Evaluation of post-cracking behavior of fiber reinforced concrete using indirect tension test

Autor(es)

Cruz Borges, Leonardo Augusto ^[1] ; Monte, Renata ^[1] ; Strauss Rambo, Dimas Alan ^[1] ; de Figueiredo, Antonio Domingues ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Polytech Sch, Dept Construct Engn, Ave Prof Almeida Prado Trav 2 83, BR-05508901 Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CONSTRUCTION AND BUILDING MATERIALS; v. 204, p. 510-519, APR 20 2019.
• Citações Web of Science: 2

Resumo

This paper presents an experimental investigation on the applicability of the novel double-edge wedge splitting (DEWS) testing technique to evaluate the mechanical properties of fiber reinforced concretes (FRCs) with low fiber content. This study aims to validate the DEWS test for the structural evaluation of FRCs with softening behavior, which is also considered by the design codes for structural applications. In this case, the occurrence of post-peak instability is critical. This instability could compromise the residual strength evaluation, especially for the serviceability limit state (SLS). The experimental studies focused on three main aspects affecting the DEWS test response: effect of test displacement rate, effect of fiber content, and orthotropy of FRCs. Two different groups of FRCs (reinforced with steel and macrosynthetic fibers) were mechanically evaluated, both at the SLS and ultimate limit state. The variation of the test displacement rate had no significant impact on the FRC post-cracking pattern. The DEWS test could detect behavioral variations induced by altering the fiber content and fiber orientation on both composites. This variation was more evident for higher crack opening levels because the post-peak instability may compromise the DEWS results in the SLS. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 12/24281-6 - Avaliação da tenacidade de concretos reforçados com fibras através do ensaio de compressão de corpos de prova com entalhe
• Beneficiário: Leonardo Augusto Cruz Borges
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 15/25457-9 - Efeito da temperatura na resistência in-situ e residual de segmentos de túneis reforçados com fibras por meio do ensaio Barcelona simplificado
• Beneficiário: Dimas Alan Strauss Rambo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado