索塔开口式下牛腿设计与优化分析  

Design and Optimization Analysis of Pylon Open Lower Corbel

作　　者：李冬 LI Dong(China Railway Construction Bridge Engineering Bureau Group First Engineering Co.Ltd.,Dalian Liaoning 116083,China)

机构地区：[1]中铁建大桥工程局集团第一工程有限公司,辽宁大连116083

出　　处：《铁道建筑技术》2025年第1期90-93,139,共5页Railway Construction Technology

基　　金：中国铁建股份有限公司科技研发计划项目(2021-C12)。

摘　　要：针对较短下塔柱引起温度次内力大的问题,提出了开口式下牛腿索塔方案,并对牛腿进行了拓扑优化。首先,建立了开口式下牛腿索塔方案和传统下横梁索塔方案的全桥有限元杆系模型。通过有限元分析,得到桥塔的弯矩和位移。然后,从内力分布和刚度的角度对比分析了开口式下牛腿索塔方案和传统下横梁索塔方案的优缺点。此外,对原牛腿设计方案进行了拓扑优化。结果表明:开口式下牛腿索塔方案能有效解决较短下塔柱引起温度次内力大的问题,本文研究结论可为同类工程设计和施工提供参考。In response to the issue of significant temperature-induced internal forces in relatively short pier columns,a scheme for an open-legged tower with lower corbels is proposed,and the topology of the corbels is optimized.Firstly,a finite element rod system model for the entire bridge is established for both the open-legged tower with lower corbels scheme and the traditional crossbeam tower scheme.Through finite element analysis,the bending moments and displacements of the bridge towers are obtained.Then,the advantages and disadvantages of the open-legged tower with lower corbels scheme and the traditional crossbeam tower scheme are compared and analyzed from the perspectives of internal force distribution and stiffness.In addition,the original corbels design scheme is topologically optimized.The results indicate that the open-legged tower with lower corbels scheme can effectively solve the problem of significant temperature-induced internal forces in relatively short pier columns.The conclusions of this study can provide references for the design and construction of similar engineering projects.

关 键 词：索塔 下牛腿 内力 刚度 优化 

分 类 号：U448.27[建筑科学—桥梁与隧道工程] U443.38[交通运输工程—道路与铁道工程]