同济大学学报（自然科学版）2025，Vol.53Issue(12)：1825-1836,12.DOI:10.11908/j.issn.0253-374x.24267
轴压下冷弯薄壁不规则八边形高强钢管短柱的极限承载力
Load-Bearing Capacity of Irregular Octagonal Cold-Formed Thin-Walled High-Strength Hollow Steel Tube Stub Columns
摘要
Abstract
Eight axial compression tests on irregular octagonal hollow section columns were conducted,along with material tensile tests on the material extracted from different regions of tube.The experimental results indicate that the failure mode of irregular octagonal cold-formed thin-walled hollow steel stub columns is local buckling instability,and their load-bearing capacity cannot reach their yield strength.Finite element analysis was also performed on the steel tubes,validating the accuracy of the finite element model with experimental results,followed by parameter analysis to supplement the experimental data.The experimental data and finite element model results were used to evaluate the existing cross-section capacity formulas in Chinese,European,and American standards,as well as those reported in the existing literature.The evaluation results indicate that the existing formulas are not suitable for calculating the capacity of irregular octagonal thin-walled high-strength hollow steel tube stub columns.Therefore,a new formula was proposed.The test data and finite element model results were compared with the calculated results of the proposed formula,demonstrating that the proposed formula can accurately predict the capacity of the specimens.关键词
薄壁高强钢/轴压试验研究/局部屈曲/参数研究/极限承载力计算Key words
thin-walled high-strength steel/axial compression test study/local buckling/parametric study/ultimate bearing capacity calculation分类
建筑与水利引用本文复制引用
朱炯亦,黄海超,刘海鑫,杨钦..轴压下冷弯薄壁不规则八边形高强钢管短柱的极限承载力[J].同济大学学报（自然科学版）,2025,53(12):1825-1836,12.基金项目
国家自然科学基金青年科学基金(52208317) （52208317）
