用于悬索桥分析的专用程序和通用程序均有其局限性。基于ANSYS平台进行二次开发，主要着眼于鞍座的模拟、顶推的实现、主缆和吊索的无应力长度确定、无应力长度保持不变的方法，并给出润扬大桥算例予以验证，使得用ANSYS分析悬索桥具有了专用程序的精度和通用程序前后处理方便的特性。

Special programs and general programs applied to suspension bridge analysis have their limitations. This paper focuses on ANSYS-secondary-development and makes it possible to analyze suspension bridges both with accuracy of special programs and convenience of general programs. This paper is dedicated to saddle simulation,incremental launching realization and how to obtain unstressed length of main cable and slings and how to keep it unchanged. In the end, the method is verified through finite element model in Runyang Yangtze River Bridge.

罗喜恒（1969—），男，福建上杭县人，高级工程师，工学博士，研究方向为桥梁结构设计理论