中南大学学报（自然科学版）2018，Vol.49Issue(3)：684-695,12.DOI:10.11817/j.issn.1672-7207.2018.03.023
超大直筒−锥段型钢结构冷却塔内压效应
Effect of internal pressures for super large cylinder-conic section steel cooling towers
摘要
Abstract
Using the computational fluid dynamics (CFD) method the numerical wind tunnel was conducted to simulate a 189 m-high cylindrical-conical steel cooling tower, Asia's highest cooling tower that is still under construction. The features of the airflow around the typical cross-sections and its wake were extracted, and the distribution of mean wind loads along the internal surfaces of the cylindrical and conical sections was obtained. The functions for estimating the internal surfaces shape factors of the cylindrical and conical segments were obtained by fitting to the simulated data. Furthermore, finite element method was used to analyze the static wind-induced response of the cylindrical-conical steel cooling tower under internal pressure, external pressure, or both internal and external pressure. The effect patterns of internal pressures on the wind-induced responses of the main tube, stiffening trusses and auxiliary trusses of the tower were derived from the analysis results. The results show that the inner shape coefficient on the windward surface of the cone section is close to that of the straight section of similar value, but in other parts the deviation is great. The internal pressure effect has greater influence on the negative displacement of the structure, the axial force of the horizontal bar in the negative external pressure area of the main cylinder, the axial force of the auxiliary truss, and the axial force of the upper reinforcement truss.关键词
钢结构冷却塔/直筒−锥段型/数值风洞/平均风荷载/风致响应/内压效应Key words
steel cooling tower/cylinder−conic section/numerical wind tunnel/average wind pressure/wind-induced response/effect of internal pressure分类
建筑与水利引用本文复制引用
杜凌云,柯世堂..超大直筒−锥段型钢结构冷却塔内压效应[J].中南大学学报（自然科学版）,2018,49(3):684-695,12.基金项目
江苏省优秀青年基金资助项目(BK20160083) （BK20160083）
国家自然科学基金资助项目(51208254) （51208254）
中国博士后科学基金资助项目(2013M530255,1202006B) (Project(BK20160083) supported by the Excellent Youth Foundation Program of Jiangsu Province （2013M530255,1202006B）
Project(51208254) supported by the National Natural Science Foundation of China （51208254）
Projects(2013M530255, 1202006B) supported by the Postdoctoral Science Foundation of China) （2013M530255, 1202006B）
