Comparative Analysis on Damage Mechanism of Two New Types of Concrete Filled Steel Tubular Lattice Wind Turbine Tower Joints

被引：0
作者：
Wen Y. [1 ]
Wu X. [1 ]
Xiong L. [2 ]
Xiong W. [1 ]
机构：
[1] School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou
[2] College of Architecture Engineering, Guangdong Business and Technology University, Zhaoqing
来源：
Hunan Daxue Xuebao/Journal of Hunan University Natural Sciences | 2023年 / 50卷 / 01期
基金：
中国国家自然科学基金;
关键词：
concrete-filled steel tube; finite element; static test; stress performance; wind power tower joints;
D O I：
10.16339/j.cnki.hdxbzkb.2023007
中图分类号：
学科分类号：
摘要：
This research was to find a more suitable joint form for the concrete filled steel tubular lattice wind power tower，two split spherical joints and two ellipsoidal joints were designed，and then the static test was conducted. Firstly，the failure mode of the two joints，the load-deformation curve of the web member，the stress distribution of the ball table，and the plate area of the ball table were compared and analyzed by controlling the change of the wall thickness of the ball table. Moreover，the parameters were expanded by ABAQUS. The results showed that the failure mode of the split spherical joint was the material strength failure and the plate buckling failure of the platform. Besides，the failure modes of ellipsoidal joints were the tear failure of the ball press plate and the bolt thread failure，and the elliptical joint showed higher ultimate bearing capacity. Compared with ellipsoidal joints，the stress distribution of split spherical joints was more uniform，the stress range was smaller，the material utilization rate was higher and the economy was better. When the wall thickness of the ball table increased from 6 mm to 10 mm，the ultimate bearing capacity of the two kinds of joints increased significantly；at the same time，when the stress level of the ball table of the split spherical joint decreased，the stress level of the pressure plate of the ball table increased significantly. The stress level of the ball table and the pressure plate of the ellipsoid joint decreased largely. The finite element analysis showed that the sensitivity of the ultimate bearing capacity of the joint to the wall thickness of the spherical platform was significantly reduced when the wall thickness of the spherical node and the ellipsoid node increased to 7 mm and 9 mm，respectively. © 2023 Hunan University. All rights reserved.
引用
收藏
页码：69 / 77
页数：8
相关论文
共 17 条
  • [11] YU Y., Mechanical behavior research on the bolt ball universal joints of concrete filled steel tubular lattice wind tower ［D］, pp. 21-31, (2018)
  • [12] CAI J Q．, Study on the mechanical behavior of universal Y-type joints of lattice wind tower with concrete filled steel tubular, pp. 16-32, (2019)
  • [13] QIAO M．, Mechanical behavior research on lattice wind turbine tower joints of concrete-filled steel tubular, pp. 21-35, (2012)
  • [14] YU J．, Study on the mechanical behavior of the flange disk ball joints of lattice wind tower with concrete filled steel tubular, pp. 16-25, (2020)
  • [15] Standard for design of steel structures, (2017)
  • [16] Standard for design of hign-rising structures, (2019)
  • [17] HAN L H．, Concrete filled steel tube structure：theory and practice, pp. 64-71, (2007)
12