样条有限条板梁结合单元

A New Type of Plate-Beam Spline Strip Elements

本文采用最小势能原理,推导纵向用B_3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。

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.