陕北榆林地区混凝土箱梁温度梯度分析  

Concrete Box Girder Temperature Gradient Analysis of Yulin District

作　　者：高大峰[1] 何新成[1] 任禹州[1] 

机构地区：[1]西安建筑科技大学结构工程与抗震教育部重点实验室,西安710055

出　　处：《太原理工大学学报》2012年第2期212-215,共4页Journal of Taiyuan University of Technology

基　　金：陕西省重点学科建设专项资金资助项目(E01004);陕西省教育厅专项科研项目(2010JK635)

摘　　要：针对混凝土箱梁的温度作用效应直接影响施工过程的安全性及后期使用阶段的可靠性,结合陕西省府谷县华建大桥施工控制,对其箱梁连续3d的温度场及温度效应进行观测,以及对该桥进行温度参数识别,基于传热学经典理论,建立数值模型,采用瞬态热分析方法,得出相应的理论温度场。通过与实测温度梯度值的分析比较,采用回归分析方法,推导出适用于陕北地区冬季混凝土箱梁温度梯度计算模式。Aimed at the influence of temperature action effect in concrete box girder on the safety during bridge construction and the reliability during bridge service, this paper measured a 3- day-long temperature field and effect and identified the temperature parameters in Huajian Bridge of Fugu County,Shaanxi Province. Based on classical heat transfer theory,a numerical model was established in which transient thermal analysis was adopted to obtain theoretical temperature field. From the comparison with measured temperature gradient values, a calculation model for temperature gradient in concrete box girder was derived by regression analysis, which is applicable in the winter of Northern Shaanxi Province.

关 键 词：混凝土箱梁 温度梯度 太阳辐射 日照温差 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]