摘要
为研究高强混合配筋砼柱的抗震特性,对相同尺寸的砼柱在不同砼类别、不同轴压比以及是否添加钢纤维或碳纤维增强塑料(carbon fiber reinforced plastic,CFRP)筋黏结等对照条件下进行抗震加载试验。采用控制变量法对比分析砼柱构件位移延性、刚度退化和耗能能力等抗震指标的变化规律。结果表明:高强混合配筋砼柱具有典型的延性破坏特征,添加钢纤维或CFRP筋可有效提高柱体承载能力和变形能力。砼强度越大,承载力越高,CFRP配筋率越大,变形能力越强,轴压比越大,承载能力越强。
To study the seismic characteristics of high-strength mixed-reinforced concrete columns,the seismic loading test is carried out for the same size concrete columns of different concrete types,different axial compression ratios,and with or without steel fiber or carbon fiber reinforced plastic(CFRP)reinforcement.The single variable method is used to compare and analyze the variations of the displacement ductility,the stiffness degradation and the energy dissipation capacity of concrete columns obtained in the experiments.It is found that the high-strength mixed reinforced concrete column shows typical ductile failure characteristics.Adding steel fibers or CFRP bars can effectively improve the bearing capacity and the deformation capacity of the column.When the concrete strength is greater,the bearing capacity is larger;when the CFRP reinforcement ratio is larger,the deformation capacity is larger;when the axial compression ratio is larger,the bearing capacity is larger.
作者
赵广旗
马乾瑛
王作虎
刘杜
ZHAO Guangqi;MA Qianying;WANG Zuohu;LIU Du(School of Civil Engineering,Chang’an University,Xi’an 710061,China;School of Civil and Transportation Engineering,Beijing University of Civil Engineering Architecture,Beijing 100044,China)
出处
《力学与实践》
北大核心
2020年第6期731-739,共9页
Mechanics in Engineering
基金
中央高校基本科研业务资助项目(310828161009)。
关键词
高强混合配筋砼柱
轴压比
抗震特性
high-strength mixed reinforced concrete column
axial pressure ratio
seismic characteristics
