碳纤维增强复合材料-方钢管混凝土柱抗震性能研究  

Research on Seismic Performance of Concrete-Filled Square Steel Tubular Columns with CFRP Profiles

作　　者：邱增美 张涛 李帼昌[1] 李孟鸽 QIU Zengmei;ZHANG Tao;LI Guochang;LI Mengge(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《工业建筑》2024年第6期141-148,共8页Industrial Construction

基　　金：国家自然科学基金项目(52108160);辽宁省博士科研启动基金计划项目(2021-BS-167);辽宁省教育厅基本科研项目(LJKZ0566)。

摘　　要：为研究碳纤维增强复合材料(CFRP)-方钢管混凝土柱的抗震性能,进行了3根CFRP-方钢管混凝土柱的低周往复荷载试验,以含钢率为变化参数阐述了其加载过程及破坏模式。应用ABAQUS有限元分析软件,在合理选用材料本构关系的基础上,建立数值分析模型,并通过与试验结果进行对比,验证了所建模型及其建模方法的准确性。通过建立大量精细化的数值模型,考虑了不同钢材屈服强度、混凝土抗压强度、含钢率、长细比以及是否内置CFRP型材等参数,研究其对组合柱荷载-位移滞回曲线、荷载-位移骨架曲线、刚度、承载力等性能指标的影响规律。结果表明:新型组合柱的滞回曲线比较饱满,没有出现明显的捏缩现象,表现出良好的抗震性能;与普通方钢管混凝土柱相比,新型组合柱具有较好的延性、承载能力和耗能能力;混凝土抗压强度的改变对组合柱的极限承载力影响较小,其极限承载力会随着钢材屈服强度与含钢率的增大而显著提高,方钢管壁厚每增加1 mm,其极限承载力依次提高14.3%、8.3%,其耗能值依次提高14.3%、10.7%;当长细比由32.33增长至50.81时,其极限承载力与耗能值分别降低了41.2%、60.8%,因此建议应合理控制长细比的取值。In order to investigate the seismic performance of concrete-filled square steel tubular columns with CFRP(C-CFST),three columns with CFRP were tested under quasi-static load with steel ratio as the parameter.The changing parameter of the composite columns is steel ratio.The loading process and failure modes of the composite columns were described.ABAQUS finite element analysis software was used to establish a numerical analysis model on the basis of rational selection of material constitutive relations.Compared with the experimental results,the accuracy of the model and its modeling method were verified.By establishing a large number of refined numerical models,considering different parameters such as yield strength of steels,compressive strength of concrete,steel ratio,slenderness ratio,and whether I-shaped CFRP profiles are built in,the influence of these parameters on the load-displacement hysteretic curve,load-displacement skeleton curve,stiffness,bearing capacity and other performance indicators of composite columns was studied.The results showed that the hysteretic curve of the new composite column was relatively full,there was no obvious pinch phenomenon,and it showed a good seismic performance;compared with ordinary CFST tubular columns,the new composite columns had better ductility,bearing capacity and energy dissipation capacity;the change of concrete compressive strength had little effect on the ultimate bearing capacity of composite columns,and the ultimate bearing capacity would increase significantly with the increase of steel yield strength and steel ratio;when the wall thickness of square steel pipe increased by 1 mm,the ultimate bearing capacity increased by 14.3%,8.3%,and the energy dissipation value increased by 14.3%,10.7%;when the slenderness ratio increased from 32.33 to 50.81,the ultimate bearing capacity and energy dissipation decreased by 41.2%and 60.8%,respectively.Therefore,it is suggested that the slenderness ratio should be reasonably controlled.

关 键 词：CFRP型材 方钢管混凝土柱 数值分析 抗震性能 承载力 

分 类 号：TU398.9[建筑科学—结构工程] TU352.11