建筑结构学报2024，Vol.45Issue(10)：97-106,10.DOI:10.14006/j.jzjgxb.2023.0325
HRB635高强箍筋约束高强钢筋混凝土短柱轴压性能试验研究
Experimental investigation on axial compressive performance of high-strength concrete short columns reinforced by HRB635 longitudinal rebar and stirrups
摘要
Abstract
In order to study the mechanical properties of high-strength reinforced concrete short columns constrained by high-strength stirrups under axial compression and the compatibility between the three materials,the axial compression tests of 11 high-strength reinforced concrete short columns constrained by high-strength stirrups of HRB635 were carried out,and the influences of the strength of concrete,longitudinal reinforcement strength,and the volume stirrup ratio on the axial compression performance of columns were investigated.The results show that the axial compression capacity and stiffness of columns mainly increase with the increase of the volume ratio of high-strength stirrups and the concrete strength.The high-strength stirrups do not yield at the peak load,so the stirrup strength has little impact on the axial compression capacity,and the stirrup strength does not need to be considered when calculating the axial compression capacity,but it significantly improves the ductility of the specimen.When HRB635 high-strength longitudinal bars work together with concrete below C60,the longitudinal bars do not yield at the peak load,making it difficult to fully utilize its strength.Therefore,HRB635 high-strength longitudinal bars should be used together with concrete above C60.In addition,the calculated axial compressive capacity of reinforced concrete columns constrained by high-strength stirrups using the formula in GB 50010-2010 and ACI 318-14 for reinforced concrete columns is too conservative.Collecting the existing relevant test data,the calculation formula for the axial compressive load capacity of reinforced concrete columns was modified,considering the hoop reinforcement and high-strength longitudinal reinforcement not yielding,and the calculation results are in good agreement with the experimental results.关键词
轴压短柱/高强钢筋/高强混凝土/轴压性能/约束效应/承载力计算Key words
short column of axial pressure/high-strength hot rolled steel bar/high-strength concrete/axial compression performance/confinement effect/bearing capacity calculation分类
建筑与水利引用本文复制引用
王静峰,高建发,刘用,沈奇罕,崔玉博,魏滔锴..HRB635高强箍筋约束高强钢筋混凝土短柱轴压性能试验研究[J].建筑结构学报,2024,45(10):97-106,10.基金项目
国家自然科学基金项目(52108130). （52108130）
