复合材料科学与工程Issue(4)：57-67,11.DOI:10.19936/j.cnki.2096-8000.20250428.007
低周反复荷载作用下芯钢管连接的PVC-CFRP管混凝土柱-RC梁边节点应变分析
Study analysis of PVC-CFRP confined concrete column-RC beam exterior joints with core steel tube under low cyclic loading
摘要
Abstract
In order to analyze the strain development law of the PVC-CFRP confined concrete column-RC beam exterior joints with core steel tube,through low cyclic tests of ten exterior joints with core steel tube(CST)and one typical joint.The effects of the steel ratio of the CST,stirrup ratio of the joint,axial compression ratio,lon-gitudinal reinforcement ratio of the beam,and CFRP strips spacing were analyzed.The test results show that shear failure occurred at the joints,while no damage occurred at the PVC-CFRP confined concrete columns and beams.In the early stage,the shear force of the joint is mainly borne by the concrete;when the specimen bearing capacity reaches the peak bearing capacity,the diagonal pressure of the joint is still borne by the concrete,while the joint's ring stirrups and the column's longitudinal reinforcement jointly bear the diagonal tension.The CST can directly par-ticipate in the shear resistance.The calculating formula of the joint shear bearing capacity is proposed by considering the influence of the steel ratio of the CST,stirrup ratio of the joint,and axial compression ratio are considered,and introducing the comprehensive influence coefficient of joint shear resistance.The calculated results agree well with the experimental data.关键词
PVC-FRP管混凝土/节点/钢管混凝土/破坏形态/应变分析/受剪机理/复合材料Key words
PVC-FRP confined concrete/joint/concrete-filled steel tubular/failure mode/strain analysis/shear mechanism/composites分类
通用工业技术引用本文复制引用
于峰,施坤,管玉聪,方圆,许波..低周反复荷载作用下芯钢管连接的PVC-CFRP管混凝土柱-RC梁边节点应变分析[J].复合材料科学与工程,2025,(4):57-67,11.基金项目
国家自然科学基金(52078001) （52078001）
安徽省科技重大专项项目(202203a07020005) （202203a07020005）
安徽省重点研发计划(2022i01020005) （2022i01020005）
安徽省高校优秀科研创新团队(2023AH010017) （2023AH010017）
安徽省高校协同创新项目(GXXT-2023-061,GXXT-2022-074) （GXXT-2023-061,GXXT-2022-074）
安徽理工大学芜湖技术创新研究院(2022jc04) （2022jc04）
