碳纤维增强复材部分包裹圆钢管混凝土短柱偏压性能研究  

RESEARCH ON THE ECCENTRIC COMPRESSIVE BEHAVIOR OF CFRP PARTIALLY-WRAPPED CIRCULAR CFST STUB COLUMNS

作　　者：沈奇罕 王静峰[1] 廖飞宇 黄春晓 王伟 SHEN Qihan;WANG Jingfeng;LIAO Feiyu;HUANG Chunxiao;WANG Wei(School of Civil and Hydraulic Engineering,Hefei University of Technology,Hefei 230009,China;College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China;College of Civil and Environmental Engineering,Anhui Xinhua University,Hefei 230088,China;Anhui Water Supply and Drainage Design Institute Co.,Ltd.,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]福建农林大学交通与土木工程学院,福州350002 [3]安徽新华学院土木与环境工程学院,合肥230088 [4]安徽给排水设计研究有限公司,合肥230009

出　　处：《工业建筑》2019年第10期192-199,共8页Industrial Construction

基　　金：国家自然科学基金项目(51478158);教育部新世纪优秀人才支持计划(NCET-12-0838)

摘　　要：为探究CFRP部分包裹钢管混凝土短柱的偏压力学性能,进行了9根CFRP部分包裹圆钢管混凝土短柱和1根圆钢管混凝土短柱的偏压试验,通过ABAQUS软件建立了偏压作用下CFRP部分包裹圆钢管混凝土短柱的数值分析模型,开展了CFRP部分包裹圆钢管混凝土短柱偏压性能的参数分析研究,包括构件材料强度、偏心距e、径厚比D/t、包裹层数n、包裹间距b、包裹宽度a、柱截面面积A sc和CFRP预紧力系数P/P f等,揭示了其在偏压荷载下的典型破坏模式,探讨了CFRP部分包裹圆钢管混凝土偏压短柱的有效加固机制。研究结果表明:CFRP部分包裹圆钢管混凝土短柱在偏压作用下的主要破坏模式包括钢管局部屈曲、CFRP断裂、混凝土开裂和局部压溃,其偏压承载力随着材料强度、包裹层数和柱截面面积的增加而增大,并随着径厚比、CFRP包裹间距和偏心距的增大而减小。To explore the behavior of carbon fiber reinforced polymer(CFRP)partially-wrapped CFST stub columns,a series of test including 9 CFRP partially-wrapped CFST stub columns and 1 bare CFST stub column under eccentric compression were conducted.A finite element(FE)modeling of the type of composite column under eccentric compression was established via ABAQUS solver.Following this,the effect of material strength,load eccentricity,diameter-to-thickness ratio,CFRP layer,CFRP spacing,CFRP width,cross-sectional area and CFRP pre-tightening force on the eccentric performance of circular CFST stub column partially-wrapped by CFRP was estimated.Besides,the failure modes and effective wrapping scheme of the composite column were revealed.The experimental results indicated that the failure patterns of CFRP partially-wrapped circular CFST stub columns included CFRP rupture,steel tube local buckling and core concrete crumbling and cracking.The eccentric strength of the type of composite column was heightened by the material strength,CFRP layer and cross-sectional area increasing,while opposite results were observed with the increase of diameter-to-thickness ratio,CFRP spacing and load eccentricity.The studies will provide a considerable and scientific basis for employing CFRP in CFST structures.

关 键 词：CFRP 部分包裹 圆钢管混凝土短柱 偏压性能 破坏模式 

分 类 号：TU3[建筑科学—结构工程]