连墙件布置对脚手架整体稳定承载力的影响

Influence of Arrangement of Tie Members on Overall Stability of Scaffolds

目的研究不同连墙件布置对悬挑脚手架整体稳定承载力的影响,为专项方案设计提供依据.方法对扣件节点采用半刚性连接,利用有限元分析软件ANSYS模拟脚手架的第一阶失稳模态以及临界荷载,分析不同连墙件布置对脚手架整体稳定承载力的影响.结果从有限元分析软件ANSYS模拟中得到不同连墙件布置下的第一阶失稳模态以及临界荷载,当连墙件布置为两步两跨时整体稳定承载力比两步三跨提高4.728%,比三步三跨提高62.65%.当连墙件布置为两步三跨时整体稳定承载力比三步三跨提高60.79%.结论当施工处于100m以上时,连墙件应优先采用两步两跨或两步三跨,不宜采用三步三跨.当脚手架搭设需要减小连墙件间距时,减小竖向间距比减小纵向间距对架体稳定承载力的提高更有效.

The purpose is to study the overall stability of cantilevered scaffold and its influence of different tie member arrangement,so as to provide the basis for the design of special program.The semi-rigid coupler connection was used to calculate the scaffold,and the finite element analysis software ANSYS was used to simulate the first-order buckling mode and critical buckling load of scaffold,and analyze the influence of different tie member arrangements on the overall stable bearing capacity of scaffolds.The first-order buckling mode and critical buckling load of different tie members arrangements are obtained from the ANSYS simulation.When the tie members is arranged as two lift height and two longitudinal spacing,the overall stable bearing capacity is 4.728 % higher than that of two lift height and three longitudinal spacing,It is 62.65% higher than that of the three lift height and three longitudinal spacing.When the tie member is arranged as two lift height and three longitudinal spacing,the overall stable bearing capacity is 60.79% higher than that of three lift height and three longitudinal spacing.when the construction is more than 100 meters,the tie member should have the priority of two lift height and two longitudinal spacing,or two lift height and three longitudinal spacing,and should not be used the three lift height and three longitudinal spacing.when the spacing between the tie member needs to be reduced.Reducing the vertical spacing is more effective than reducing the longitudinal spacing to improve the stability bearing capacity of the scaffold.