| 高宽比较大的扣件式钢管脚手架整体稳定性研究及应用 |
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| 引用本文： | 张家贤,李开福,张元涛,汤道清.高宽比较大的扣件式钢管脚手架整体稳定性研究及应用[J].长春工程学院学报(自然科学版),2016,17(4):11-15. |
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| 作者姓名： | 张家贤 李开福 张元涛 汤道清 |
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| 作者单位： | 湖南大学建筑学院,长沙 410010;云南建工第四建设有限公司,云南 曲靖 655002;云南建工第四建设有限公司,云南 曲靖,655002;中南大学图书馆,长沙,410010 |
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| 摘 要： | 分析了高宽比较大的扣件式钢管脚手架的受力特点,用弹簧单元替代直角扣件这种特殊的半刚性连接方式,引入弹簧单元的伸缩系数及转动刚度,建立了线弹性格构式柱计算模型,利用半刚性连接的钢框架模型计算单位水平力作用下层间相对位移,推导出该模型的失稳屈曲荷载计算公式.对高宽比等于27.3的扣件式钢管脚手架,采用MIDAS GEN有限元软件建立模型进行数值分析,获取失稳屈曲荷载值,并对比简化计算结果,可知公式的计算精度能满足工程设计及校核的需要.
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| 关 键 词： | 扣件式脚手架 半刚性 伸缩系数 转动刚度 钢框架 线弹性 失稳 有限元 |
The Application Research on Overall Stabilityof Steel Tubular Scaffolding with a Great Aspect Tatio |
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| Abstract: | In this article,the features of forces applied on steel tubular scaffolds with couplers which have greater aspect ratio are researched.The linear spring lattice column computing model is established with a special semi-rigid connection that spring elements are used to replace right-angle couplers and by introducing the telescopic coefficient and rotating rigidity of the spring unit.Under a unit horizontal force,the relative displacement between two layers is calculated with semi-rigidly connected steel frame model,and,the formula is deduced for calculating the buckling loads of this model.And,the modeling is made for value analysis to attain the values of buckling loads with MIDAS GEN finite elements software based on steel tubular scaffolds with couplers with an aspect ratio of 27.3.By comparison to the results of the simplified calculation,the calculating accuracy of the formula may meet the needs of engineering design and verification. |
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| Keywords: | fastener type scaffolding semi rigid telescopic coefficient rotational rigidity steel frame linear elasticity instability finite element |
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