中文摘要：

研究了1个三铰拱结构的受力特点，利用Maple编写了求解三铰拱结构反力及内力的计算机程序，并同时画出了结构的内力图。实例表明：用Maple编程求解三铰拱结构的力学问题，精确性高，可操作性强，快速、便捷，大大提高了计算效率及绘图效果。所编的程序可进一步推广到其它同类问题，扩大其应用范围。

英文摘要：

In this paper, the mechanical characteristics of a three-hinged arch are studied. By means of Maple, a computer program is programmed for solving the reacting forces and internal forces of the three-hinged arch. Mean while, the diagrams of the internal forces of the arch structure are drawn. The example shows that the programming by Maple is efficient and reliable. The computing efficiency and drawing effect are much more improved. The method is fast and simple for the mechanical analysis of three-hinged arch structures. The program can still be expanded and its application fields can be enlarged for other similar problems.