Seismic behavior of 1960's RC buildings exposed to marine environment

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Title: Seismic behavior of 1960's RC buildings exposed to marine environment
Authors: Bru, David | González Sánchez, Antonio | Baeza, F. Javier | Ivorra, Salvador
Research Group/s: Grupo de Ensayo, Simulación y Modelización de Estructuras (GRESMES) | Durabilidad de Materiales y Construcciones en Ingeniería y Arquitectura
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Civil
Keywords: Seismic loads | Plastic hinge | Vulnerability | RC building corrosion | Marine environment
Knowledge Area: Mecánica de Medios Continuos y Teoría de Estructuras
Issue Date: Aug-2018
Publisher: Elsevier
Citation: Engineering Failure Analysis. 2018, 90: 324-340. doi:10.1016/j.engfailanal.2018.02.011
Abstract: Steel rebars corrosion is one of the most important problems of reinforced concrete (RC) structures. The mechanical performance loss of RC elements because of steel corrosion can be aggravated under horizontal loads (e.g. wind pressure or seismic actions). This paper presents a methodology for the study of the seismic behavior of a residential typology of the Mediterranean coast, which was widely spread during the 1960's. These RC frame structures are usually 10 to 15 stories high, located very close to the coast and are exempt buildings, which made them specially exposed to chloride corrosion. Besides, there are some design conditions that should be taken into account: (i) these structures were designed only under gravity loads, especially seismic actions were not considered. (ii) The raw materials had lower quality than those considered in current design codes, e.g. structural concrete strength was around 15 MPa, and made with natural beach sand as fine aggregates (hence including chlorides into the concrete mass). Therefore, two important aspects converge in these buildings, fifty years of marine exposure (i.e. degradation by corrosion) and the omission of the seismic loads in the original design, making them especially vulnerable to earthquakes (in an area with a moderate-high seismicity). Hence, a methodology for the seismic analysis of the corroded structure is proposed, in order to determine the structural safety factor of this type of structures, and evaluate the effectiveness of a retrofitting if necessary.
ISSN: 1350-6307 (Print) | 1873-1961 (Online)
DOI: 10.1016/j.engfailanal.2018.02.011
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2018 Elsevier Ltd.
Peer Review: si
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Appears in Collections:INV - GRESMES - Artículos de Revistas
INV - DMCIA - Artículos de Revistas

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