支方主圆T形相贯节点轴压承载力计算公式

发布时间：2018-02-03 14:57

本文关键词： 钢管结构有限元 T形节点承载力公式参数分析　出处：《工程力学》2017年05期 　论文类型：期刊论文

【摘要】："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。
[Abstract]:Although the structure of T-shaped node of "supporting main circle" is similar to that of "supported H-circle", it is not consistent in the mechanism of force transfer. In order to realize the refined analysis of T-shaped intersecting joints, a "chord constraint method" analysis model is proposed, which can eliminate the effect of the bending effect of the chords. Thus the length of the excluded chord is obtained. The "real" bearing capacity, which reflects the performance of the joints, is affected by boundary conditions. 192 T-shaped joints and 192 H-supported main circles are selected. The parametric analysis of T-joints is carried out. The analysis and the corresponding experimental results show that. Compared with the T-shaped joints with "supporting H main circle", the bearing capacity of the T-shaped joints is more significantly affected by the longitudinal plate of web members. The results of parameter analysis show that the bearing capacity of T-joints is more significant than that of T-joints with "supporting H-circle". The calculation formula of CIDECT design guide conservatively estimates the bearing capacity of T-shaped joints with support principal circle. The formula is modified in this paper and the results are obtained with good accuracy.
【作者单位】：同济大学土木工程学院;
【基金】：《钢结构设计规范》国家标准管理组科研专项课题项目(GB500172010-06)
【分类号】：TU392.3
【正文快照】： 工程界对腹杆(支管)为矩形管、弦杆(主管)为圆管的钢管相贯节点(即“支方主圆”节点)的研究还并不成熟。国内规范[1 2]还没有相应的承载力计算规定,国际上则是将支方主圆节点采用与腹杆为H型截面、弦杆为圆管的节点(“支H主圆”节点)相同形式的承载力计算公式[3 5]。近期的

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