叠合装配式工字钢轨道梁高台支架稳定性设计验算

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中图分类号：TU391 文献标志码：A 文章编号：1003-5168（2025）19-0061-05

DOI：10.19968/j.cnki.hnkj.1003-5168.2025.19.012

Design and Stability Check of High-Platform Support for Composite PrefabricatedI-Steel-BeamTrackGirder

WANG Kun'YANG Xinxiang'LIN Anqing² CHEN Zhuoyi² GUO Xing² （1.Hunan Road & Bridge Construction Group Co.， Ltd.， Changsha 410o04， China; 2.School of Civil Engineering， Changsha University of Science and Technology， Changsha ， China）

Abstract： [Purposes] Aiming at the problems of low material utilization rate and high steel consumption in traditional track girders，a new composite prefabricated I-steel-beam track girder structure was developed to enhance its economy and stability.[Methods] Based on Midas finite element software，using a dual-control index combining bending compressive stress and average shear stress，and referring to relevant codes，the local stabilityof the web，the bearing capacity of the support stiffeners，and the end-face strength were systematicaly analyzed.[Findings] The safety factors for local web stability reached 1.82 （bending） and 2.44 （shear）; the actual stress in the support stiffeners was only 28.2% of the critical value; steel consumption was reduced by 23.4% ，and the component standardization rate increased to 92.5% [Conclusions] The proposed structure significantly improves material utilization effciency and provides a new track girder solution combining economy and reliability for bridge engineering. Future work could optimize its long-term performance under complex loading conditions.

Keywords： composite track girder; prefabricated I-steel-beam; support stability; finite element analysis; complex loading

0 引言

大跨度桥梁作为现代交通网络的重要组成部分，在促进区域经济协同发展和优化国土空间布局方面具有不可替代的作用。（剩余4617字）