【摘要】 随着水电建设重心的西移,太阳辐射量的计算,对高寒地区混凝土施工过程仿真计算具有重要影响。在无辐射数据统计的地区,需要采用太阳辐射模型进行计算。总结了ASHRAE模型、HOTTEL模型、KEHLKECK模型和COLLARES-PEREIR&RABL模型,给出了太阳瞬时辐射量的计算方法;以在建桐子林工程为例,计算了基于以上模型连续6天日照后混凝土导流墙的温度场。结果表明:不同模型计算的瞬时辐射强度最多相差187 W/m2,温度值差别为2.1℃;与不考虑日照相比,日照使混凝土表面温度最多上升了14.8℃,对结构的影响深度为2 m,极易导致过流导墙开裂;上述4个模型的辐射量差别基本可以忽略。更多还原

【Abstract】 The solar radiation calculation has great influence on the simulation calculation of concrete construction process in cold areas when the hydropower project construction has moved to western regions.When lacking of observation data,the solar radiation need to be calculated by solar radiation model.The calculation methods of transient solar radiation based on ASHRAE model,HOTTEL model,KEHLKECK model and COLLARES-PEREIR&RABL model are presented,and taking Tongzilin Hydropower Project as case study,the temperature field of concrete guide wall under 6-day solar radiation is analyzed by using above four models.The results show that:(a) the maximum difference of instant solar radiation intensity based on four models are no more than 187 W/m2,while the temperature difference no more than 2.1 ℃;(b) the surface temperature rise is not more than 14.8 ℃ caused by sunshine and the influence reaches 2 m deep,which makes the guide wall easy to crack;and(c) the differences of radiations calculated by above four models can be ignored.更多还原