扣件式钢管满堂脚手架整体稳定试验与有限元分析

发布时间：2018-02-25 17:24

本文关键词： 扣件式满堂脚手架原型试验有限元分析极限承载能力破坏机理　出处：《建筑结构学报》2017年06期 　论文类型：期刊论文

【摘要】：通过7个模型静力试验,分析了均布荷载作用下超高扣件式钢管满堂脚手架的失稳机理和破坏模式,以及顶层杆件扣件连接方式、立杆步距、扣件拧紧力矩、非加载区域等参数对满堂脚手架极限荷载的影响。通过与采用JGJ 130—2011《建筑施工扣件式钢管脚手架安全技术规范》中满堂脚手架承载力计算公式的计算结果对比,发现试验值是规范公式计算值的1.56~3.75倍,表明规范计算公式偏于保守。建立考虑扣件半刚性和杆件初弯曲的有限元分析模型,其分析结果与试验结果吻合较好,证明了有限元方法可精确预测扣件式满堂脚手架的承载力和破坏模式。根据有限元分析获得的顶层扣件连接摩擦力的分布规律,建议满堂脚手架顶层扣件抗滑承载力计算的不均匀系数取值1.51。
[Abstract]:Through static test of seven models, the failure mechanism and failure mode of ultra-high fastener type steel tube full hall scaffold under uniform load are analyzed, as well as the connection mode of top member fastener, step distance of stand rod, tightening moment of fastener, etc. The influence of the parameters such as unloaded area on the ultimate load of the full hall scaffold is compared with the calculation results of the calculation formula of the bearing capacity of the full hall scaffold in JGJ 130-2011 < Safety Technical Specification for Steel Tubular scaffolding with fastener Type in Building Construction]. It is found that the experimental value is 1.56 ~ 3.75 times of the calculated value of the standard formula, which indicates that the formula is conservative. A finite element analysis model considering the semi-rigid fastener and the initial bending of the bar is established, and the analysis results are in good agreement with the test results. It is proved that the finite element method can accurately predict the bearing capacity and failure mode of the fastener type full hall scaffold. It is suggested that the non-uniform coefficient of the calculation of the skid bearing capacity of the top fastener of the full scaffold should be 1.51.
【作者单位】：天津大学建筑工程学院;中国建筑科学研究院;上海隧道工程有限公司;
【基金】：天津市城乡建设委员会科技项目(2015-4)
【分类号】：TU731.2

【相似文献】