【摘要】 冷弯薄壁型钢结构多采用有效截面法对构件承载力进行计算,该方法计算繁杂且未考虑构件的畸变屈曲性能。直接强度法采用全截面计算各类参数,能够考虑各种单独屈曲模式及其相关屈曲对构件稳定性能的影响,但目前该方法并不能应用于压弯构件。对冷弯薄壁C形钢绕强轴偏压构件的稳定性能进行参数分析,探讨了构件长度、偏心距、腹板高厚比、翼缘宽厚比和卷边高厚比等因素对构件承载力的影响规律。结合有限元分析结果,基于轴压构件和纯弯构件的直接强度法公式,提出了冷弯薄壁型钢绕强轴偏压构件的极限承载力计算方法。更多还原

【Abstract】 Effective section method(ESM)is widely used in the design of cold-formed steel structures.However,the influence of distortional buckling of members was hot considered.A new method for the load carrying capacity of cold-formed steel members,direct strength method(DSM),can effectively estimate the ultimate strength for local,distortional buckling and interactive buckling.However,it is not used for beam-columns.The stability behavior of C-shaped cold-formed members eccentrically compressed around the major axis was analyzed.The effects of Length of member,eccentricity and width-thickness ratio of webs,flanges and edge stiffeners on ultimate strength of members were examined in this study.A calculation method of ultimate strength was proposed based on the original DSM axial compression/bending formulas and the finite element analysis results.更多还原