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Numerical investigation on failure characteristics of near surface mounted RC beams
Strengthening has certainly become a good choice in terms of structural efficacy and economical solution. Among the various strengthening methods available for reinforced concrete (RC) beams, the near surface mounted (NSM) method provides suitable approach for the enhancement of the flexural performance. Although much experimental studies have been conducted on RC beams strengthened with NSM techniques, numerical researches are still required to understand the effect of various parameters on its flexural behavior. In this paper, an attempt is made to understand the effectiveness of NSM bars as a means of restoring or upgrading the flexural capacity of RC beams by adopting 3D finite element approach after validating its predictive performance experimentally. Influence of NSM configuration (carbon fiber-reinforced polymer (CFRP) bar/strip) and NSM bonded length on the efficiency of the strengthening system is assessed through ultimate load at failure, strain characteristics as well as bond stress distribution along the NSM reinforcement. The failure criteria in NSM strengthened beams are predicted by the strain profile across the section. The bond stress distribution along the length of the CFRP bar suggests the minimum bonded length of NSM reinforcement required to achieve maximum flexural efficiency of the beam.
Numerical investigation on failure characteristics of near surface mounted RC beams
Strengthening has certainly become a good choice in terms of structural efficacy and economical solution. Among the various strengthening methods available for reinforced concrete (RC) beams, the near surface mounted (NSM) method provides suitable approach for the enhancement of the flexural performance. Although much experimental studies have been conducted on RC beams strengthened with NSM techniques, numerical researches are still required to understand the effect of various parameters on its flexural behavior. In this paper, an attempt is made to understand the effectiveness of NSM bars as a means of restoring or upgrading the flexural capacity of RC beams by adopting 3D finite element approach after validating its predictive performance experimentally. Influence of NSM configuration (carbon fiber-reinforced polymer (CFRP) bar/strip) and NSM bonded length on the efficiency of the strengthening system is assessed through ultimate load at failure, strain characteristics as well as bond stress distribution along the NSM reinforcement. The failure criteria in NSM strengthened beams are predicted by the strain profile across the section. The bond stress distribution along the length of the CFRP bar suggests the minimum bonded length of NSM reinforcement required to achieve maximum flexural efficiency of the beam.
Numerical investigation on failure characteristics of near surface mounted RC beams
Asian J Civ Eng
Prabhakaran, Preetha (author) / Joseph, Glory (author)
Asian Journal of Civil Engineering ; 23 ; 1291-1303
2022-12-01
13 pages
Article (Journal)
Electronic Resource
English
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