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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2025, Vol. 44 ›› Issue (1): 33-42.DOI: 10.3969/j.issn.1674-0696.2025.01.05

• 交通基础设施工程 • 上一篇    

考虑风-温耦合的钢箱梁外形对温度效应影响研究

黄旭1，何佳骏1，丁文龙1，朱金2，李永乐2   

  1. (1. 中国市政工程西南设计研究总院有限公司，四川 成都 610213；2. 西南交通大学 土木工程学院，四川 成都 610031)
  • 收稿日期:2024-05-14 修回日期:2024-10-10 发布日期:2025-01-20
  • 作者简介:黄旭（1995—），男，四川成都人，工程师，博士，主要从事桥梁温度效应方面的研究。E-mail：huangxu_0614@163.com 通信作者：朱金（1988—），男，江苏常州人，副教授，博士，主要从事风-汽车-桥耦合振动、桥梁温度效应方面的研究。E-mail：zhujin19880102@126.com
  • 基金资助:
    国家自然科学基金项目 (U21A20154)

Influence of Configuration of Steel Box Girder on Temperature Effect Considering Wind-Temperature Coupling

HUANG Xu1, HE Jiajun1, DING Wenlong1, ZHU Jin2, LI Yongle2   

  1. (1. Southwest Municipal Engineering Design & Research Institute of China, Chengdu 610213, Sichuan, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
  • Received:2024-05-14 Revised:2024-10-10 Published:2025-01-20

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摘要： 为了准确分析钢箱梁外形对截面温度特性的影响规律，提出了一种考虑钢箱梁周围局部风场与温度场相互作用的有限元分析方法，采用折减系数k来建立钢箱梁周围热边界层高度处风速Ua与远处气象站实测风速U的对应关系，对比分析了是否考虑风-温耦合对钢箱梁截面温度分布的影响，探讨了不同风嘴形式、截面宽高比、不同栏杆形式以及铺装厚度对钢箱梁截面温度分布的影响规律。研究表明：钢箱梁周围热边界层厚度处的风速Ua呈不均匀分布，且与远处风速U呈线性正相关；不考虑风-温耦合会明显低估钢箱梁顶板表面温度；钢箱梁截面的风嘴、截面宽高比、栏杆参数以及铺装厚度均会影响钢箱梁横截面的温度分布，改变截面的温差，因此，在桥梁的设计中，钢箱梁外形对截面温度分布的影响不可忽视。

关键词: 桥梁工程；钢箱梁；风-温耦合；数值模拟；热边界层

Abstract: In order to accurately analyze the influence rule of the configuration of steel box girders on the temperature characteristics of the cross-sections, a finite element analysis method that considered the interaction between the local wind field and temperature field surrounding the steel box girder was proposed. The reduction coefficient k was used to establish the corresponding relationship between the wind speed Ua at the height of the thermal boundary layer around the steel box girder and the wind speed U measured at a distant meteorological station. Comparative analysis was conducted on whether the influence of wind-temperature coupling on the temperature distribution of steel box girder cross-sections was considered. The influence rule of different nozzle forms, cross-sectional aspect ratios, railing forms and pavement thickness on the temperature distribution of the steel box girder was discussed. The research results indicate that the wind speed Ua at the thermal boundary layer thickness around the steel box girder displays an uneven distribution and is linearly and positively correlated with the distant wind speed U. Not considering the wind-temperature coupling will significantly underestimate the surface temperature of the top plate of the steel box girder. The air nozzle, aspect ratio, railing parameters, and pavement thickness of the steel box girder section will all affect the temperature distribution of the cross-section, changing the temperature difference of the section. Thus, in the design of bridges, the influence of configuration of steel box girder on temperature distribution of cross-sections should not be ignored.

Key words: bridge engineering; steel box girder; wind-temperature coupling; numerical simulation; thermal boundary layer

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