某54 m简支变截面钢槽型梁结构稳定设计-《高速铁路技术》

文章信息/Info

Title:: Structural Stability Design of the 54 m Simply Supported Variable Cross-section Steel Trough Girder

Keywords:: variable cross-section steel box girder|trough girder|thin walled high web|stiffening rib|stability

摘要:: 钢结构的稳定性是控制钢桥设计的关键，而局部稳定是整体稳定的前提和基础，国内现阶段桥梁设计规范对局部稳定问题的相关条文规定较少，在设计时通常参考国外的钢结构规范。文章以国内某铁路54 m变截面钢槽型梁为例介绍了稳定性设计的方法，结合国内铁路钢桥规范推荐的能量法，对薄壁高腹板结构的构件局部稳定的设计方法进行探讨，并与国外钢结构规范的方法进行了对比验证分析，计算结果可为类似结构的设计和施工提供参考。

Abstract:: The stability of steel structures is the key to control the design of steel bridges, and the local stability is the premise and foundation of the overall? stability. The relevant provisions of the bridge design specification on local stability are less at the present stage in China. Foreign steel structure specifications are usually referred to in the design. The stability design methods are introduced by taking the 54m variable cross-section railway steel trough beam in China as an example in this paper. Combined with the energy method recommended by the standard for railway steel bridge in China, the design methods of the local stability on the thin-walled high web structure are discussed, and the comparison validation and analysis are carried out with the foreign steel structure codes. The calculation results can provide reference for the design and construction of similar structure.