轮扣式钢管支模架节点连接性能试验研究
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摘要
设计轮扣式钢管支模架节点半刚性水平力加载试验。选用3组试件,通过对试验现象和所得数据的分析及与扣件式钢管脚手架节点刚度的对比分析,得到结论:轮扣式钢管脚手架节点具有典型的半刚性连接特性,轮扣式钢管脚手架节点的半刚性受不同搭设间距的影响较小;当节点弯矩在控制弯矩的20%以下时,节点的初始连接刚度变化波动略大;当超过20%时,节点连接刚度曲线趋于稳定一致;得到的3组试件节点的连接刚度相当于扣件式钢管脚手架在扣件拧紧力矩40 N.m时的连接刚度。轮扣式钢管脚手架连接稳定性好,搭设质量优于传统的扣件式钢管脚手架。
It was designed an experiment on semi-rigid horizontal force joints of pulley-clip supporting frame through three groups of specimens.By the analysis of experimental phenomena and data as well as the comparisons with joints rigidity of steel tubular scaffolding,following conclusions were obtained: the joints of pulley-clip supporting frame are typical semi-rigid connections,its semi-rigidity is little affected by the different erection distances;the fluctuation of initial connection stiffness of joints is slightly large,when the joint moment is lower than the 20 percent of the control moment;but with over 20 percent of the control moment,the connection stiffness tends towards to be steady;the connection stiffness of the three groups of specimens is equivalent to that of steel tubular scaffolding with tightening torque of 40 N·m,and the stability and erection quality of pulley-clip supporting frame is better than the traditional steel tubular scaffolding.
It was designed an experiment on semi-rigid horizontal force joints of pulley-clip supporting frame through three groups of specimens.By the analysis of experimental phenomena and data as well as the comparisons with joints rigidity of steel tubular scaffolding,following conclusions were obtained: the joints of pulley-clip supporting frame are typical semi-rigid connections,its semi-rigidity is little affected by the different erection distances;the fluctuation of initial connection stiffness of joints is slightly large,when the joint moment is lower than the 20 percent of the control moment;but with over 20 percent of the control moment,the connection stiffness tends towards to be steady;the connection stiffness of the three groups of specimens is equivalent to that of steel tubular scaffolding with tightening torque of 40 N·m,and the stability and erection quality of pulley-clip supporting frame is better than the traditional steel tubular scaffolding.
引文
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[3]谢征勋.建筑工程事故分析与论证[M].北京:地震出版社,1996.
[4]胡新六.建筑工程倒塌案例分析与对策[M].北京:机械工业出版社,2004.
[5]王力争,方东平.中国建筑业事故原因分析及对策[M].北京:中国水利水电出版社,2007.
[6]黄浩.插销式钢管脚手架半刚性节点及基本受力单元体试验研究[D].重庆:重庆大学,2006.
[7]European Committee for Standardization.CEN.Eurocode3,Design of Steel Structures,Part 1.8:Design of Joint.prEN1993—1—200[S].
[8]郭正兴,陈安英.基于反分析理论的扣件式钢管支模架节点刚度试验研究[C]//中国建筑学会施工委员会模板与脚手架专业委员会2007年年会论文集,2007:25-34.
[9]袁雪霞,金伟良,鲁征,等.扣件式钢管支模架稳定承载能力研究[J].土木工程学报,2006,39(5):43-50.
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