To study the general law between steel frame elastic deformation and column-beam deformation,the most common column and beam cross joint connecting local frame was used as the analysis model,and column-beam stiffness ratio,story height-span ratio,beam-column section height ratio and flange-web section area ratio on either side of H-section members were adopted as the main parameters.The mechanical mechanism of common local steel frame was follow studied by the means of stress and deformation analysis.The research results are as follows: the column deformation to model deformation ration,decreases with the increase of column-beam stiffness ratio and beam-column section height ratio,but increases with the story height-span ratio;meanwhile the beam deformation to total deformation ration,increases with the column-beam stiffness ratio and beam-column section height ratio,but decreases with the story height-span ratio;when the H-section was adopted as the column section,the column deformation to model deformation ration trends to increase.%为了研究钢框架弹性变形与柱、梁变形之间的一般规律,以常见的钢框架结构中的柱、梁连接处十字形局部框架作为分析模型,以柱梁刚度比、楼层高跨比、梁柱截面高度比以及H型截面构件任一侧翼缘与腹板的截面积比等为主要研究参数,通过受力与变形分析,探讨了典型局部钢框架的力学机理.结果表明:局部框架变形中,柱变形与总变形比值,随柱梁刚度比和梁柱截面高度比的增大而减小;随着框架楼层高跨比的增大而增大;而梁变形与总变形比值,随柱梁刚度比和梁柱截面高度比的增大而增大;随着框架楼层高跨比的增大而减小;柱为H型截面时柱变形与总变形比值有增大的趋势.
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