建筑钢结构进展2025，Vol.27Issue(2)：64-73,122,11.DOI:10.13969/j.jzgjgjz.20230829001
杆式折叠结构的设计与受力性能分析
Design and Mechanical Performance Analysis of Rod Folding Structure
摘要
Abstract
In order to realize the folding and unfolding of the house and meet its bearing capacity requirement,a new type of rod folding structure was proposed based on traditional scissor hinged folding structure.Firstly,a new rod folding structure was designed and optimized,and the spiral theory was used to analyze the degree of freedom of the new rod folding structure.At the same time,an ABAQUS finite element model with a height of 2.2 m was established,and vertical load in plane was applied to obtain the initial stiffness,ultimate bearing capacity and failure mode of the folding structure under different hinge constraint conditions,steel strength grades,apertures of pin shaft,wall thicknesses of channel steel column and rod widths.Finally,stability analysis of the folding structure was carried out and design suggestions were proposed.The results show that when the height-to-width ratio of the folding structure after unfolding is 1/√2,the maximum folding rate of the structure can be achieved.The degree of freedom of the mechanism during the unfolding process of the folding structure is 1,and when it is fully expanded,the degree of freedom of the structure is negative after applying certain articulation constraints.The secondary stressed members and apertures of pin shaft have little effect on the initial stiffness and ultimate bearing capacity of the structure.Increasing the steel strength grade,the wall thickness of channel steel columns,and width of the main stressed members can enhance the initial stiffness and ultimate bearing capacity of the structure,but excessive increase leads to structural instability failure.To avoid structural instability,this can be achieved by promoting plastic hinge formation and changing specific members to box sections.关键词
折叠结构/有限元模拟/螺旋理论/荷载-位移曲线/稳定性分析Key words
folding structure/finite element simulation/spiral theory/load-displacement curve/stability analysis分类
建筑与水利引用本文复制引用
刘俊锋,刘艳芝,朱德举,王涛..杆式折叠结构的设计与受力性能分析[J].建筑钢结构进展,2025,27(2):64-73,122,11.基金项目
湖南省自然科学基金(2023JJ30142),长沙市自然科学基金(kq2208033),山东省科技型中小企业创新能力提升工程项目(2021TSGC1175),湖湘高层次人才聚集工程-创新人才(2021RC5005) （2023JJ30142）
