Study on Effective Length Factors of Flexural Stiffness Released Columns with Elastic Lateral Supports
摘要
The impact of lateral supporting stiffness on the column effective length factor and the critical lateral supporting stiffness value at which a column can be treated as sidesway inhibited in modular building systems is unclear due to the release of flexural stiffness at each column end. According to elastic buckling analysis results of 34,650 columns models of which each end is flexural released to a series of levels, and joints are restrained by a series of values of lateral supporting stiffness and a series of values of restraining beam stiffness, the length factor calculation method which considers the impact of lateral supporting stiffness for this type column is proposed. Critical lateral supporting stiffness values at which the column can be treated as sidesway inhibited are found. Furthermore, the safety checking process for this type of column is illustrated through a case study to guide the design of columns in steel modular buildings.