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梁柱节点转角对钢框架的内力和变形及其梁与柱构件的设计有着重要的影响。由于研究环境和研究方法的差异,国内外研究者大多采用自己定义的节点转角和测量计算方法,其测量得到的节点转角中大多包括梁与柱变形的影响,使已取得的大量研究成果在其适用性和可比性上存在较大的不足。该文比较分析了目前国内外学者提出的钢框架梁柱节点转角定义和测量计算方法,对全焊接节点及栓焊混接节点提出了改进的节点转角测量计算方法,并验证其精确性和可行性;随后采用较为合适的节点简化理论模型,结合节点转角测量计算方法进行整体分析,讨论其准确性。有限元分析结果显示该文建议的3种节点转角测量计算方法具有很高的精度,而选取节点域斜向弹簧模型进行整体框架的简化分析时,不仅可以考虑节点转动的影响,而且其分析计算结果具有很高的精确性。
The angle of beam-column joints has an important influence on the internal forces and deformation of the steel frame and the design of beam and column members. Due to the differences of research environment and research methods, researchers at home and abroad mostly use their own definition of node rotation angle and measurement calculation method. Most of the measured node angles include the influence of beam and column deformation, and a great deal of research results have been obtained Applicability and comparability there is a big deficit. This paper comparatively analyzes the definition and calculation method of the angle of beam-column joints proposed by domestic and foreign scholars at present, and proposes an improved calculation method of node angle measurement for all-welded joints and hybrid joints, and verifies its accuracy and feasibility Then use the more appropriate node to simplify the theoretical model, combined with node angle measurement and calculation methods for overall analysis to discuss its accuracy. The results of finite element analysis show that the method proposed in this paper has high accuracy for the calculation of the corner measurement of three kinds of nodes. When the simplified analysis of the whole frame is selected by the oblique spring model of the node domain, not only the influence of node rotation but also the analysis and calculation The result is highly accurate.