寒冷地区混凝土箱梁温度场研究  

Study of temperature field of concrete box girder in cold area

作　　者：孙维刚[1] 陈永瑞[1] 刘来君[1] 武群虎 于杨龙 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]中铁二十局集团第六工程有限公司,陕西西安710032

出　　处：《合肥工业大学学报（自然科学版）》2015年第7期962-967,共6页Journal of Hefei University of Technology：Natural Science

基　　金：国家西部交通建设科技资助项目(2009319812050);甘肃省交通运输厅科研资助项目(2009-05);陕西省交通运输厅科研资助项目(13-25K)

摘　　要：文章以甘肃省永古高速公路柳条河大桥为例,进行了现场温度观测;利用最小二乘法回归分析理论,拟合箱梁截面温度时程曲线,得出了基于傅里叶函数的温度时程拟合模型;选择典型时刻的实测温度,进行竖向温度分布分析,提出了竖向温度梯度拟合公式。研究结果对寒冷地区混凝土箱梁温度预测及温度应力计算具有一定的参考价值。The Liutiao River Bridge of Yongdeng-Gulang Highway in Gansu Province was taken as an example, and the temperature field of the bridge was observed. The least squares regression analysis theory was adopted to fit temp-time curves of the box girder bridge, and the temp-time fitting model based on Fourier function was obtained. The observed temperatures at typical moments were selected, the vertical temperature distribution was analyzed, formulas were made. The results of the study have certain reference value in the temperature predic-tion and stress calculation of concrete box girder in the cold areas.

关 键 词：寒冷地区 箱梁 温度场 拟合 温度梯度 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]