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结合新加坡植物园展览温室结构中铸钢节点的初始设计方案,对该铸钢节点进行了足尺静力加载试验和有限元分析,研究了其承载力、刚度、应力分布和破坏机理。材性试验结果表明,此类铸钢材料宜采用线性强化塑性本构模型。通过比较试验和有限元分析得到的节点荷载-挠度曲线以及应力分布可以得出,有限元计算与试验结果吻合良好,文中建立的有限元模型能够很好地分析铸钢节点的受力性能。基于研究结果对该类铸钢节点的设计提出了建议,为实际工程应用提供了参考。
Based on the initial design of the cast steel node in the greenhouse structure of Singapore Botanic Garden, the full-scale static loading test and finite element analysis of the cast steel node were carried out. The bearing capacity, stiffness, stress distribution and failure mechanism were studied. Material test results show that such cast steel materials should adopt linear plasticity constitutive model. The results of load-deflection curve and stress distribution of the joints obtained by comparative experiments and finite element analysis can be drawn. The results of FEM and experimental results are in good agreement. The finite element model established in this paper can well analyze the mechanical behavior of cast steel joints. Based on the research results, some suggestions are put forward for the design of this kind of cast steel node, which provides a reference for the practical engineering application.