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为研究扣件式钢管模板支架的力学性能,对模板支架空间结构体系进行一系列足尺试验研究,得到不同工况下模板支架的极限承载力、破坏模式及顶层节点的荷载-位移曲线。可以看出:5个工况中,工况1因未设置剪刀撑而使其承载力最小;由于步距的减小,工况4的稳定承载力较工况3提高13.8%;而横距的减小,使工况5的稳定承载力较工况4提高3%;模板支架的失稳属整体失稳,剪刀撑的布置对其失稳模式有着重要的影响,在后续的研究中,尚需确定模板支架的标准构造,然后对其开展一系列的试验和理论研究;模板支架属于钢结构范畴,建议在设计计算时,采用有侧移框架理论并考虑节点的半刚性对其进行设计计算。
In order to study the mechanical properties of the fastener-pipe formwork, a series of full-scale tests on the formwork structure of the formwork were carried out. The ultimate bearing capacity, failure mode and load-displacement curve of the formwork under different conditions were obtained. It can be seen that in the five conditions, the bearing capacity of working condition 1 is the least due to the absence of scissors props. The stable bearing capacity of working condition 4 is 13.8% higher than that of working condition 3 due to the reduction of the working distance. The horizontal distance , The steady bearing capacity of condition 5 is increased by 3% compared with that of condition 4. The instability of the template support is an overall instability, and the arrangement of scissors stays has an important influence on the destabilizing mode. In the following research, Still need to determine the standard structure of the template support, and then carry out a series of experimental and theoretical studies; template support belongs to the category of steel, it is recommended in the design calculation, the use of a side-shift frame theory and consider the semi-rigid design of the node Calculate.