配筋率对GFRP板-混凝土组合梁受力性能的影响  

Effect of Reinforcement Ratio on Mechanical Properties of GFRP Plate-Concrete Composite Beams

作　　者：李文[1] 武先梅 徐珍[1] LI Wen;WU Xianmei;XU Zhen(School of Civil Engineering and Architecture,Northeast Petroleum University,Daqing 163318,Heilongjiang China)

机构地区：[1]东北石油大学土木建筑工程学院

出　　处：《河南科学》2019年第11期1766-1771,共6页Henan Science

基　　金：国家自然基金科学项目（51308028）;黑龙江省教育厅科学技术项目（12543023）

摘　　要：为研究配筋率对FRP板-混凝土组合梁受力性能的影响规律,利用ABAQUS有限元软件建立4种不同配筋率情况下的碳纤维增强复合材料(GFRP)加固混凝土梁模型,通过组合梁的荷载-跨中挠度曲线和承载力两个方面验证了模型建立方法的合理性.研究结果表明,随着配筋率的增大,组合梁的极限承载力也增大,相同荷载下,配筋率大的梁变形较小,说明增大配筋率可以有效提高组合梁的极限承载力,同时减小梁的变形.但是在相同条件下增大混凝土强度等级,能使组合梁承受的极限承载力和变形更大一些.因此,说明组合梁的受力性能不仅会受配筋率的影响,还会受到混凝土强度的影响.In order to study the influence of reinforcement ratio on the mechanical properties of FRP plate-concrete composite beams,ABAQUS finite element software is used to establish a carbon fiber reinforced composite(GFRP)reinforced concrete beam model under four different reinforcement ratios.The rationality of the model establish-ment method is verified by two aspects of the load-span deflection curve and bearing capacity of the composite beam.The results show that with the increase of the reinforcement ratio,the ultimate bearing capacity of the composite beam also increases.Under the same load,the beam with higher reinforcement ratio deforms less,indicating that increasing the reinforcement ratio can effectively improve the ultimate bearing capacity of the composite beam and reduce the deformation of the beam.But under the same conditions to increase the strength grade of the concrete,the ultimate bearing capacity and deformation of the composite beam can be greater.Therefore,it shows that the mechanical properties of the composite beam will not only be affected by the reinforcement ratio studied in this paper,but also by the strength of the concrete.

关 键 词：组合梁 配筋率 受力性能 GFRP ABAQUS 极限承载力 荷载-挠度曲线 混凝土强度 

分 类 号：TU398.9[建筑科学—结构工程]