复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (8): 66-72.DOI: 10.19936/j.cnki.2096-8000.20210828.010

• 应用研究 • 上一篇    下一篇

不同纤维增强复合材料加固混凝土短柱轴心受压承载力试验研究

郭晓云1,2, 陈杰1, 唐永明1   

  1. 1.防灾科技学院 土木工程学院,三河065201;
    2.中国地震局 建筑物破坏机理与防御重点实验室,三河065201
  • 收稿日期:2021-03-12 出版日期:2021-08-28 发布日期:2021-09-09
  • 作者简介:郭晓云(1982-),女,博士,副教授,硕士研究生导师,主要研究方向为复合材料在结构工程抗震中的应用,guoxyun2005@163.com。
  • 基金资助:
    地震科技星火计划项目(XH19069Y);河北省高等学校科学研究项目(ZD2021416)

Experimental study on axial compression bearing capacity of concrete short column strengthened with different fiber reinforced composites

GUO Xiao-yun1,2, CHEN Jie1, TANG Yong-ming1   

  1. 1. School of Civil Engineering, Institute of Disaster Prevention, Sanhe 065201, China;
    2. Key Laboratory of Building Collapse Mechanism and Disaster Prevention, China Earthquake Administration, Sanhe 065201, China
  • Received:2021-03-12 Online:2021-08-28 Published:2021-09-09

摘要: 对70个混凝土短柱试件进行轴心受压试验,其中未加固素混凝土方柱和圆柱各5个,纤维增强复合材料外包约束素混凝土方柱、圆柱各30个。根据试验结果对比分析了CFRP、GFRP和BFRP对不同截面形状素混凝土短柱采用不同层数进行外包加固后对混凝土短柱轴压承载力的提高效果,并采用我国《混凝土结构加固设计规范》(GB 50367—2013)和美国《FRP加固混凝土设计指导规范》(ACI 440.2R-17)中FRP外包加固混凝土柱承载力公式计算了加固试件的受压承载力设计值,通过对比试验结果,分析了中美规范中FRP加固柱承载力设计值的安全储备,并提出FRP加固混凝土规范的修订建议。

关键词: 纤维增强复合材料, 混凝土柱, FRP加固, 受压承载力, 试验研究

Abstract: Axial compression tests were conducted with 70 concrete short columns, including 5 concrete columns with square cross sections, 5 concrete columns with circular cross sections, 30 confining square concrete columns with fiber reinforced composite material and 30 confining circle concrete columns with fiber reinforced composite material. The effectiveness of strengthening between different shaped reinforcing columns with different FRP were analyzed and compared. Design values of compression bearing capacity were calculated according to Chinese "Code for design of strengthening concrete structure" (GB 50367—2013) and American "Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures" (ACI 440.2R-17). By comparing the test results and calculated results, the safety reserve of bearing capacity design value of FRP strengthened column in Chinese and American codes was analyzed. Suggestions for further revision on code for design of FRP strengthening concrete are put forward.

Key words: fiber reinforced composites, concrete column, FRP strengthening, axial compression bearing capacity, experimental study

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