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（天津大學濱海土木工程結(jié)構(gòu)與安全教育部重點實驗室， 天津 300072）
［摘要］對于有大型室外構(gòu)件或大面積透光性屋面的大跨鋼結(jié)構(gòu)，在時變太陽強烈輻射作用下，結(jié)構(gòu)經(jīng)歷的溫度效應(yīng)實質(zhì)是在輻射-熱-流多物理場耦合作用下的非均勻時變溫度效應(yīng)，往往會在結(jié)構(gòu)中引起較大的溫度變形和溫度應(yīng)力，成為結(jié)構(gòu)的控制荷載之一。從鋼材表面太陽輻射吸收系數(shù)、太陽輻射下鋼結(jié)構(gòu)溫度實測以及數(shù)值模擬方法、典型結(jié)構(gòu)形式和工程的太陽輻射非均勻溫度效應(yīng)研究等方面，總結(jié)和分析了空間結(jié)構(gòu)太陽輻射非均勻溫度問題的研究進展，提出低吸收高反射的新型涂料研發(fā)、結(jié)構(gòu)太陽輻射非均勻溫度作用簡化模型、地基-基礎(chǔ)-混凝土結(jié)構(gòu)-鋼結(jié)構(gòu)協(xié)同太陽輻射非均勻溫度效應(yīng)的精細化研究等3項亟待解決的關(guān)鍵課題，為進一步研究空間結(jié)構(gòu)太陽輻射非均勻溫度效應(yīng)提供了一定的思路和參考。
［關(guān)鍵詞］空間結(jié)構(gòu)； 太陽輻射； 吸收系數(shù)； 非均勻溫度作用； 非均勻溫度效應(yīng)
中圖分類號：TU398-1, TU317-103文獻標識碼：A文章編號：1002-848X(2017)16-0059-05
Study overviews of non-uniform thermal behavior of spatial structures under solar radiation
Liu Hongbo, Ying Jiaojie, Chen Zhihua
(Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China)
Abstract:Many large-span steel structures consist of big outdoor members or large light transmittance roofs. Under the effect of time-varying solar radiation, the temperature effect of the structure is the non-uniform time-varying temperature effect under the coupling of the radiation-heat-flow multi-physics field, which tends to cause large temperature deformation and temperature stress in the structure to become one of the structural control loads. The research progress of non-uniform temperature problem of the spatial structure under solar radiation was summarized and analyzed, based on the studies of the solar radiation absorption coefficient, the measured temperature of the steel structure under the solar radiation, the numerical simulation method, the non-uniform temperature effect of the typical structural form and engineering under the solar radiation. Three key issues that need to be solved urgently were proposed, including the research and development of new coatings with low absorption and high reflectivity, the simplified model of non-uniform temperature effect under solar radiation and the refinement study of the non-uniform temperature effect under solar radiation combined with the base-foundation-concrete structure-steel structure. This provided some ideas and references for further study of the non-uniform temperature effect of spatial structure under solar radiation.
Keywords:spatial structure; solar radiation; absorption coefficient; non-uniform temperature load; non-uniform temperature behavior
*國家自然科學基金 (51208355)。
作者簡介：劉紅波，博士，副教授，Email：hbliu@tju.edu.cn。
