大学生结构设计竞赛大跨桥梁结构模型设计

The Structural Model Design of Long-Span Bridges in College Students’Structural Design Contest

文章以第十四届全国大学生结构设计竞赛东莞理工学院二等奖作品为例,结合竞赛赛题“变参数桥梁结构模型设计与制作”要求,参考工程中常见的桥梁结构形式,完成了大跨度桥梁结构模型的初步设计。接着运用Midas/Civil进行建模计算,对模型结构的杆件受力和变形情况进行计算分析,验算模型结构的承载力,基于计算结果对模型结构进行优化设计,在确保结构的强度、刚度和稳定性满足要求的同时,提高模型的荷重比。最后,通过加载试验对仿真分析结果进行验证,为实际工程大跨度桥梁的设计优化提供参考。

Taking the second prize works of the 14th National College Students’Structural Design Contest of Dongguan University of Technology as an example,combined with the requirements of the contest“the design and production of variable parameter bridge structure model”,referring to the common bridge structure forms in engineering,the preliminary design of the long-span bridge structure model is completed.Then with Midas/Civil modeling calculation,the rod force and deformation of model structure is calculated and analyzed,and the bearing capacity of the model structure is checked and calculated.Based on the calculation results,the design of the model structure is optimized to ensure that while meeting the requirements of the strength,stiffness and stability of the structure,the load ratio of the model is also improved.Finally,the simulation results are verified by loading test,which provides a reference for the design optimization of long-span bridges in practical engineering.