摘要
根据热传导理论与有限元分析方法,研究在日照作用下,太阳辐射、对流、热辐射3种热传导方式作用下的超高墩墩柱截面温度场计算方法。同时就气象参数、核心混凝土热工参数对截面温度分布的影响进行了参数敏感性分析。结果表明,在晴朗无云天气气候条件下,墩柱截面存在较大的非线性温差,最大正温差可达17℃以上,且墩柱表面太阳辐射吸收率对截面温差影响最大。
According to thermal transfer theory and finite element method, the calculation method of temperature field over the cross section of superelevation piers was derived due to the effect of solar radiation, convection and heat conduction. The parameter sensitivity analysis was conducted to investigate the temperature distribution of the pier cross-section including the meteorological parameters and the thermal parameters of core concrete. The results indicate that the nonlinear temperature difference is observed over the pier cross-section, the peak value up to 17 ℃ under the climate of clear weather, and the solar radiation absorptivity of the steel tube surface have much effect on temperature difference over the pier cross-section.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2008年第11期99-102,107,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50508034)
关键词
钢管膨胀混凝土
墩柱
日照
温度场
有限元
expansive concrete filled-steel tube
pier
solar radiation
temperature field
finite element
