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本文介绍了桥梁结构的力学计算方法，对桥梁结构ＣＡＤ系统的研制和设计方法进行了初步探讨，并列举应用实例说明了平面连续梁模型和空间有限元模型计算结果的区别，表明对桥梁结构进行全面的力学性能计算分析是十分必要的．
This paper introduces the mechanics calculation method of bridge structure, preliminarily discusses the research and design method of bridge structure CAD system, and illustrates the difference between the calculation results of the plane continuous beam model and the space finite element model by enumerating the application examples. It shows that the bridge structure Comprehensive calculation of mechanical properties is very necessary.