Abstract: In this paper, applying the principle of stationary potential, the author developed a plate-beam spline element, worked out the stiffness matrix and load matrix, and programmed this method. It is found that this spline strip method is more efficent in the analysis of T-beams, spline girder and other bridges.

Key words: spline strip, folded plates and beams, box girder, spline girder

摘要： 本文采用最小势能原理,推导纵向用B₃样条函数表示的折板与梁条结合单元的刚度矩阵、荷载向量,并在计算机上实现了其分析过程。这种单元比简单的折板条单元更适合于T梁、脊骨梁、箱梁等桥梁结构的内力分析。

关键词: 样条有限条, 折板及梁条, 箱梁