Time-Dependent Reliability of Reinforced Concrete Considering Chloride Penetration via Boundary Element Method

Autor(es)

Pellizzer, Giovanni Pais ^[1] ; Kroetz, Henrique Machado ^[2] ; Leonel, Edson Denner ^[3] ; Beck, Andre Teofilo ^[3]

Afiliação do(s) autor(es)

^[1] Fed Mato Grosso do Sul, Fac Engn Arquitetura & Urbanismo & Geog, Av Costa E Silva, Cidade Univ, BR-79070900 Campo Grande, MS - Brazil

^[2] Univ Fed Parana, Ctr Estudos Mar, Campus Pontal do Parana, Av Beira Mar S-N, POB 61, BR-83255976 Pontal Do Parana, PR - Brazil

^[3] Univ Sao Paulo, Dept Engn Estruturas, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES; v. 17, n. 8, SI 2020.
• Citações Web of Science: 1

Resumo

Strength degradation of structural materials is an inevitable process, due to deleterious actions such as corrosion and fatigue. These phenomena are also typically random, with degradation rates and starting time of degradation process largely uncertain. In reinforced concrete structures, corrosion of reinforcing bars caused by chloride ions is one of the main pathological manifestations. Past studies on the time-variant reliability of reinforced concrete structures subject to corrosion have relied on simplified analytical models for estimating the depassivation time. This study contributes with an accurate modelling of chloride diffusion through concrete using the boundary element method, which is employed for the first time within a time-variant reliability framework. Cumulative failure probabilities are evaluated in time by considering random depassivation times, random corrosion evolution, and random load processes. The time-variant reliability problem is solved using Monte Carlo simulation. An application example is presented, demonstrating the capabilities of the proposed framework. (AU)

• Processo FAPESP: 17/01243-5 - Otimização estrutural baseada em confiabilidade
• Beneficiário: André Teófilo Beck
• Modalidade de apoio: Auxílio à Pesquisa - Regular