建筑结构学报2025，Vol.46Issue(2)：132-140,9.DOI:10.14006/j.jzjgxb.2024.0158
低温环境下圆不锈钢管UHPC组合柱压弯性能研究
Study on eccentric compression performance of ultra-high performance concrete-filled stainless steel tube composite columns in low-temperature environments
摘要
Abstract
To study the eccentric compression performance of ultra-high performance concrete-filled stainless steel tube(UFCSST)columns,axial and eccentric compression tests on 16 UFCSST stub columns at different temperatures(-60 ℃,20 ℃)were conducted.The research indicates that reducing the environmental temperature from room temperature to-60 ℃ increases the axial compressive capacity and initial stiffness of UFCSSTs by 30.8％and 27.2％,but decreases the ductility by 6.0％.As the eccentricity increases,the failure mode of UFCSST columns gradually changes from compression-dominated to flexure-dominated.Based on a comparison between experimental results and predicted values from domestic and international standards,it is found that the relavant formulas in Eurocode 4 and AISC 360-16 provide conservative predictions of the compressive-bending capacity of UFCSST columns,while the predictions from GB 50936-2014 are found to be unsafe.Considering the pronounced strain-strengthening characteristics of stainless steel,a theoretical analysis model was proposed that accounted for both the strain-strengthening behaviour of stainless steel and the tensile behaviour of UHPC.The calculated results show good agreement with experimental results.关键词
钢管混凝土/超高性能混凝土/不锈钢/低温/偏心受压Key words
concrete-filled steel tube/ultra-high performance concrete/stainless steel/low temperature/eccentric compression分类
建筑与水利引用本文复制引用
严加宝,王子瑞,罗云标..低温环境下圆不锈钢管UHPC组合柱压弯性能研究[J].建筑结构学报,2025,46(2):132-140,9.基金项目
国家自然科学基金项目(52478195),黑龙江省重点项目(ZD2022E009). （52478195）
