Temperature Effect Analysis of Large Segment Factory Manufacturing Alignment of Steel Box Girder

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

International Journal of Steel Structures Pub Date : 2024-02-04 DOI:10.1007/s13296-024-00809-8

Fuqiang Deng, Jinfeng Wang, Songwei Yang, Linghua Xu, Rongqiao Xu

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Abstract

The construction of the cross-sea steel box girder bridge is gradually advancing and integrating, which particularly reflects in the size of the bridge. The length of a single installation segment often exceeds 100 m. The alignment of the steel box girder is significantly affected by the temperature effect during manufacturing. This paper investigates the impact of temperature gradient on corresponding alignment at the manufacturing stage for the large-segment steel box girder taking a large-span continuous steel box girder bridge as a case study. The inspection of temperature during the assembly procedure was carried out. After obtaining the data during welding, the influence of the temperature was evaluated using a finite element model. The results show that with the temperature gradient measured, the deflection of the second suspension of the mid-span reaches 10.9 mm and the deflection of the cantilever end reaches 17.1 mm, respectively. The deformation conforms to the code specifications when considering the influence of the temperature gradient effect. The corresponding pre-camber value should be set for the large segments assembled outdoor. At the same time, welding operation should be carried out under the preset temperature difference to partially eliminate the impact of temperature gradient.

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大型分段式工厂制造钢箱梁对齐的温度效应分析

摘要跨海钢箱梁桥的建设正在逐步推进和整合，尤其体现在桥梁的规模上。钢箱梁的对中受制造过程中温度效应的影响很大。本文以一座大跨度连续钢箱梁桥为例，研究了温度梯度对大跨度钢箱梁制造阶段相应对中的影响。对组装过程中的温度进行了检测。在获得焊接过程中的数据后，使用有限元模型评估了温度的影响。结果表明，在测得的温度梯度下，中跨第二悬索的挠度达到 10.9 毫米，悬臂端的挠度达到 17.1 毫米。考虑到温度梯度效应的影响，变形符合规范要求。室外组装的大型分段应设置相应的预拱度值。同时，焊接操作应在预设温差下进行，以部分消除温度梯度的影响。

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来源期刊

International Journal of Steel Structures 工程技术-工程：土木

CiteScore

2.70

自引率

13.30%

发文量

122

审稿时长

12 months

期刊介绍： The International Journal of Steel Structures provides an international forum for a broad classification of technical papers in steel structural research and its applications. The journal aims to reach not only researchers, but also practicing engineers. Coverage encompasses such topics as stability, fatigue, non-linear behavior, dynamics, reliability, fire, design codes, computer-aided analysis and design, optimization, expert systems, connections, fabrications, maintenance, bridges, off-shore structures, jetties, stadiums, transmission towers, marine vessels, storage tanks, pressure vessels, aerospace, and pipelines and more.