建筑钢结构进展2023，Vol.25Issue(12)：50-63,72,15.DOI:10.13969/j.cnki.cn31-1893.2023.12.006
基于组合效应的圆钢管混凝土截面参数初选
Trial Parameter Design of Circular Concrete-Filled Steel Tubular Sections Based on Confinement Effect
摘要
Abstract
In order to rapidly select the sectional parameters of concrete-filled steel tubular members,a discussion on the matching of material strength combinations was conducted,by exploring the axial compression performance of stub columns that best reflects the confinement effect.Then,within the proposed range of this combination,the calculation methods of ultimate bearing capacity and residual bearing capacity coefficient of stub columns subjected to axial load were studied.Simultaneously,the combined characteristics of sectional parameters of the same ultimate bearing capacity and residual bearing capacity coefficient were investigated.The results show that proceeding from the fully playing confinement effect and the effective utilization of concrete strength,concrete should enter plasticity after steel tube and the delay time of that should not too be late.Within this combination limitation of material strengths,and without the case of ultra-thin-walled steel tube,the calculation method of ultimate bearing capacity,which confinement effect only considers the influence of concrete strength,is reasonable.According to the requirement that the strength loss of the available inelastic deformation should not be too low and the maximum utilization in material strength has been reached,the suggestion of the residual bearing capacity coefficient can be proposed.With the same ultimate bearing capacity and residual bearing capacity coefficient,the increase of concrete strength can better reduce outer diameter of the column or section weight and increase of steel strength can better reduce the steel consumption.关键词
钢管混凝土/截面参数/组合效应/强度组合/极限承载力/剩余承载力Key words
concrete filled steel tube/sectional parameter/confinement effect/strength combination/ultimate bearing capacity/residual bearing capacity分类
建筑与水利引用本文复制引用
罗霞,韦建刚,陈宝春,钱政鑫,姜辰辰..基于组合效应的圆钢管混凝土截面参数初选[J].建筑钢结构进展,2023,25(12):50-63,72,15.基金项目
国家自然科学基金(52278158),福建省自然科学基金(2022J05188),福建理工大学校级科研启动基金(GY-Z20174) （52278158）
