FRP-混凝土的颗粒增强界面及其剪切性能研究  

Study on the shear properties of FRP-concrete interface layer with reinforced particles

作　　者：伍敏 黄莉[1,2] 张小玉[1,2] 陈建中[1,2] 吕泳[1,2] WU Min;HUANG Li;ZHANG Xiaoyu;CHEN Jianzhong;Lü Yong(School of Science,Wuhan University of Technology,Wuhan 430070,China;Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学理学院,湖北武汉430070 [2]武汉理工大学新材料力学理论与应用湖北省重点实验室,湖北武汉430070

出　　处：《混凝土》2022年第1期57-60,共4页Concrete

基　　金：国家863项目“多基结构材料复合技术及在高压管制造中的应用”(2013AA031306)。

摘　　要：内衬玻璃钢的混凝土管道在输水、输气、输油工程中广泛应用,为改进管道成型工艺中玻璃钢层与混凝土之间容易出现大面积脱黏的问题,在玻璃钢层与混凝土之间引入树脂基颗粒增强的界面适配层。在试验研究的基础上建立有限元模型,分析了玻璃钢/混凝土界面的单剪试验,得到不同颗粒的质量平铺密度下界面的名义剪切强度,并与试验值对比,以预测颗粒的质量平铺密度与界面名义剪切强度之间的关系,为工程施工提供依据。结果表明在玻璃钢/混凝土界面加入不同粒径的增强颗粒能提高界面承载能力;相同质量平铺密度下,含中等粒径增强颗粒的适配层承载力比含大粒径增强颗粒的适配层承载力更大,在实际工程可优先选用中等粒径增强颗粒用于适配层的制作;且3.82、4.68 kg/m^(2)分别是含中等粒径、大粒径增强颗粒适配层的质量平铺密度的临界值。Concrete pipes with FRP are widely used in water transportation,gas transmission and oil transportation projects.In order to improve the problem of large-area debonding between FRP layer and concrete in the pipe,the interface adaptation layer of reinforced by particles was introduced between GFRP and concrete.Based on the experimental research,a finite element model was established to analyze the shear test of the FRP/concrete interface.The nominal shear strength of the interface at different mass densities was obtained and compared with the experimental values to predict the relationship between the nominal shear strength of the interface and the mass density of particles,which provides a basis for engineering construction.The results showed that adding reinforced particles with different particle sizes at the FRP/concrete interface can improve the bearing capacity of the interface.At the same mass density,the bearing capacity of the adaptation layer containing medium-size reinforced particles is greater than that of the adaptation layer containing large-size reinforced particles.In the actual project,medium-sized particles can be preferentially selected for the production of the adaptation layer.3.82 kg/m^(2)and4.68 kg/m;are the critical values of the mass density of the adaptation layers with medium and large particle sizes,respectively.

关 键 词：玻璃钢 混凝土 界面层 有限元 颗粒增强 

分 类 号：TU528.01[建筑科学—建筑技术科学]