玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (9): 12-16.

• 基础研究 • 上一篇    下一篇

轴压PVC-CFRP管钢筋混凝土柱应力-应变关系模型

于峰1, 牛荻涛2   

  1. 1.安徽工业大学建筑工程学院,马鞍山243002;
    2.西安建筑科技大学土木工程学院,西安710055
  • 收稿日期:2016-03-14 出版日期:2016-09-28 发布日期:2016-09-28
  • 作者简介:于峰(1980-),男,工学博士,教授,主要从事FRP在土木工程中的应用、组合结构研究工作,yufeng2007@126.com。
  • 基金资助:
    国家自然科学基金项目(51008001,51578001,51608003);安徽省教育厅科学研究重大项目(KJ2015ZD10);安徽省高校优秀青年人才支持计划;马鞍山市科学技术项目(马科2013(79))

STRESS-STRAIN RELATIONSHIP MODEL OF PVC-CFRP CONFINED REINFORCED CONCRETE COLUMN SUBJECTED TO AXIAL COMPRESSION

YU Feng1, NIU Di-tao2   

  1. 1.School of Civil Engineering, Anhui University of Technology, Ma’anshan 243002, China;
    2.School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
  • Received:2016-03-14 Online:2016-09-28 Published:2016-09-28

摘要: 开展10根轴压PVC-CFRP管钢筋混凝土应力-应变关系试验研究,结果表明试件应力-应变关系曲线可分为两个阶段:第一阶段为抛物线,与相同配筋钢筋混凝土柱的应力-应变关系曲线相似;第二阶段为强化段,试件应力-应变关系基本呈线性关系,随着FRP条带环箍间距的增加,试件强化段斜率逐渐减少,轴向配筋可显著提高核心混凝土柱的承载力和变形,配筋率对试件强化段的斜率影响很小。通过对试验数据的回归分析,提出试件轴压承载力和极限压应变的计算方法,并建立相应的应力-应变关系模型。

关键词: 聚氯乙烯-纤维增强复合材料管, 混凝土柱, 承载力, 轴向应变, 应力-应变关系

Abstract: Experimental study of 10 PVC-FRP confined reinforced concrete column subjected to axial compression were carried out. The experimental results show that the stress-strain curves can be divided into two stages: the first section of the stress-strain relationship curves is parabola, which is similar to that of reinforced concrete column with the same reinforcement ratio; the second section of the stress-strain relationship curves take on the strengthening stage, and the stress, strain and the strengthening slope gradually reduce with the increment of the hoop spacing of FRP strips. Due to the axial reinforcement, the bearing capacity and deformation of core concrete are greatly improved. The reinforcement ratio almost have no effect on the strengthening slope. According to the regression of experimental results, the calculation formula of bearing capacity and ultimate compressive strain are put forward, and then the related stress-strain model is also established.

Key words: PVC-FRP tube, concrete column, bearing capacity, axial strain, stress-strain relationship

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