摘要
采用环向预应力碳纤维条带加固钢筋混凝土圆柱,能够对核心混凝土提供主动约束,避免纤维复合材料的应力滞后,显著提高柱的承载力、延性和抗震性能.为模拟预应力碳纤维条带加固钢筋混凝土圆柱拟静力试验的非线性响应过程,利用有限元软件ABAQUS的实体单元建立了圆柱的有限元模型,对其滞回曲线和骨架曲线等进行了分析,并将其结果与试验结果进行比较;最后进行了预应力度、轴压比对加固效果的参数影响分析.结果表明,实体单元有限元模型可以较好地模拟预应力碳纤维条带加固钢筋混凝土圆柱在低周往复荷载作用下的非线性响应,使用预应力CFRP加固能够提高钢筋混凝土圆柱的抗震性能.
After strengthened with pre-stressed carbon fiber reinforced polymer（ CFRP） strips,core concrete can be actively confined,stress hysteresis of CFRP strips can be reduced,and bearing capacity,ductility and seismic behavior of circular RC columns can be significantly improved. In order to obtain nonlinear response process of circular RC columns strengthened with prestressed CFRP strips in pseudo-static experiment,the nonlinear finite element models of circular RC columns were established by solid element in software ABAQUS,hysteretic curves and skeleton curves of them were analyzed and compared with test results,the strengthening effect of pre-stress degree,the axial compression ratio on hysteretic performance of circular RC columns strengthened with pre-stressed CFRP strips were observed. The results show that ABAQUS based finite element analysis can simulate hysteretic curves and skeleton curves of circular RC columns strengthened with pre-stressed CFRP strips well in cycling load. The seismic performance of circular RC columns strengthened with pre-stressed CFRP strips could be improved.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2015年第3期586-595,共10页
Journal of Basic Science and Engineering
基金
国家自然科学基金面上项目(51478033
51178029)
关键词
滞回性能
钢筋混凝土圆柱
预应力碳纤维条带
主动约束
有限元分析
hysteretic behavior
circular concrete column
pre-stressed CFRP strips
active constraint
finite element analysis
