组合梁桥截面温度分布影响因素对比分析  

Comparative Study of Influential Factors for Temperature Distribution in a Composite Bridge Cross-section

作　　者：张凯龙[1] 马如进[1] 陈艾荣[1] 

机构地区：[1]同济大学桥梁工程系,上海200092

出　　处：《结构工程师》2014年第5期42-48,共7页Structural Engineers

摘　　要：针对某变形精确控制组合梁桥的温度变形问题,综合桥梁所处地理环境特征、桥梁结构几何构型等因素,实现对相关随机气象参数(尤其太阳辐射强度)的取值修正;进而通过对结构热环境的有限元模拟,得到截面温度分布的数值结果。以此为基础,着重探讨了三种结构材料(沥青混凝土、混凝土和钢)的相关热力学参数以及沥青混凝土铺装层厚度对截面温度分布的影响方式及程度,并就对应的荷载效应进行了定性的评估与对比。以此为指导,结合目前新型材料的优良热力学性能,工程人员可采取针对性设计或补偿措施达到降低梁体温度变形响应及优化线形的目的。This article studied thermal deformation of composite bridges .Firstly, based on geographical loca-tion and geometric characteristics of a bridge , the method to adopt solar radiation data was corrected .Numeri-cal results of temperature distribution in the cross-section were acquired by finite element modeling .Secondly , by numerical calculations , different influential factors such as pavement thickness , various thermodynamic pa-rameters of the three components of the structure , which include asphalt deck pavement , concrete deck and steel beam , were studied .It is concluded that proper thermodynamic properties of modern materials can be used to compensate of thermal deformation of a bridge .

关 键 词：组合梁桥 温度分布 对流换热 时程模型 参数分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]