暴露环境下矩形钢管混凝土构件截面温度场实测研究  

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

作　　者：周婷[1] 杨慧杰 胡建军 刘浩男 刘红波[4] 陈志华[4] ZHOU Ting;YANG Huijie;HU Jianjun;LIU Haonan;LIU Hongbo;CHEN Zhihua(School of Architecture,Tianjin University,Tianjin 300072,China;Beijing Urban Construction Design&Development Group Co.,Ltd.,Beijing 100037,China;Tianjin International Engineering Institute,Tianjin University,Tianjin 300072,China;School of Civil Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学建筑学院,天津300072 [2]北京城建设计发展集团股份有限公司,北京100037 [3]天津大学国际工程师学院,天津300072 [4]天津大学建筑工程学院,天津300072

出　　处：《建筑结构》2020年第7期80-85,共6页Building Structure

基　　金：中国博士后科学基金(2018M630274)。

摘　　要：超高层结构常采用矩形钢管混凝土柱,在太阳辐射下,钢管表面温度最高可达到50℃左右,由于钢材和混凝土的热物理性能存在较大差异,以及太阳辐射的非均匀性,导致钢管壁的四面和核心混凝土温度分布极不均匀,进而会影响钢管混凝土柱的受力。为了解太阳辐射下矩形钢管混凝土柱的截面温度场分布,通过对矩形钢管混凝土构件截面布置温度测点进行了截面温度场的实测,对构件温度分布进行了分析。结果表明:方钢管混凝土试件截面温度场随截面空间分布的非线性特征和时间变化的非线性特征显著;钢管表面各测点与中心测点及气温间温度峰值出现的时间存在差异;截面温度场为非均匀温度场,截面中心温度最低时整个截面温度场的非线性特征表现最为显著。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.

关 键 词：温度场分布 方钢管混凝土 太阳辐射 温度监测 

分 类 号：TU973.14[建筑科学—结构工程]