Banca de DEFESA: KÉZIA BRASILINO DE SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : KÉZIA BRASILINO DE SOUZA
DATE: 29/02/2024
TIME: 09:00
LOCAL: Pós-Graduação Engenharia Civil
TITLE:

Systematic Review of Post-Fire Reinforcement of Reinforced Concrete Beams Using Carbon Fiber Laminates

KEY WORDS:

post-fire rehabilitation, reinforced concrete beams, CFRP laminates, systematic review.

PAGES: 74
BIG AREA: Engenharias
AREA: Engenharia Civil
SUMMARY:

Fire in reinforced concrete (RC) structures reduces their mechanical properties. As a result, CA elements require post-fire rehabilitation in order to fully perform their initial functions established at the design stage. The main objective of this systematic review study is to identify the main mechanical performance responses of CA beams after they have been damaged by heating and then reinforced using carbon-fiber-reinforced polymer (CFRP) laminates. The PRISMA methodology (Transparent Reporting of Systematic Reviews and Meta-Analyses) was used to carry out the systematic review, with searches in the databases of the journal portals: Engineering Village, CAPES Portal, Science Direct, Scopus and Web of Science. Selection criteria were adopted to filter out experimental studies on reinforced concrete beams after heating and reinforced with CFRP laminates, published between 1990 and 2023 (up to September of this year). A total of 1,413 studies were found, of which only 28 were read in full, resulting in the selection of 11 articles for analysis. Therefore, it was observed that the use of CFRP laminate repair after fire damage to AC beams increases the mechanical performance of the parts. However, there is still a gap in knowledge on the subject, with only one paper studying the behavior of beams with post-fire reinforcement, considering the furnace in the transient temperature state. Among the papers, a large part is aimed at flexural reinforcement (82%), with only two studies on shear reinforcement (18%), and no paper taking into account the influence of the NSM CFRP flexural reinforcement rate, with a heating regime according to the ISO 834 fire curve. From the review of the system, it can be concluded that it was possible to recover the load-bearing capacity of the CA beams, after the fire and reinforced in bending with CFRP laminates, up to a temperature of 800 °C (115%), and for the shear reinforcement up to the damage of more than 1000 °C (125%), in relation to the intact reference beam. However, for both scenarios, stiffness was not restored. In view of the parameters shown, temperature damage, the EBR/NSM reinforcement technique and reinforcement rate are, in that order, the most influential on the performance results of the CA beams.

COMMITTEE MEMBERS:
Externa à Instituição - NAILDE DE AMORIM COELHO - UNIVASF
Presidente - 1764589 - PAULO MARCELO VIEIRA RIBEIRO
Externa à Instituição - YÊDA VIEIRA PÓVOAS - UPE