摘要
采用玻璃纤维增强复合材料GFRP(Glass Fibre Reinforced Polymer)代替模板将钢筋混凝土浇筑于其中组成构件,既能节省施工时间,又能提高柱的受力性能以及抗腐蚀能力.为探究长细比以及螺旋箍筋间距对GFRP约束螺旋箍筋混凝土柱轴压性能的影响,采用有限元软件ABAQUS建立了四组长细比及螺旋箍筋间距不同的GFRP约束螺旋箍筋混凝土柱,并对其轴压性能进行了分析.研究发现:长细比越大的构件延性越好;当螺旋箍筋间距小于100 mm时,螺旋箍筋对GFRP约束螺旋箍筋混凝土柱的承载能力提升较大;当螺旋箍筋间距大于100 mm时,螺旋箍筋对GFRP约束螺旋箍筋混凝土柱的承载能力提升较小,此时的螺旋箍筋主要起构造作用;长细比较大且螺旋箍筋间距较大的构件可能在塑性阶段突然发生破坏.
The reinforced concrete is poured into the component by GFRP(Glass Fibre Reinforced Polymer)instead of the formwork,which can not only save construction time,but also improve the mechanical performance and corrosion resistance of the column.In order to investigate the influence of slenderness ratio and spacing of spiral stirrups on the axial compression performance of GFRP confined spiral stirrup concrete columns,four groups of GFRP restrained spiral stirrup concrete columns with different slenderness ratio and spiral stirrup spacing were established by using ABAQUS,and the axial compression performance of each group was analyzed.The results show that the ductility of the component with the larger slenderness ratio is better.When the spacing of spiral stirrups is less than 100 mm,the bearing capacity of GFRP confined spiral stirrup concrete column is greatly increased.When the spacing of spiral stirrups is more than 100 mm,the bearing capacity of GFRP confined spiral stirrup concrete column is scarcely increased,and the spiral stirrups at this time play a major role in structure.The members with large slenderness ratio and large spacing of spiral stirrups may suddenly break down in plastic stage.
作者
詹界东
张永新
刘敏
ZHAN Jiedong;ZHANG Yongxin;LIU Min(School of Civil Engineering and Architecture,Northeast Petroleum University,Daqing 163318,Heilongjiang China)
出处
《河南科学》
2021年第7期1106-1112,共7页
Henan Science
基金
黑龙江省自然科学基金项目(LH2020E018)。
