基于梁格法宽幅双层钢桁梁有限元分析  

Finite Element Analysis of Wide Double-layer Steel Truss Girder Based on Grillage Method

作　　者：董创文 胡徉 李传习 DONG Chuangwen;HU Yang;LI Chuanxi

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]广西大学土木建筑工程学院,广西南宁530004 [3]省部共建特色金属材料与组合结构全寿命安全国家重点实验室,广西南宁530004

出　　处：《重庆建筑》2025年第1期49-51,64,共4页Chongqing Architecture

摘　　要：探讨梁格法在宽幅双层钢桁梁桥中的应用前景。首先,以宽幅双层钢桁梁桥作为工程实例,运用有限元软件ANSYS建立尽可能考虑实际构造的板壳单元模型;其次,依据梁格法的理论,找到适合该实例的梁格划分方法,进而建立梁单元模型;最后,对比两者的位移、反力和应力结果。结果显示:梁单元模型的位移、反力和应力与板壳单元模型的变化规律相同,挠度最大相差仅为5.16%,反力平均相差仅11 kN,应力平均差值为2.52 MPa。在对此类宽幅钢桁梁进行空间分析时,梁格法具有有效性。The application prospect of the beam lattice method in wide double-layer steel truss girder bridges was discussed.Firstly,a wide double-deck steel truss girder bridge was taken as an engineering example,and the finite element software ANSYS was used to establish a plate and shell element model that considered the actual structure as much as possible.Secondly,using the theory of beam lattice method,a suitable beam lattice division method is found for this example,and the beam element model is established.Finally,the displacement,reaction force and stress results of the two are compared.The results show that the displacement,reaction force and stress of the beam element model are the same as those of the plate-shell element model,with the maximum difference in deflection being only 5.16%,the average difference in reaction force being only 11 kN,and the average stress difference being 2.52 MPa.In the spatial analysis of such wide steel trusses,the beam lattice method is effective.

关 键 词：梁格法 板壳单元模型 正交异性刚桥面板 宽幅双层钢桁梁 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]