建筑钢结构进展2025，Vol.27Issue(6)：23-34,12.DOI:10.13969/j.jzgjgjz.20231230001
方中空夹层钢管混凝土叠合构件受弯性能试验研究与有限元分析
Experimental Study and Finite Element Analysis on Flexural Performance of Square Concrete-Encased Concrete-Filled Double-Skin Steel Tubular Members
摘要
Abstract
This paper proposes a novel composite member,namely a square concrete-encased concrete-filled double-skin steel tubular(CECFDST)member.Bending tests were first carried out on 3 groups of 6 CECFDST specimens under different shear-span ratios,to explore the failure modes,mechanical response processes,deformation laws,and influence of shear-span ratio.Then,a finite element model was developed to conduct the stress analysis and parametric analysis of the flexural members,and its accuracy was verified.The research results reveal that the CECFDST members exhibit good flexural behavior,showcasing good cooperation between the components.The influence of shear-span ratio on bending process and flexural performance was not significant,in which the change in Mu was less than 4.5%.Increasing the concrete-filled double-skin steel tube(CFDST)ratio(Do/B)and nominal steel ratio(αn)of the CFDST component could effectively improve the moment ratio and strength utilization efficiency.The external reinforcement ratio(ρ)and αn should be coordinated with Do/B in a positive and inverse relationship,respectively.It is recommended that 0.50≤Do/B≤0.75,0.25≤χ≤0.75 and 0.06≤αn≤0.20.关键词
中空夹层钢管混凝土叠合构件/受弯性能/受弯试验/剪跨比/有限元分析/构造要求Key words
concrete-encased concrete-filled double-skin steel tube/flexural behavior/bending test/shear-span ratio/finite element analysis/configuration requirement分类
土木建筑引用本文复制引用
李明伦,任庆新,王庆贺,丁纪楠..方中空夹层钢管混凝土叠合构件受弯性能试验研究与有限元分析[J].建筑钢结构进展,2025,27(6):23-34,12.基金项目
国家自然科学基金(51808351),辽宁省应用基础研究计划(2022JH2/101300130),辽宁省"兴辽英才计划"项目(XLYC1902027),辽宁省教育厅博士启动项目(LJ212410153011),辽宁省科学技术计划(2024-BS-121) （51808351）
