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通过对旋转盘口式扣件桁架进行足尺场地堆载试验研究,结果表明:在试验加载条件下桁架整体承载性能良好,受力及变形呈现对称性;杆件连接间隙对桁架挠度和杆件应力影响较大。基于旋转盘口式扣件桁架试验数值模型,应用有限元软件对桁架进行分析,旋转盘口式扣件桁架计算值与试验值吻合较好,建模和计算方法可行;对桁架进行施工安全分析,在分段施工过程中,桁架最大挠度和最大承载力均出现在第三阶段,且均满足要求。
The results show that the whole truss has good bearing capacity and symmetrical stress and deformation under the condition of experimental loading. The connection between the truss of the truss and the deflection of the truss and the bar Stress greater impact. Based on the numerical model of the truss test of the rotating disc fastener, the truss was analyzed by using the finite element software. The calculated value of the truss of the rotating disc fastener was in good agreement with the experimental value, and the modeling and calculation method were feasible. The construction safety analysis During the construction stage, the maximum deflection and the maximum bearing capacity of truss appear in the third stage, and all meet the requirements.