FRP布材增强钢筋混凝土桩水平承载性能研究  

Research on horizontal bearing performance of reinforced concrete piles reinforced by FRP cloth

作　　者：张建伟[1,2] 樊亚龙 娄蒙凡 边汉亮 丁乐 ZHANG Jianwei;FAN Yalong;LOU Mengfan;BIAN Hanliang;DING Le(School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,China;Henan Provincial Research Center of Engineering on Intelligent Construction of Rail Transit,Kaifeng 475004,China)

机构地区：[1]河南大学土木建筑学院,开封475004 [2]河南省轨道交通智能建造工程技术中心,开封475004

出　　处：《建筑结构》2024年第4期80-85,148,共7页Building Structure

基　　金：国家自然科学基金青年基金项目(51508163);河南省高等学校青年骨干教师培养计划(2019GGJS041);河南省研究生教育改革与质量提升工程项目(YJS2021JD13)。

摘　　要：纤维增强复合材料(FRP)由于其轻质高强的优点被广泛应用于抗震加固、结构补强等实际工程中,但有关FRP增强混凝土桩水平承载性能的研究较少。为了研究不同FRP布材加固混凝土桩承载特性问题,通过室内模型试验对FRP布桩(普通钢筋混凝土桩身包裹FRP布材)的水平承载规律进行研究,探究了不同包裹层数、不同FRP布材类型、不同布材混合包裹对钢筋混凝土桩承载性能的影响。同时利用ABAQUS软件建立FRP布桩三维有限元模型,对每种工况进行数值模拟。结果表明,FRP布桩的水平承载性能随着包裹层数的增加而提升,提升效果与包裹层数之间并不存在正比例关系;不同布材类型的FRP布桩中,CFRP布对FRP布桩的水平承载性能提升效果最优;混合包裹(CFRP+GFRP)的提升效果要略优于包裹2层GFRP布。Fiber reinforced polymer material(FRP)is widely used in practical projects such as seismic reinforcement and structural reinforcement due to its light weight and high strength.However,there are few studies on FRP to enhance the horizontal bearing performance of concrete piles.In order to study the bearing performance of reinforced concrete piles with different FRP cloth materials,the horizontal load-bearing law of FRP cloth piles(wrapped with FRP cloth materials in the ordinary reinforced concrete pile body)was studied by indoor model test methods.The influence of different number of wrapping layers,different types of FRP cloth materials,and different mixed wrapping materials on the bearing performance of reinforced concrete piles was explored.Using ABAQUS software,three-dimensional finite element model of FRP piles was established,and numerical simulation for each working condition were performed.The results show that the horizontal load-bearing performance of FRP piles increases with the increase of the number of wrapping layers,and there is no direct proportional relationship between the lifting effect and the number of wrapping layers;among FRP piles of different cloth types,the lifting effect of CFRP cloth on the horizontal bearing performance is the best;the lifting effect of wrapping CFRP cloth and GFRP cloth together is slightly better than wrapping 2 layers of GFRP cloth.

关 键 词：纤维增强复合材料 约束混凝土 FRP布桩 水平承载特性 数值分析 

分 类 号：TU473.1[建筑科学—结构工程]