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为研究柱列支撑体系的受力性能和验证有限元方法分析该问题的可靠性,对带有不同初始几何缺陷分布的单层和双层柱列支撑体系进行静力模型试验研究。研究结果表明:由于试验模型中柱和水平撑杆的初始几何缺陷的随机分布,水平撑杆受压力或拉力也是随机的;双层柱列支撑体系的极限承载力高于单层柱列支撑体系的极限承载力,且双层柱列支撑体系中的水平撑杆减小柱的计算长度超过柱高的一半;柱列支撑体系的失稳破坏是由于单柱失稳破坏引发的。采用有限元模型对试验进行了模拟验证,计算结果与试验结果吻合良好。
In order to study the mechanical behavior of the column-column system and verify the reliability of the finite element method, the static model test of single-layer and double-column column systems with different initial geometric defect distributions is carried out. The results show that due to the random distribution of the initial geometric defects of the column and the horizontal strut in the experimental model, the horizontal strut is also subject to pressure or tension. The ultimate bearing capacity of the double column strut system is higher than that of the single column strut system The ultimate bearing capacity of the double-column system is less than half of the height of the column. The failure of the column-column system is caused by the failure of the single column. The finite element model is used to simulate the experiment, and the calculated result is in good agreement with the experimental result.