摘要
为了研究不同包裹方式和不同纤维材料的FRP复合桩(普通钢筋混凝土桩身包裹FRP布)水平承载性能以及FRP布-桩身界面黏结性能对FRP复合桩水平承载性能的影响,利用有限元软件,建立考虑FRP布-桩身黏结性能的FRP复合桩内聚力模型,并与试验结果和传统数值模拟结果相对比。结果表明:FRP复合桩的水平承载性能随着包裹层数的增加而提高,不同布材中CFRP布对FRP复合桩的水平承载性能提高效果较BFRP布和GFRP布的更优;随着FRP布-桩身黏结强度增大,桩顶水平位移逐渐减小,相同截面处的弯矩也随之减小;与传统数值模拟结果相比,考虑FRP布-混凝土界面黏结性能的内聚力模型结果与试验结果更加吻合,且误差范围更小,验证了该有限元模型的正确性。研究结果可为FRP复合桩的水平承载力设计提供参考。
In order to study the horizontal bearing capacity of FRP composite piles(ordinary reinforced con-crete piles wrapped with FRP cloth)with different wrapping methods and different fiber materials,and the influence of FRP cloth-pile interface bonding performance on the horizontal bearing capacity of FRP com-posite pile,the finite element software was used to establish the cohesion model of FRP composite pile con-sidering the bond performance of FRP cloth-pile,and compared with the experimental results and traditional numerical simulation results.The test results showed that,the horizontal bearing capacity of FRP composite pile increased with the increase of the number of wrapping layers,and the improvement effect of CFRP cloth on the horizontal bearing capacity of FRP composite pile was better than that of BFRP cloth and GFRP cloth.With the increase of bond strength between FRP cloth and pile,the horizontal displacement of pile top decreased gradually,and the bending moment at the same section also decreased.Compared with the traditional numerical simulation results,the cohesive force model results considering the interfacial bonding properties of FRP cloth-concrete were more consistent with the experimental results,and the error range was smaller,which verified the correctness of the finite element model.The results of the study could provide reference for the design of horizontal bearing capacity of FRP composite piles.
作者
张建伟
张䶮
娄蒙凡
石磊
付进省
ZAHNG Jianwei;ZHANG Yan;LOU Mengfan;SHI Lei;FU Jinsheng(School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,Henan,China;Henan Provincial Research Center of Engi-neering on Intelligent Construction of Rail Transit,Kaifeng 475004,Henan,China;Henan Architectural Design and Research Institute Co.,Ltd.,Zhengzhou 450014,Henan,China)
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2023年第3期173-179,共7页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(51508163)
河南省科技攻关重点资助项目(192102310226)
河南省高等学校青年骨干教师培养计划项目(2019GGJS041)。
关键词
FRP复合桩
水平承载性能
黏结性能
有限元软件
内聚力模型
FRP composite pile
horizontal bearing capacity
bonding property
finite element software
cohe-sion model
