Seismic assessment methodology for corroded reinforced concrete buildings

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Show simple item record Nataraj, Sunil en Scott, A en Ingham, Jason en Hogan, Lucas en
dc.coverage.spatial Taipei, Taiwan en 2019-10-29T20:17:11Z en 2019-09-17 en
dc.identifier.uri en
dc.description.abstract The durability of older reinforced concrete (RC) structures is significantly affected by corrosion of the reinforcement and is a critical issue for New Zealand RC buildings because of the close proximity of most urban centres to a marine environment. Currently, the seismic assessment of such buildings is a challenging task because there is limited and dispersed guidance for how to assess the residual seismic capacity of corroded RC members and determine the likely overall seismic behaviour of an RC building exhibiting corrosion. An assessment procedure was developed to account for the effect of corrosion on the residual strength and deformation capacity of corroded RC members. Analytical models to predict material and member properties were considered and modified to account for pitting corrosion. These predictions were verified against a large database of experimental results from the available literature. A case study of a severely corroded RC building in New Zealand constructed in the year 1928 was assessed using the proposed methodology to investigate the reduction in seismic capacity due to corrosion. While no change in failure mechanism was found, the overall displacement capacity of the building was reduced by 25% compared to the assessed uncorroded condition. Finally, to estimate the changes in capacity and failure mode with respect to exposure time in a corrosive environment, the long-term corrosion effect was studied for the case study building assuming no remediation of corroded reinforcement. As a result, the displacement capacity was significantly reduced forming storey collapse at less than 1% drift, if no remediation was made after 30 years of continued corrosion deterioration. en
dc.relation.ispartof International Conference in Commemoration of 20th Anniversary of the 1999 Chi-Chi Earthquake en
dc.rights Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. en
dc.rights.uri en
dc.subject corrosion en
dc.subject reinforced concrete en
dc.subject seismic assessment en
dc.subject residual capacity en
dc.subject buildings en
dc.title Seismic assessment methodology for corroded reinforced concrete buildings en
dc.type Conference Item en
dc.rights.holder Copyright: The author en
pubs.finish-date 2019-09-19 en
pubs.publication-status Published en
pubs.start-date 2019-09-15 en
dc.rights.accessrights en
pubs.subtype Conference Paper en
pubs.elements-id 781023 en Engineering en Civil and Environmental Eng en
pubs.record-created-at-source-date 2019-09-20 en

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