Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (6): 907-912.DOI: 10.12068/j.issn.1005-3026.2018.06.029

• Resources & Civil Engineering • Previous Articles    

Experimental Research on Overloaded Damaged Reinforced Concrete Beams Strengthened with Near Surface Mounted CFRP Strips

YANG Jia1,2, WANG Lian-guang1   

  1. 1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China; 2. College of Architectural and Civil Engineering, Shenyang University, Shenyang 110044, China.
  • Received:2017-02-27 Revised:2017-02-27 Online:2018-06-15 Published:2018-06-22
  • Contact: WANG Lian-guang
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Abstract: In order to investigate the performance of damaged reinforced concrete beams strengthened with near surface mounted (NSM) carbon fiber reinforced polymer (CFRP) strips under overloading, the bending test of five reinforced concrete beams was carried out. The overloading state was simulated, and the failure mode, capacity and stiffness were studied. The influences of the overload cycle number and overload amplitude on the performance of reinforced concrete beams were also evaluated. The results show that embedding CFRP strips can enhance the capacity of overloaded damaged reinforced concrete beams to about 16% to 27%. The cycle number and overload amplitude affect the yield and ultimate load and stiffness in different ways. The yield and ultimate load decrease with the increase of cycle number and overload amplitude. The stiffness decreases with the increase of cycle number. The formula of ultimate bearing capacity is established, and the calculated results agree well with the experimental results.

Key words: CFRP strips, strengthening, reinforced concrete beams, overloading, bending bearing capacity

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