太阳辐射模型对钢管混凝土墩柱温度场的影响研究  

RESEARCH ON THE EFFECT OF SOLAR RADIATION MODEL ON TEMPERATURE FIELD OF CONCRETE-FILLED STEEL TUBE PIER

作　　者：任志刚[1] 胡曙光[2] 丁庆军[2] 

机构地区：[1]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070 [2]武汉理工大学硅酸盐材料工程教育部重点实验室,湖北武汉430070

出　　处：《工程力学》2010年第4期246-250,256,共6页Engineering Mechanics

基　　金：国家自然科学基金项目(50508034)

摘　　要：太阳辐射模型对外界环境作用下的桥梁结构温度场数值模拟分析至关重要。通过选取ASHRAE模型、Hottel模型、Dilger模型3种瞬态太阳辐射计算模型,结合热传导理论和有限元分析方法,建立了太阳辐射作用下的桥梁结构热分析有限元基本方程。并以钢管混凝土墩柱为例,分别就3种模型作用下的"大暑"日与"大寒"日截面温度场进行了分析。结果显示:晴朗天气条件下的截面最高温度、最大非线性温差可分别达到52℃、20℃以上;同时,对3种模型作用下截面温度效应的对比分析表明,Hottel模型具有较好的易用性和普适性,而在有充分的太阳辐射观测数据便于模型待定参数回归分析的地区,ASHRAE模型则较为实用。The calculation model of solar radiation has an effect on the temperature field simulation of a bridge structure under ambient environment. By means of the heat transfer theory and finite element method, the three transition solar radiation model of ASHRAE model, Hottel model and Dilger model are adopted to derive the finite element formulation of a bridge structure under solar radiation. As an example of the concrete-filled steel tube piers, temperature field analysis is conducted by use of the three models on the Greater Heat Day and Greater Cold Day. The results show that the highest temperature and the largest nonlinear temperature difference reach more than 52℃ and 20℃ under the clean-day climate respectively, and the difference results of the cross-section temperature filed due to three models show that Hottel model is good-to-use and universal, while ASHRAE model is more practical for the region of sufficient observation data of solar radiation for regression of the model unknowns parameters.

关 键 词：太阳辐射模型 温度场 热传导 有限元法 钢管混凝土墩柱 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]