华南理工大学学报（自然科学版）2025，Vol.53Issue(8)：87-99,13.DOI:10.12141/j.issn.1000-565X.240443
UHPC全包裹Q690高强型钢组合短柱轴压性能研究
Study on Axial Compression Performance of UHPC Fully Encased Q690 High-Strength Steel Composite Stub Columns
摘要
Abstract
To investigate the axial compression performance and strain compatibility of UHPC fully encased Q690 high-strength steel composite stub columns,this study designed,fabricated,and tested seven specimens under axial compression.The research parameters included the internal arrangement of steel wire mesh,the volume content of UHPC steel fibers,the stirrup spacing,and the cross-section type of steel profiles.It investigated the deformation failure process,ultimate failure mode,and peak bearing capacity of each specimen.The results showed that the UHPC fully encased Q690 high-strength steel composite stub columns exhibited excellent axial compression bea-ring capacity and deformation performance,and the strain compatibility between core UHPC and Q690 high-strength steel can be achieved at peak load.By referring to the bearing capacity calculation methods mentioned in various national codes,including China,Europe,and the United States,theoretical calculations of the axial compression ul-timate bearing capacity of the UHPC fully encased Q690 high-strength steel composite stub columns were con-ducted and the results were compared with the experimental results.It shows that Tthe calculated results are in good agreement with the experimental results,providing a reference for calculating the axial compression bearing ca-pacity of UHPC fully encased Q690 high-strength steel composite stub columns.关键词
UHPC/Q690高强型钢/组合短柱/轴压性能/箍筋间距Key words
UHPC/Q690 high-strength steel/composite stub column/axial compressive performance/stirrup spacing分类
建筑与水利引用本文复制引用
李涛,贺政博,魏国正,曹鸿猷..UHPC全包裹Q690高强型钢组合短柱轴压性能研究[J].华南理工大学学报（自然科学版）,2025,53(8):87-99,13.基金项目
国家重点研发计划项目(2021YFC3100800) （2021YFC3100800）
国家自然科学基金项目(51908437)Supported by the National Key R&D Program of China(2021YFC3100800)and the National Natural Science Foundation of China(51908437) （51908437）
