波形钢腹板组合箱梁日照非均匀温度场研究  

Investigation of Non-uniform Temperature Field of Composite Box-girders with Corrugated Steel Webs Under Solar Radiation

作　　者：黄石基 蔡陈之 邹云峰[1,2] 何旭辉[1,2] 张炎培 HUANG Shi-ji;CAI Chen-zhi;ZOU Yun-feng;HE Xu-hui;ZHANG Yan-pei(School of Civil Engineering,Central South University,Changsha 410075,Hunan,China;National Engineering Research Center of High-speed Railway Construction Technology,Central South University,Changsha 410075,Hunan,China;Zhengzhou Erqi District State-owned Assets Management Co.Ltd.,Zhengzhou 450052,Henan,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程研究中心,湖南长沙410075 [3]郑州二七国有资产经营有限公司,河南郑州450052

出　　处：《中国公路学报》2024年第4期239-251,共13页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(U1934209);湖南省自然科学基金项目(2022JJ0082);中国中铁股份有限公司科技研究开发计划项目(2021-专项-04-2)。

摘　　要：桥梁结构长期暴露在复杂的自然环境中,在太阳辐射、大气温度波动等多种因素的综合作用下,结构内部会产生显著的非均匀温度分布。以波形钢腹板组合箱梁为研究对象,对其日照温度场分布特点开展试验研究,揭示了波形钢腹板组合箱梁日照非均匀温度场的分布规律及时变特性。试验中测点的温度变化均以日为周期进行波动,其变化周期与变化趋势与大气温度基本一致。波形钢腹板组合箱梁表现出了明显的非均匀温度分布,箱梁北侧和南侧腹板的竖向温度梯度分别可达12.8℃和12.1℃。建立了波形钢腹板组合箱梁日照温度场三维数值仿真模型,并利用温度试验数据对该模型的准确性进行了验证。所有测点数值模拟结果与实测结果的平均误差均处于0.6℃到1.5℃,且最大误差不超过3.6℃。基于环境要素模型对波形钢腹板组合箱梁日照温度场的长期变化进行了模拟,得出组合箱梁南侧和北侧腹板的极端竖向温差分别为35.6℃和27.8℃,该温差值超出了现行组合桥梁规范给出的竖向梯度温度荷载。研究可为波形钢腹板组合箱梁的结构设计以及进一步工程应用提供一定的参考价值。Bridge structures are exposed to complex natural environments and directly subjected to fluctuations in the air temperature and solar radiation. The impact of the surrounding environmental factors results in a significantly non-uniform temperature distribution in the structures. In this study, an experimental investigation was conducted to obtain a comprehensive understanding of the nonuniform temperature field of a composite box girder with corrugated steel webs and to reveal its time-varying and spatial distribution characteristics. The same temperature variations were used at all measurement points, which is consistent with the air temperature conditions. According to the experimental results, a nonuniform temperature field occurs in the composite box girder with corrugated steel webs, and the daily maximum vertical temperature gradient along the north and south webs is 12.8 ℃ and 12.1 ℃, respectively. Subsequently, a finite element method simulation model of the experimental composite box girder was established and validated using the measured temperature data. The obtained average absolute errors of the measurement points generally range from 0.6 ℃ to 1.5 ℃, and the maximum absolute errors are less than 3.6 ℃. Based on a model of the environmental parameters and numerical simulation, the long-term temperature variation in the actual composite box girder with corrugated steel webs was continuously simulated. The long-term simulation indicates that the extreme vertical temperature gradients along the south and north webs are 35.6 ℃ and 27.8 ℃, respectively, which exceed the vertical temperature gradient given in the current composite bridge design code. Therefore, this study can be used as a reference for the structural design and further engineering applications of composite box girders with corrugated steel webs.

关 键 词：桥梁工程 非均匀温度场 试验研究 组合箱梁桥 波形钢腹板 数值模拟 

分 类 号：U44[建筑科学—桥梁与隧道工程]