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为了研究钢框架总水平位移与柱、梁、节点域变形之间的规律,以节点域高宽比、节点域宽度与层高比、柱与梁刚度比及结构跨高比等为主要研究参数,建立包括柱、梁、节点域的H型钢截面局部钢框架模型,并采用弹性分析方法进行研究。结果表明:节点域宽度与层高比相同、节点域高宽比增大时,梁水平位移比增大、节点域水平位移比减小、柱水平位移比变化不明显;结构跨高比增大时,节点域水平位移比增大,而梁水平位移量减小;节点域剪切变形引起的水平位移占模型总水平位移的30%左右;节点域宽度与层高比为0.1时,模型总水平位移比大于1,按现行不考虑节点域变形影响的基于位移抗震设计法计算时可能导致过小评价结构水平位移。
In order to study the regularity between the total horizontal displacement of steel frame and the deformation of columns, beams and nodes, the main research parameters are the aspect ratio of nodes, the width and height ratio of nodes, the stiffness ratio of columns and beams and the span ratio of structures , A local steel frame model of H section section including columns, beams and nodes was established and studied by using elastic analysis method. The results show that the node width and layer height ratio are the same. When the aspect ratio of nodes increases, the horizontal displacement ratio increases, the horizontal displacement ratio decreases and the column horizontal displacement ratio does not change obviously. , The horizontal displacement ratio of node domain increases while the horizontal displacement of beam decreases; the horizontal displacement caused by shear deformation of node domain accounts for about 30% of the total horizontal displacement of model; when the width and height ratio of node domain is 0.1, When the horizontal displacement ratio is greater than 1, displacement based on the displacement-based seismic design method that does not consider the influence of the deformation of the node may lead to underestimation of the horizontal displacement of the structure.