【摘要】 脚手架是承受上部结构自重与提供作业平台的重要支撑结构，为了提高构件利用率并加快施工进度，提出了一种具有早拆功能的脚手架体系。考虑立柱与横梁连接节点的半刚性，计算了早拆节点的转动刚度，推导了半刚性节点条件下立柱的计算长度系数计算公式;考虑插管-套管立柱的变截面，计算了变截面立柱的等效惯性矩;开展了考虑半刚性节点与变截面立柱的早拆脚手架体系屈曲分析。结果表明:立柱高度相同时，随着套段长度的增加，脚手架体系屈曲承载力增加;套管长度相同时，随着立柱高度的增加，脚手架体系屈曲承载力迅速降低;早拆脚手架体系屈曲荷载受立柱间距影响不显著，随着立柱间距的增加，屈曲荷载小幅度降低。更多还原

【Abstract】 Scaffolding is a critical support structure that bears the self-weight of the upper structure and provides a working platform. To improve component utilization and accelerate construction progress,a scaffolding system with early dismantlement functionality was proposed. Considering the semi-rigidity of the connections between columns and beams,the rotational stiffness of the early dismantlement joints was calculated,and formulas for the effective length factor of columns under semi-rigid joint conditions were derived. Taking into account the variable cross-section of the inserted tube-sleeve tube columns,the equivalent inertia moment of such columns was computed. A buckling analysis of the early dismantlement scaffolding system was conducted,incorporating semi-rigid joints and variable cross-section columns. The results indicate that with the same column height,the buckling load-bearing capacity of the scaffolding system increases as the length of the sleeve segment increases. When the sleeve length remains constant,the buckling load-bearing capacity decreases rapidly with an increase in column height. The buckling load of the early dismantlement scaffolding system is not significantly affected by column spacing,showing only a slight decrease as the column spacing increases.更多还原