钢-混凝土梁试件的温度分布与温度荷载分析  

Analysis of the temperature distribution and load of steel-concrete composite beam specimen

作　　者：陈焕新[1] 刘蔚巍[1] 刘凤珍[1] 

机构地区：[1]中南大学土木建筑学院

出　　处：《华中科技大学学报（自然科学版）》2003年第11期85-88,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：铁道部计划资助项目 (2 0 0 2G0 2 5 )

摘　　要：采用控制容积法来建立钢 混凝土混合梁试件 (以下简称“钢 混凝土试件”)温度分布的离散化方程 ,对钢 混凝土试件在夏季太阳辐射和外气温度变化时的内部温度变化过程进行了数值计算 ,得到了温度变化规律和分布情况 :随着气温和太阳辐射的不断变化 ,钢 混凝土试件内各点的温度变化趋势近似于余弦曲线 ,内部温度分布与其所处方位、表面朝向以及太阳辐射强度有很大的关系 .指出对青藏线上铁路桥梁结构的温度荷载将产生不利影响问题应予以高度重视 .A discrete equation of temperature distribution of the steel-concrete composite beam specimen was established by volume-control method, and the law of temperature changing and distribution was obtained by calculating the changing process of its internal temperature resulting from the change of the solar radiation and ambient temperature. The change trend of a point in the specimen was similar to a cosine curve, and the temperature distribution was closely related to its position, surface direction, and solar radiation intensity. It was also pointed out that temperature load will impact on the structure of railroad bridge in Qingzang Railway.

关 键 词：钢-混凝土混合梁试件 控制容积法 温度分布 温度荷载 非稳态导热 铁路桥梁 

分 类 号：U444[建筑科学—桥梁与隧道工程] U448.13[交通运输工程—道路与铁道工程]