Effect of Chord Load On Ultimate Strength of CHS X-Joints
Effect of Chord Load On Ultimate Strength of CHS X-Joints
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DOI：
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发表时间：
2007-12
影响因子：
0.8
通讯作者：
G. J. Vegte;J. Wardenier;Y. Makino
中科院分区：
文献类型：
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作者：
G. J. Vegte;J. Wardenier;Y. Makino
由于圆钢管和矩形钢管相贯节点的计算方法不一致，对圆钢管平面K型、T型和X型相贯节点的弦杆应力效应进行了大量的数值研究。这些研究的目的是建立弦杆应力函数，使用最大弦杆应力作为RHS节点方法的主要参数。目前的研究提出了有限元（FE）分析的结果，在轴向支撑荷载下的弦杆承受（i）轴向荷载，（ii）面内弯矩，或（iii）组合的轴向荷载和面内弯矩的单平面X型节点。对16种几何参数组合（支撑宽度与弦杆宽度比）和2种几何参数组合（弦杆宽度与弦杆壁厚比）的弦杆应力效应进行了评估。基于现有的有限元数据，首先，建立了一个新的强度公式X型节点在轴向支撑荷载下。此外，还推导了弦杆应力函数，该函数描述了弦杆轴向荷载和面内弯矩对X型节点极限承载力的综合影响。这些公式将被纳入经更新的IIW建议（2008年）。
Due to inconsistencies between the approaches for circular hollow section (CHS) and rectangular hollow section (RHS) joints, extensive numerical research has been conducted into the chord stress effect of CHS uniplanar K-, Tand X-joints. The objective of these studies is to establish chord stress functions using the maximum chord stress as the major parameter in line with the approach for RHS joints. The current study presents the results of finite element (FE) analyses on CHS uniplanar X-joints under axial brace load with the chord subjected to (i) axial load, (ii) in-plane bending moment, or (iii) combinations of axial load and in-plane bending moment. The chord stress effect is evaluated for 16 combinations of the geometric parameters (brace width to chord width ratio) and 2 (chord width to chord wall thickness ratio). Based on the available FE data, first, a new strength formulation is established for X-joints under axial brace load solely. In addition, a chord stress function is derived, describing the combined effect of axial chord load and in-plane bending chord moment on the ultimate strength of uniplanar X-joints. These formulae will be included in the updated IIW recommendations (2008).