主梁截面温度场数值模拟的太阳辐射计算方法  

Calculation Method of Solar Radiation for Numerical Simulationof Temperature Distribution on Girder Cross-section

作　　者：薛俊青[1] 李哲熙 BRISEGHELLA Bruno 黄福云[1] XUE Junqing;LI Zhexi;BRISEGHELLA Bruno;HUANG Fuyun(College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学土木工程学院,福建福州350108

出　　处：《贵州大学学报（自然科学版）》2021年第1期79-84,共6页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金资助项目(51508103,51778148,51578161)。

摘　　要：为提出适用于中国不同地域的桥梁混凝土主梁截面温度场数值模拟的太阳辐射计算方法,实地采集中国4座城市的逐时太阳辐射,与不同数值方法的计算值进行对比。建立中国12座桥梁的混凝土主梁截面有限元模型。结果表明:采用间接法计算的逐时太阳辐射与实测值吻合较好,但计算过程较为复杂,且可能出现太阳散射辐射为负数的情况;直接法中,采用美国ASHRAE方法和北京ASHRAE方法计算的逐时太阳辐射与实测值误差较大;采用H-L方法计算逐时太阳辐射建立有限元模型得到混凝土主梁截面温度计算值与实测值吻合良好。建议选用H-L方法为太阳辐射计算方法,开展位于中国不同地域的桥梁混凝土主梁截面温度场数值模拟研究。In order to propose the calculation method of solar radiation which can be applied for the numerical simulation of the temperature distributions on concrete girder cross-sections of the bridges in different regions of China,the hourly solar radiations of four cities in China measured on site were compared with those obtained by different calculation methods.The finite element models of the concrete girder cross-sections of twelve bridges in China were established.The results indicate that the agreements between the hourly solar radiations obtained by field tests and the indirect calculation methods were close.However,the calculation procedures of the indirect calculation methods are complicated.Moreover,the negative diffuse solar radiations may be obtained in some cases.For the direct calculation methods,the differences between the hourly solar radiations obtained by field tests and the American ASHRAE method and Beijing ASHRAE method were significant.The calculation method(H-L method)in which the hourly direct solar radiations and hourly diffuse solar radiations calculated by the Hottel model and the Liu-Jordan model,respectively,and the hourly global solar radiations calculated by adding them together,indicated close agreement with the measured data.Therefore,the H-L method was proposed as the calculation method of solar radiation to carry out the numerical simulation of the temperature distributions on concrete girder cross-sections of the bridges located in different regions of China.

关 键 词：桥梁工程 太阳辐射 计算方法 太阳总辐射 太阳直接辐射 太阳散射辐射 混凝土主梁截面温度场 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]