摘要
为研究高层建筑CFRP加固钢筋混凝土柱结构构件的抗震性能,室内展开了不同尺寸的未加固、CFRP加固的钢筋混凝土的分级增量加载振动试验,深入探讨了CFRP材料对钢筋混凝土柱构件抗震性能的影响。试验结果表明:(1)CFRP复合材料大幅提高钢筋混凝土柱构件的变形能力,相较于未加固的钢筋混凝土柱构件,不同尺寸的CFRP加固钢筋混凝土柱的最大位移相对分别提高33.56%、7.09%、21.78%,延性系数分别相对提高20.85%、31.24%、35.35%;(2)CFRP加固钢筋混凝土柱构件在反复加载过程中吸收地震能量的能力更强,其滞回曲线的滞回环更加饱满;(3)振动荷载作用下,钢筋混凝土柱构件的相对刚度随着粘性系数的增大而不断降低但降低速度逐渐变慢,相对刚度与粘性系数之间成负指数函数关系;CFRP加固构件的刚度衰减更慢,变形能力较好;(4)钢筋混凝土柱的归一化承载力随构件尺寸增大而逐渐降低,归一化变形能力随构件尺寸增大而逐渐升高。
In order to study the seismic performance of reinforced concrete columns strengthened with CFRP,the vibration tests of different sizes of unreinforced and CFRP strengthened reinforced concrete columns were carried out in the laboratory.The size effect and the influence of CFRP materials on the seismic performance of reinforced concrete columns are discussed in depth.The results show that:(1)compared with the unreinforced reinforced concrete columns,the maximum displacement of the reinforced concrete columns with different sizes is increased by 33.56%,7.09%and 21.78%respectively,and the ductility coe fficient is increased by 20.85%,31.24%and 35.35%respectively.(2)In the process of repeated loading,the ability of absorbing seismic energy of reinforced concrete columns strengthened by CFRP is stronger,and the hysteretic loop of its hysteretic curve is more full.(3)Under the action of vibration load,the relative stiffness of reinforced concrete columns decrease with the increase of the viscosity coe fficient,but the decreasing speed become slower,and the relationship between the relative stiffness and the viscosity coefficient is negative exponential function;the stiffness of the members strengthened by CFRP decrease more slowly,and the deformation ability is better.(4)The normalized bearing capacity of reinforced concrete columns decrease with the increase of component size,and the normalized deformation capacity increase with the increase of component size.
作者
李培
LI Pei(Business School,Shanghai Jianqiao University,Shanghai 201306,China)
出处
《合成材料老化与应用》
2021年第6期72-74,92,共4页
Synthetic Materials Aging and Application
基金
上海市教育委员会应用型本科试点专业建设项目(工程管理专业)(项目编号:Z30011-17-02)。
关键词
CFRP
钢筋混凝土柱
工程抗震性能
试验研究
刚度退化
CFRP composite
reinforced concrete column
engineering seismic performance
experimental study
stiffness degradation
作者简介
李培,讲师,硕士研究生,毕业于上海师范大学,主要研究方向为BIM技术应用及建筑结构抗震等。
