PREDICTION OF THE IC DEBONDING FAILURE OF FRP-STRENGTHENED RC BEAMS BASED ON THE COHESIVE ZONE MODEL

JINGCHUN ZHANG; RONG GUO; SHENGYUE LI; SHAOWEI ZHAO

doi:10.1590/1679-78256208

PREDICTION OF THE IC DEBONDING FAILURE OF FRP-STRENGTHENED RC BEAMS BASED ON THE COHESIVE ZONE MODEL

Authors

JINGCHUN ZHANG COLLEGE OF CIVIL AND TRANSPORTATION ENGINEERING, HEBEI UNIVERSITY OF TECHNOLOGY, TIANJIN, CHINA HTTPS://ORCID.ORG/0000-0002-9193-0355
RONG GUO COLLEGE OF CIVIL AND TRANSPORTATION ENGINEERING, HEBEI UNIVERSITY OF TECHNOLOGY, TIANJIN, CHINA HTTPS://ORCID.ORG/0000-0002-6091-4707
SHENGYUE LI COLLEGE OF CIVIL AND TRANSPORTATION ENGINEERING, HEBEI UNIVERSITY OF TECHNOLOGY, TIANJIN, CHINA HTTPS://ORCID.ORG/0000-0002-2413-5685
SHAOWEI ZHAO COLLEGE OF CIVIL AND TRANSPORTATION ENGINEERING, HEBEI UNIVERSITY OF TECHNOLOGY, TIANJIN, CHINA HTTPS://ORCID.ORG/0000-0003-4287-1309

DOI:

https://doi.org/10.1590/1679-78256208

Abstract

INTERMEDIATE CRACK (IC) DEBONDING FAILURE IS ONE OF THE COMMON BENDING FAILURE FORMS OF FIBER-REINFORCED POLYMER (FRP)-STRENGTHENED REINFORCED CONCRETE (RC) BEAMS. IN THIS PAPER, A NEW PREDICTION MODEL FOR IC DEBONDING IN FRP-STRENGTHENED RC BEAMS IS PROPOSED BASED ON FRACTURE MECHANICS AND COHESIVE ZONE MODEL (CZM), WHICH TAKES INTO ACCOUNT THE COUPLING EFFECT OF MANY PARAMETERS AND HAS THE ADVANTAGES OF HIGH PRECISION AND SIMPLE EXPRESSION. THE NONLINEAR BEHAVIOR OF FRP-STRENGTHENED RC BEAMS AND THE INFLUENCE OF FLEXURAL CRACKS ARE REASONABLY CONSIDERED IN THIS MODEL, WHEREAS ALL EXISTING ANALYTICAL MODELS BASED ON THE CZM NEGLECT THIS EFFECTS. TO VERIFY THE ACCURACY OF THIS MODEL, WE ESTABLISHED A DATABASE CONTAINING 248 TEST DATA FROM THE EXISTING LITERATURE. BY COMPARING THE DIFFERENCES BETWEEN THE PREDICTED AND EXPERIMENTAL RESULTS, WE ANALYZED THE CAUSES OF THE ERROR AND ESTABLISHED A SEMIEMPIRICAL MODEL. TO TEST THE RELIABILITY OF THE MODEL, IT IS EVALUATED USING THE DATABASE CONSTRUCTED IN THIS PAPER TOGETHER WITH FOUR REPRESENTATIVE STRENGTH MODELS. THE RESULTS SHOW THAT THE SEMIEMPIRICAL MODEL HAS A HIGH ACCURACY.

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Published

2020-08-03

Issue

Vol. 17 No. 6 (2020)

Section

Articles

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