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  邓宗才,顾佳培.FRP管约束活性粉末混凝土方柱抗震性能研究[J].震灾防御技术,2019,14(4):769-780, DOI:10.11899/zzfy20190408.

FRP管约束活性粉末混凝土方柱抗震性能研究
摘要:    为了探究纤维增强聚合物(fiber reinforced polymers,FRP)管约束活性粉末混凝土(reactive powder concrete,RPC)方柱在低周反复荷载作用下的抗震性能,利用有限元软件ABAQUS对FRP管约束RPC方柱进行了数值模拟,并对不同轴压比、配箍率和FRP管厚度条件下约束柱的抗震性能进行了分析。结果表明:采用有限元模型对FRP管约束RPC方柱进行模拟是可靠的,有限元模拟结果和试验结果吻合较好;轴压比为0.2~0.6时,峰值荷载随轴压比的增大而增大,轴压比为0.7时的峰值荷载较0.6时反而下降;配箍率、FRP管厚度的增加可以改善约束柱的抗震性能,延缓强度和刚度的退化;FRP管厚度为0.501mm时的约束效果最好。
作者单位
邓宗才 北京工业大学城市与工程防灾减灾省部共建教育部重点实验室, 北京 100124 
顾佳培 北京工业大学城市与工程防灾减灾省部共建教育部重点实验室, 北京 100124 
关  键  词:低周反复荷载  纤维增强聚合物  活性粉末混凝土  方柱  数值模拟
DOI:10.11899/zzfy20190408
基金项目:北京市教委科技重点项目(KZ201810005008);国家自然科学基金项目(51578021)
收稿日期:2019-04-25
作者简介:邓宗才,男,生于1961年。工学博士,教授,博士生导师。主要从事纤维混凝土结构方面的研究。E-mail:Dengzc@bjut.edu.cn
通讯作者:
Research on Seismic Performance of Reactive Powder Concrete Square Columns Confined With FRP Tubes
Abstract:      To explore the seismic performance of reactive powder concrete square columns confined with fiber reinforced polymers tubes under low cyclic loading, the study analyzed RPC square columns confined with FRP tubes by finite element software ABAQUS and investigated the influences of axial compression ratio, stirrup ratio and FRP tubes thickness. The results are as follows:the finite element method is reliable, and the finite element simulation results are consistent with the experimental results; when the axial compression ratio is between 0.2 and 0.6, the peak loads increase with the axial compression ratio; when the axial compression ratio is 0.7, the peak load shows a downward trend; with the increase of stirrup ratio and FRP tubes thickness, the seismic performance of confined columns is improved, and the stiffness and capacity decrease slowly; the confinement works best when the thickness of FRP tubes is 0.501mm (number of layers is 3).
Keywords:  Low cyclic loading  Fiber reinforced polymers  Reactive powder concrete  Square column  Numerical simulation
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