摘要:公路桥梁结构设计系统(简称：GQJS)是交通运输部公路科学研究自主研发的桥梁有限元分析软件，在建立空间有限元计算模型时采用桥梁基本设计参数建立了各施工及成桥阶段的实体、板壳、空间梁格三维有限元计算模型，能够进行空间结构的静力和模态计算分析。该系统可建立包括斜拉桥、悬索桥、刚构桥、组合式梁桥及曲线桥等复杂桥梁的三维有限元模型，根据结构形式采用适合的单元进行模拟，例如：混凝土桥梁采用12节点实体单元，钢箱梁桥梁采用板壳单元，钢筋、拉索及支撑采用杆单元等。该系统基于OpenGL图形函数库开发了三维模型显示平台，可任意浏览和查阅桥梁三维有限模型和结构计算结果云图，大大提高了桥梁设计工作效率。

Abstract: The Highway Bridge Structure Designing System (GQJS) is a finite element analysis software for bridge independently developed by the Research Institute of Highway Ministry of Transport, which is able to parametrically establish a 3D finite element model using basic solid, shell and beam elements for the static and modal calculation and analysis of space structures. By using the system, complicated bridge structures can easily model for 3D finite element analysis, including the cable stayed bridge, the suspension bridge, the rigid frame bridge, the composite girder bridge and the curved bridge. Suitable elements are applied to simulate according to the structure of bridge, e.g. the concrete bridge adopts 12 node solid element, the steel box girder bridge adopts the plate and shell element, and the steel bar, the cable and the supportadopt the rod unit. On the system, a 3D model display platform is developed using the OpenGL graphic function library, which enables the browse and access of the 3D finite element bridge.