Abstract: In this paper, based on the bending theory of skew anisotropic plates and the displacement model which uses cubic polynomials in transcurrent direction and cubic B spline functions in longitudinal direction, the general total potential energy function for the bending of skew plates is[directly established in oblique coordinate system. Then, the stiffness equation of oblique plate strips is derived by using the variation principle.This method can be applied to calculate structurally orthotropic skew plate bridges and skew structurally anisotropic skew plate bridges.

Key words: internal force, analysis, finite strip, bridge

摘要： 本文以斜交构造异性斜板的弯曲理论为依据,用横向的三次多项式和纵向的三次β样条函数的乘积为位移函数,在斜交座标系下直接建立了斜板弯曲问题的总势能泛函,利用变分原理,推导出了斜交异性斜板条的刚度方程。本文适用于计算正交构造异性斜板桥和斜交构造异性斜板桥。

关键词: 内力, 分析, 有限条, 桥