摘要
针对某大型双曲面钢结构冷却塔工程,采用棋盘式四角锥双层网壳、正交正放四角锥双层网壳和交叉桁架双层网壳3种不同结构体系进行方案比选。结果表明:棋盘式四角锥体系较其他两种结构体系用钢量少,稳定性能更好;通过对15个不同厚度和网格尺寸的棋盘式体系的冷却塔模型进行对比分析,得出了网壳厚度和网格尺寸对结构用钢量和稳定性能的影响规律;选取冷却塔上受力较复杂的节点,采用有限元方法分析其承载力,建议按节点承载力不低于构件承载力的原则对节点采取加强措施。
In order to develop the layout optimization for a large steel hyperboloid cooling tower,three structural forms（i. e.,chessboard spatial square pyramid grid,orthogonal spatial square pyramid grid and intersected truss grid）,were compared. It was revealed that the chessboard spatial square pyramid grid could achieve higher structural stability and lower use of material than other two structural forms. A total of fifteen models with different grid sizes and shell thicknesses were established to study the influences of material usage and structural stability. By use of the finite element method,the bearing capacity of a tubular joint with complicated load conditions was analyzed. Strengthening measures for the joint were proposed on the basis of the principle that the bearing capacity of the joint stronger than that of the connected structural members.
作者
刘武
杜新喜
程晓燕
林士凯
袁焕鑫
LIU Wu;DU Xinxi;CHENG Xiaoyan;LIN Shikai;YUAN Huanxin(School of Civil Engineering, Wuhan University, Wuhan 430072, Chin)
出处
《钢结构》
2018年第5期92-97,共6页
Steel Construction
基金
中央高校基金科研业务费专项资金项目(2042016kf1125)
关键词
钢结构冷却塔
棋盘式四角锥网壳
结构选型
相贯节点
steel cooling tower
chessboard spatial square pyramid grid
structure selection
tubular joint
