91,共5页
Journal of Hohai University(Natural Sciences)
关键词
连续索
滑移单元
悬索结构
预应力
节点滑移
continuous cable
sliding element
nonlinearity
analytical method
