氯盐侵蚀作用后钢-FRP复合筋混凝土柱偏心受压性能试验研究  

Experimental study on eccentric compression behavior of steel-FRP composite bars RC columns subjected to chloride corrosion

作　　者：帅华国 朱世鑫 葛文杰[2] 倪增昊 ASHRAF Ashour SHUAI Huaguo;ZHU Shixin;GE Wenjie;NI Zenghao;ASHRAF Ashour(Yangzhou University Engineering Design and Research Institute Co.,Ltd.,Yangzhou 225009,China;College of Civil Science and Engineering,Yangzhou University,Yangzhou 225127,China;Faculty of Engineering&Informatics,University of Bradford,Bradford BD71DP,UK)

机构地区：[1]扬州大学工程设计研究院有限公司,扬州225009 [2]扬州大学建筑科学与工程学院,扬州225127 [3]布拉德福德大学工程与信息学院,布拉德福德BD71DP

出　　处：《建筑结构》2024年第23期79-89,共11页Building Structure

基　　金：科技部“高端外国专家引进计划”项目(G2022014054L);江苏省自然科学基金资助项目(BK20201436);江苏省住建厅建设系统科技资助项目(2018ZD047、2021ZD06);扬州市住建系统科技项目(2022ZD03、202204);扬州市市校合作专项(YZ2022194、YZU212105)。

摘　　要：为研究氯盐侵蚀作用后钢-FRP复合筋(SFCB)混凝土柱偏心受压性能,对经氯盐侵蚀后的SFCB及SFCB混凝土偏心受压柱进行力学性能试验。研究了配筋类型、配筋率、偏心距、长细比、应力水平与侵蚀时间对承载力、侧向变形、裂缝和破坏形态的影响。结果表明:筋材强度保留率随侵蚀时间增加而降低,无应力侵蚀180d后,钢筋、SFCB和FRP筋极限强度分别降低了12.2%、9.9%和3.6%;随筋材截面含钢率的增加,SFCB混凝土偏心受压柱承载力逐渐提高,侧向变形逐渐减小;侵蚀后钢筋组、SFCB组和FRP筋组试件极限承载力分别较其未侵蚀试件最大下降16.6%、12.4%和7.2%。SFCB混凝土柱具有良好的抵抗侧向变形和裂缝的能力。In order to investigate the eccentric compression behaviors of steel-FRP composite bar(SFCB)reinforced concrete(RC)columns subjected to chloride corrosion,the mechanical experiments of chloride corroded SFCB and SFCB RC eccentric compression columns were conducted.The effect of reinforcement type,reinforcement ratio,eccentricity,slenderness,stress level and corrosion duration on bearing capacity,deformation,crack and failure pattern were investigated.The results show that the strength retention ratio of reinforcement decreases with the increase of corrosion duration,the ultimate strengths of steel bar,SFCB and FRP bar decreased 12.2%,9.9%and 3.6%respectively.With the increase of steel content of reinforcement,the bearing capacity of SFCB RC eccentric compression column increases while the deformation decreases gradually.The ultimate bearing capacity of corroded steel bar,SFCB and FRP specimens maximally decreases 16.6%,12.4%and 7.2%respectively,when compared with those of uncorroded specimens.SFCB RC columns exhibit good deflection and crack resistance.

关 键 词：混凝土柱 钢-FRP复合筋 偏心受压 氯盐侵蚀 承载力 

分 类 号：TU377.9[建筑科学—结构工程]