建筑结构学报2017，Vol.38Issue(7)：42-50,9.DOI:10.14006/j.jzjgxb.2017.07.006
G550高强冷弯薄壁Z形钢受弯构件承载力试验与直接强度法研究
Tests and direct strength method for bearing capacity of G550 high-strength cold-formed thin-walled Z-section steel flexural members
摘要
Abstract
In order to investigate the flexural behavior of high-strength cold-formed thin-walled steel members and develop the direct strength method (DSM),static tests of twelve G550 high-strength cold-formed thin-walled Z-section steel flexural specimens with inclined,upright and complex edge stiffeners were conducted.It is shown that edge stiffener type has a significant effect on the buckling mode and bending strength of the specimens and the interaction between local and distortional buckling or distortional buckling occurs.The upright edge stiffener specimen exhibits a higher bearing capacity than the inclined one and the complex Ⅱ edge stiffener specimen exhibits a higher bearing capacity than the complex Ⅰ one.According to the test results and existing abroad DSM formulas,the revised DSM formulas of the bearing capacity of G550 high-strength cold-formed thin-walled Z-section steel flexural members were established when the interaction between local and distortional buckling occurred.It is not necessary to modify the existing DSM formulas when the distortional buckling occurs.The tests were simulated by finite element analysis,and the simulation results agree well with the test results.It is verified that the revised DSM formulas could provide safer and more reliable prediction of bearing capacity of this kind of member than the existing DSM formulas through a large number of finite element analysis results.关键词
高强冷弯薄壁Z形钢/卷边形式/静力试验/受弯承载力/直接强度法Key words
high-strength cold-formed thin-walled Z-section steel/edge stiffener type/static test/bending strength/direct strength method分类
建筑与水利引用本文复制引用
赵金友,王钧,王全邦..G550高强冷弯薄壁Z形钢受弯构件承载力试验与直接强度法研究[J].建筑结构学报,2017,38(7):42-50,9.基金项目
中央高校基本科研业务费专项项目(2572017CB01),黑龙江省自然科学基金项目(E2015056). （2572017CB01）
