建筑结构学报2026，Vol.47Issue(3)：203-215,13.DOI:10.14006/j.jzjgxb.2025.0271
中空夹层CFRP-钢复合管海水海砂混凝土短柱轴压性能试验研究
Axial compression performance of seawater and sea sand concrete-filled double-skin CFRP-steel composite tube columns
摘要
Abstract
To address the corrosion vulnerability and insufficient stability of double-skin concrete-filled steel tube members in chloride-rich marine environment,a seawater and sea sand concrete-filled double-skin CFRP-steel composite tube(SFDCT)column was proposed.Monotonic axial compression tests were conducted on 36 SFDCT columns and four concrete-filled double-skin steel tube reference specimens.The test parameters included CFRP layers,hollow ratio,and inner tube diameter-to-thickness ratio.The results show that increasing the CFRP layers can significantly improve the bearing capacity of the specimen,and the circumferential confinement of CFRP can effectively delay the buckling of the outer carbon steel tube.Specimens with smaller hollow ratios(0.51,0.67)exhibit up to a 21.9%higher bearing capacity and improved ductility compared to those with larger hollow ratios(0.85).The smaller the inner stainless tube diameter thickness ratio,the stronger the anti-buckling ability of the inner stainless tube.Considering the influence of CFRP on the yielding mechanism of composite columns,a theoretical formula for the minimum inner stainless tube thickness was derived to achieve the ideal failure mode in which the outer tube buckles first and the inner tube fails later,thereby fully exploiting the material capacity.On this basis,a formula for calculating bearing capacity for SFDCT columns was developed.It is more accurate than existing design models and can inform the design and application of such structures.关键词
中空夹层钢管混凝土/CFRP-钢复合管/海水海砂混凝土/单调轴压试验/轴压承载力Key words
double-skin concrete-filled steel tube/CFRP-steel composite tube/seawater and sea sand concrete/monotonic axial compression test/axial compressive bearing capacity分类
建筑与水利引用本文复制引用
葛子龙,张依睿,任驰,王立彬,魏洋..中空夹层CFRP-钢复合管海水海砂混凝土短柱轴压性能试验研究[J].建筑结构学报,2026,47(3):203-215,13.基金项目
国家自然科学基金项目(52408185),江苏省基础研究计划自然科学基金-青年基金项目(BK20240681),中国博士后面上基金(2024M761204),江苏省高等学校基础科学(自然科学)研究面上项目A类(24KJB560015). （52408185）
