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(1 天津大學(xué)建筑學(xué)院， 天津 300072； 2 北京城建設(shè)計(jì)發(fā)展集團(tuán)股份有限公司， 北京 100037;  3 天津大學(xué)國(guó)際工程師學(xué)院， 天津 300072； 4 天津大學(xué)建筑工程學(xué)院， 天津 300072)

［摘要］超高層結(jié)構(gòu)常采用矩形鋼管混凝土柱，在太陽(yáng)輻射下，鋼管表面溫度最高可達(dá)到50℃左右，由于鋼材和混凝土的熱物理性能存在較大差異，以及太陽(yáng)輻射的非均勻性，導(dǎo)致鋼管壁的四面和核心混凝土溫度分布極不均勻，進(jìn)而會(huì)影響鋼管混凝土柱的受力。為了解太陽(yáng)輻射下矩形鋼管混凝土柱的截面溫度場(chǎng)分布，通過(guò)對(duì)矩形鋼管混凝土構(gòu)件截面布置溫度測(cè)點(diǎn)進(jìn)行了截面溫度場(chǎng)的實(shí)測(cè)，對(duì)構(gòu)件溫度分布進(jìn)行了分析。結(jié)果表明：方鋼管混凝土試件截面溫度場(chǎng)隨截面空間分布的非線性特征和時(shí)間變化的非線性特征顯著；鋼管表面各測(cè)點(diǎn)與中心測(cè)點(diǎn)及氣溫間溫度峰值出現(xiàn)的時(shí)間存在差異；截面溫度場(chǎng)為非均勻溫度場(chǎng)，截面中心溫度最低時(shí)整個(gè)截面溫度場(chǎng)的非線性特征表現(xiàn)最為顯著。

［關(guān)鍵詞］溫度場(chǎng)分布； 方鋼管混凝土； 太陽(yáng)輻射； 溫度監(jiān)測(cè)

中圖分類號(hào)：TU973-14文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)07-0080-06

Field measurement study on sectional temperature field of concrete-filled rectangular steel tube columns subjected to solar radiation

ZHOU Ting1, YANG Huijie2, HU Jianjun3, LIU Haonan4, LIU Hongbo4, CHEN Zhihua4

(1 School of Architecture, Tianjin University, Tianjin 300072, China;2 Beijing Urban Construction Design & Development Group Co., Ltd., Beijing 100037, China;3 Tianjin International Engineering Institute，Tianjin University, Tianjin 300072, China;4 School of Civil Engineering, Tianjin University, Tianjin 300072, China)

Abstract:The super-high-rise structure often adopts concrete-filled rectangular steel tube (CFST)columns, under the solar radiation, the steel pipe surface temperature may reach the highest about 50℃. Due to the large differences in the thermophysical properties of steel and concrete, and the non-uniformity of solar radiation, the temperature distribution of the four sides of the steel tube wall and the core concrete is extremely uneven, which will affect the stress of the concrete filled steel tube columns. In order to understand the distribution of cross section temperature field of CFST column under solar radiation, the temperature distribution of the CFST was analyzed by using the measured temperature field. The results show that the non-linear characteristics of the cross-section temperature distribution of concrete-filled square steel tube specimens with the spatial distribution of the cross-section and the non-linear characteristics of the time change are significant. There is a difference in the appear time of temperature peak between each measuring point on the steel tube surface and central measuring point and the temperature. The cross-section temperature field is a non-uniform temperature field, and the nonlinear characteristic of the entire cross-section temperature field is most significant when the cross-section center temperature is the lowest.

Keywords:temperature field distribution; concrete filled square steel tube; solar radiation; temperature monitoring

*中國(guó)博士后科學(xué)基金(2018M630274)。

作者簡(jiǎn)介：周婷，博士，副教授，zhouting1126@126.com