东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2011, Vol. 32 ›› Issue (10): 1495-1498.DOI: -

• 论著 • 上一篇    下一篇

FRP板长度对混凝土加固梁破坏过程的影响

张娟霞;朱万成;唐春安;郭献章;   

  1. 东北大学秦皇岛分校材料科学与工程系;东北大学资源与土木工程学院;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50874024,51074042);;

Influence of FRP sheet length on failure process of reinforced concrete beam

Zhang, Juan-Xia (1); Zhu, Wan-Cheng (2); Tang, Chun-An (2); Guo, Xian-Zhang (1)   

  1. (1) Department of Materials Science and Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China; (2) School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Zhang, J.-X.
  • About author:-
  • Supported by:
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摘要： 用数值试验方法分析了破坏过程中FRP板中的应力传递过程,即从FRP承担拉应力起,到应力增大直至最后失去承载力.通过对粘贴不同FRP板长度对于加固后结构的力学性能的影响的分析,可以看出FRP板的长度直接影响结构破坏时的极限应变.在适当的范围内,FRP板的加固长度越大,梁的极限应变和梁的韧性越大,FRP板中承担的拉应力和外荷载位移越大,混凝土梁破坏时底部产生的裂缝越多;FRP板越短,越容易产生剥离破坏.

关键词: 数值试验, 混凝土裂纹, 变形与破坏, FRP板长度, 破坏过程

Abstract: The stress transmission process in the FRP sheet was analyzed numerically during the failure process of the FRP reinforced concrete specimen, characterized as the stress initiation, propagation and final decay of the loading capacities. Based on the examination of the mechanical properties of reinforced concrete structures under different FRP sheet lengths, it was found that the ultimate strain and the toughness, as well as the loading capacity and tensile stress sustained by the FRP sheet, increase with the RFP sheet length, and more cracks are also distributed on the bottom of the beam. For the shorter FRP sheet, the debonding failure is prone to occurring.

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