哈尔滨工程大学学报Issue(3)：327-331,373,6.DOI:10.3969/j.issn.1006-7043.201310070
铰接中心支撑钢框架阶形柱计算长度系数
Effective length factors of stepped columns in the concentrically braced steel frame with pinned connections
摘要
Abstract
With the research background of the concentrically braced steel frame with pinned connections for a typical main factory building of a large thermal power plant, the effective length factors for stepped columns were studied. Based on the small⁃deformation elastic stability theory, the effective length factor for the two⁃stepped column with one side pinned and another placed elastic support was derived and verified in comparison with the value calculated by the eigenvalue buckling analysis. The derived and calculated results are in good a⁃greement. Taking the 3⁃axis transverse frame selected from the large thermal power plant as an example, the effective length factor and stability bearing capacity for columns were verified by the eigenvalue buckling analy⁃sis and elasto⁃plastic buckling analysis. The results showed that the stability bearing capacity calculated by the numerical analysis is in good agreement with the theoretical value. For the columns in the concentrically braced steel frame with pinned connections, it is suggested that the effective length factor should be calculated by the derived formulas in this paper. The advantages are that the lateral displacement type of frame does not need to be judged firstly, and that the restriction effect of the upper and lower columns on the research column can be considered for the sideway columns.关键词
中心支撑钢框架/阶形柱/弹性支承/计算长度系数/稳定承载力/侧移属性Key words
concentrically braced steel frame/stepped column/elastic support/effective length factor/stability bearing capacity/lateral displacement type分类
建筑与水利引用本文复制引用
于海丰,张文元..铰接中心支撑钢框架阶形柱计算长度系数[J].哈尔滨工程大学学报,2015,(3):327-331,373,6.基金项目
国家自然科学基金资助项目（51208169，51178145）；河北省自然科学基金资助项目（ E2014208115）；河北科技大学五大平台开放基金资助项目（2014PT36）． （）
