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“支方主圆”T形节点与“支H主圆”T形节点虽然在结构形式上相近,但是在传力机理方面并不一致,两者承载力存在较大的差异。为了实现对T形相贯节点的精细化分析,该文提出了一种能消除节点弦杆弯曲效应影响的“弦杆约束法”分析模型,从而获得排除弦杆长度、边界条件等影响的单纯反映节点自身性能的“真实”承载力。共对192个“支方主圆”T形节点和192个“支H主圆”T形节点进行了参数化分析。分析与对应的试验结果表明,与“支H主圆”T形节点相比,“支方主圆”T形节点承载力受到腹杆纵向板的影响更为显著。参数分析结果发现,CIDECT设计指南的计算公式偏保守地估计了支方主圆T型节点的承载力。该文对该公式进行了修正,所得结果获得良好精度。
Although the structural form of “T” and “T” are similar, the mechanism of force transmission is not the same, and there is a big difference between the two bearing capacity. In order to refine the analysis of the T-shaped joints, a “chord constraint method” analysis model is proposed to eliminate the effect of chord bending on the chord, so as to eliminate the influence of chord lengths and boundary conditions The “true” bearing capacity that simply reflects the performance of the node itself. A total of 192 “branch main circle” T-shaped nodes and 192 “branch H main circle” T-nodes were parametrically analyzed. The analysis and the corresponding test results show that the bearing capacity of the T-shaped node of the main circle is more significantly affected by the longitudinal web of the web than that of the main H-shaped T-branch. Parametric analysis found that the calculation formula of CIDECT design guideline conservatively estimated the bearing capacity of main T circle node. In this paper, the formula was revised, the results obtained good accuracy.