基于气象参数的钢箱梁竖向温度梯度模式  

Vertical temperature gradient model of steel box girder based on meteorological parameters

作　　者：张玉平 李思阳 李传习 杨胜江 ZHANG Yuping;LI Siyang;LI Chuanxi;YANG Shengjiang(School of Civil Engineering,Changsha University of Science&Technology,Changsha,Hunan 410114,China;Guizhou Communications Construction Group Co.,Ltd.,Guiyang,Guizhou 550081,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]贵州交通建设集团有限公司,贵州贵阳550081

出　　处：《公路交通科技》2025年第1期147-155,共9页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(52078059)。

摘　　要：【目标】基于气象参数,利用统计分析和数值模拟相结合的方法,确定钢箱梁在日照环境下的温度梯度模式,以解决传统实桥温度试验方法工作量大、成本高的问题。【方法】以浙江省杭州江东大桥为例,根据热传导原理,借助有限元软件,建立了包含铺装层的钢箱梁二维数值模型,并将模型计算结果与实桥获取的少量温度测量数据进行对比,以验证模型的准确性和可靠性。【数据】基于杭州地区2014年至2016年夏季晴天及多云天的气象数据,借助有限元软件计算得到江东大桥带铺装层钢箱梁的日最大竖向正温差样本数据,并对样本数据进行统计分析,最终得到钢箱梁具有50 a重现期的竖向正温差标准值。【结果】温度计算值与实测值吻合较好,两者最大差值不超过1.5℃;江东大桥钢箱梁夏季晴天及多云天的日最大竖向正温差服从广义极值分布;江东大桥带铺装层钢箱梁竖向正温差标准值为16.82℃,该值小于按照相关桥梁设计规范计算得到的取值。【应用】不同地区气象条件差异使得规范统一的温度梯度模式无法完全涵盖中国所有区域,本研究方法为根据当地气象条件,得到适用于该地区钢箱梁的温度梯度模式提供了参考。[Objective]This study aims to determine the temperature gradient mode of steel box girders under sunlight conditions by using meteorological parameters,statistical analysis,and numerical simulation methods.The goal is to address the high workload and high cost associated with the traditional in-situ temperature testing methods for bridges.[Method]Taking Hangzhou Jiangdong Bridge in Zhejiang province for an example,a two-dimensional numerical model of steel box girder,including paving layer,was established by using finite element software.The model was developed based on the principle of heat conduction.The model results were compared with the limited actual bridge temperature measurement data to verify the model accuracy and reliability.[Data]Based on the meteorological data from sunny and cloudy days in Hangzhou during summers from 2014 to 2016,the sample data were calculated with the finite element software.These data correspond to the daily maximum vertical positive temperature difference of Jiangdong Bridge’s steel box girder with paving layer.The statistical analysis was conducted on the data.Finally,the standard value of vertical positive temperature difference with 50-year return period was determined.[Result]The temperature calculation values closely match the measured values,with the maximum difference not exceeding 1.5℃.The daily maximum vertical positive temperature difference of Jiangdong Bridge’s steel box girder during sunny and cloudy days in summer follows the generalized extreme value distribution.The vertical positive temperature difference standard value of Jiangdong Bridge’s steel box girder with paving layer is 16.82℃.This value is less than that calculated with the relevant bridge design specifications.[Application]The meteorological condition differences across different regions of China make it impossible for an unified temperature gradient model in the standards to fully cover all regions.This study provides a reference for determining the temperature gradient mode applicable to

关 键 词：桥梁工程 竖向温度梯度模式 数值分析 钢箱梁 概率模型 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]