Study of temperature effect on macro-synthetic fiber reinforced concretes by means of Barcelona tests: An approach focused on tunnels assessment

Autor(es)

Strauss Rambo, Dimas Alan ^[1] ; Blanco, Ana ^[2] ; de Figueiredo, Antonio Domingues ^[1] ; Fernandes dos Santos, Edson Rodrigo ^[3] ; Toledo Filho, Romildo Dias ^[3] ; Martins Gomes, Otavio da Fonseca ^{[4, 5]}

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Politecn, Dept Civil Construct Engn, Rua Prof Almeida Prado 532, BR-05508901 Sao Paulo - Brazil

^[2] UPC, Dept Civil & Environm Engn, Jordi Girona 1-3, Barcelona 08034 - Spain

^[3] Univ Fed Rio de Janeiro, COPPE, Civil Engn Dept, POB 68506, BR-21941972 Rio De Janeiro - Brazil

^[4] Ctr Mineral Technol CETEM, Av Pedro Calmon 900, Cidade Univ, BR-21941908 Rio De Janeiro - Brazil

^[5] Univ Fed Rio de Janeiro, Natl Museum, Postgrad Program Geosci, Av Quinta da Boa Vista S-N, BR-20940040 Rio De Janeiro - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CONSTRUCTION AND BUILDING MATERIALS; v. 158, p. 443-453, JAN 15 2018.
• Citações Web of Science: 4

Resumo

This paper presents an experimental investigation on the applicability of the Barcelona (BCN) test to evaluate the mechanical properties of a macro-synthetic fiber reinforced concrete (MSFRC) submitted to high temperature environments (up to 600 degrees C). BCN tests demonstrated that the MSFRC gradually loses tensile strength an energy consumption density with increasing temperature. Temperatures of 400 degrees C and 570 degrees C shown to be critical to the MSFRC mechanical performance. The residual mechanical behavior of the macro-synthetic fibers was not affected by the temperature up to 100 degrees C. For higher temperatures, the reinforcement showed that may lose part of its crystallinity compromising the MSFRC post-cracking performance. The constitutive model used to determine the stress-strain curves of the MSFRC was capable to reproduce the composite behavior after the event of a fire. (C) 2017 Elsevier Ltd. All rights reserved. (AU)

• 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