Analysis of Non-Uniform Temperature Field of a 100-Meter-High Crossed Steel Arch Structure Under Solar Radiation
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摘要: 长期日照下,建筑结构温度场因太阳辐射角度变化、建筑遮挡和风速影响,呈现出明显的时空非均匀特征。为研究百米高大矢跨比交叉钢拱结构在太阳辐射下的温度场分布规律,在ANSYS Fluent Meshing模块中建立大矢跨比交叉钢拱结构的实体模型及流体域,模拟分析结构的瞬态温度场,对季节、太阳辐射强度、风速和两侧建筑物阴影遮挡等因素对结构瞬态非均匀温度场的影响规律进行参数化分析。结果表明:钢拱表面最高温度出现在14:00,变化趋势近似正弦函数,构件温度沿高度方向差异显著;较低辐射强度下表面最高温度相比高辐射强度下降21.4%;风速增大会降低表面温度,冬季降温效果明显高于夏季;建筑物阴影不会改变温度分布模式,但可使结构表面与环境温差减小11.99%~22.13%;结构温度场时变性与空间不均匀性显著。Abstract: Under long-term solar radiation, the temperature field of building structures exhibits significant spatiotemporal non-uniform characteristics due to changes in the solar radiation angle, building shading, and wind speed. To study the temperature field distribution of a 100-meter-high crossed steel arch structure large-rise-span under solar radiation, a solid model and fluid domain of the crossed steel arch structure large-rise-span were established in the ANSYS Fluent Meshing module. The transient temperature field of the structure was simulated and analyzed, and the effects of factors such as season, solar radiation intensity, wind speed, and shading from buildings on both sides on the transient non-uniform temperature field of the structure were parametrically analyzed. The results show: the highest temperature on the steel arch surface occurs at 14:00, with a variation trend approximately following a sine function, and the temperature of the components varies significantly along the height direction; under lower radiation intensity, the maximum surface temperature decreases by 21.4% compared with high radiation intensity; increasing wind speed lowers the surface temperature, with the cooling effect in winter being significantly greater than in summer; building shadows do not change the temperature distribution pattern, but they can reduce the temperature difference between the structure surface and the environment by approximately 11.99% to 22.13%. The structure's temperature field exhibits significant temporal variability and spatial non-uniformity.
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[1] 芦燕,王明威,宋浩然. 热弯残余应力对H型钢拱结构平面内稳定承载力的影响[J]. 天津大学学报(自然科学与工程技术版),2022,55(5):441-450. [2] 严仁章,万里源,周建庭,等. 索拱桁架-单层网壳复合空间结构的结构设计与稳定性分析[J]. 工业建筑,2020,50(4):103-110. [3] 何海玉,袁波,马信欣,等. 倒三角形截面板管连接式钢圆弧拱在平面内的稳定承载力研究[J]. 应用力学学报,2021,38(1):216-224. [4] 王树,黄季阳,刘鑫刚,等. 大跨度煤场封闭结构预应力体系研究[J]. 建筑结构学报,2022,43(5):51-61. [5] 刘哲,丁阳,宗亮. 环境温度对圆拱形钢结构模态频率的影响研究[J]. 天津大学学报(自然科学与工程技术版),2019,52(2):183-190. [6] 王锦涛,刘宇飞,樊健生,等. 大跨斜腿钢管桁架结构日照非均匀温度场研究[J]. 工程力学,2024,41(1):208-218. [7] 于洋,高磊,高华睿,等. 中承式系杆拱桥箱形钢拱肋温度场[J]. 建筑结构,2022,52(增刊1):1271-1277. [8] QIU H S,WU K K,AYASRAH M,et al. Study on sunlight temperature field of steel box arch ribs in irregular arch bridges[J]. Symmetry,2024,16(4):413-438. [9] HUANG S J,CAI C Z,ZOU Y F,et al. Non-uniform temperature fields in steel tubes with different inclinations under solar radiation[J]. Journal of Constructional Steel Research,2024,217:108-125. [10] ZHU Q X,WANG H,XU Z D,et al. Mapping temperature contours for a long-span steel truss arch bridge based on field monitoring data[J]. Journal of Civil Structural Health Monitoring,2021,11(3):725-743. [11] YAN X,LIU Y,LIU J,et al. Experimental and numerical investigation on vertical temperature gradient of concrete-filled steel tubular arch under sunlight[J]. Structures,2024,70:107550. [12] LIU J,LIU Y,ZHANG G,et al. Prediction formula for temperature gradient of concrete-filled steel tubular member with an arbitrary inclination[J]. Journal of Bridge Engineering,2020,25(10):1-4. [13] ZHOU Q,ZHOU J,FENG P,et al. Full-scale experimental study on temperature field of large-diameter CFST arch bridges under strong radiation and large daily ambient temperature difference[J]. Journal of Civil Structural Health Monitoring,2022,12(5):1247-1263. [14] ZHOU Q,FENG P,ZHOU J T,et al. Temperature field of concrete‐filled steel tubular arch bridges and its application[J]. Advances in Civil Engineering,2022,2022(1):1-19. [15] MCQUISTON F C,PARKER J D,SPITLER J D. Heating,ventilating and air conditioning:analysis and design[M]. Hoboken,NJ:John Wiley& Sons,2005. [16] DUFFIE J A,BECKMAN W A. Solar energy of thermal process[M]. New York:John Wiley& Sons,1991. [17] DILGER W H,GHALI A,CHAN M. Temperature stresses in composite box girder bridges[J]. Journal of Structural Engineering,ASCE,1983,109(6):1460-1478. [18] LIU H B,HAN Q H,CHEN Z H,et al. Precision control method for pre-stressing construction of suspen-dome structures[J]. Advanced Steel Construction,2014,10(4):404-425. [19] 王海花. 乌鲁木齐站大跨度网架结构的温度场及其温度效应分析[D]. 乌鲁木齐:新疆大学,2020. -
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