地震作用下BFRP筋珊瑚混凝土柱刚度及延性分析  

Analysis of Stiffness and Ductility of Coral Concrete Columns Reinforced with BFRP Reinforcement Under Earthquake Action

作　　者：李虎林 陈爽 LI Hulin;CHEN Shuang(School of Civil and Architectural Engineering,Guilin University of Technology,Guilin 541004,China;School of Civil and Architectural Engineering,Guangxi University of Science and Technology,Liuzhou 545006 China)

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004 [2]广西科技大学土木建筑工程学院,广西柳州545006

出　　处：《洛阳理工学院学报（自然科学版）》2024年第3期21-28,共8页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：设计了6个BFRP筋全珊瑚混凝土柱,对试件的破化形态、刚度退化和延性进行了分析;探讨了配筋率、轴压比和体积配箍率3个因素对其的影响,并与普通钢筋增强珊瑚混凝土柱进行了对比试验。在低周反复荷载作用下,试件的破坏形态以弯曲破坏为主;提高配筋、箍筋间距和轴压比可以增强BFRP筋柱的初始刚度,但过大的箍筋间距和轴压比可能会对刚度退化产生不利影响;采用传统评价延性的方法评价BFRP筋的抗震性能存在一定局限性,综合指标能更全面地反映BFRP筋柱的承载力和变形性能;钢筋柱的刚度和综合指标均优于BFRP筋柱。The experiment was carried out to test how BFRP reinforcement(Basalt Fiber Reinforcement)reinforced coral concrete columns under seismic action.Six BFRP-reinforced full coral concrete columns were designed,and the breaking pattern,stiffness degradation and ductility of the specimens;three factors,namely,reinforcement rate,axial compression ratio and volumetric hoop ratio were analyzed to investigate the effects.Comparative tests were also conducted with ordinary steel reinforced coral concrete columns.The results showed that the damage pattern of the specimens was dominated by bending damage under low circumferential repeated loads.Increasing the reinforcement,hoop spacing and axial compression ratio can enhance the initial stiffness of BFRP-reinforced columns,but too large hoop spacing and axial compression ratio may adversely affect the stiffness degradation.There are some limitations in evaluating the seismic performance of BFRP bars using the traditional method of evaluating the ductility,and that the integrated indexes can more comprehensively reflect the load carrying capacity and deformation performance of BFRP bar columns.The stiffness and comprehensive indexes of steel-reinforced columns are better than those of BFRP-reinforced columns.

关 键 词：BFRP筋 珊瑚混凝土柱 地震作用 刚度 延性 

分 类 号：TU37[建筑科学—结构工程] TU352.11