Analysis of lifetime losses of low-rise reinforced concrete buildings attacked by corrosion and earthquakes using a novel method

Abstract

In the estimation of the losses caused by an earthquake for a reinforced concrete (RC) building, the effect of corrosion of the reinforcing steel incurred by environmental conditions, e.g. carbonation and chloride ions, is seldom mentioned because of the corrosion with uncertainty and time dependence. However, because the structural capacity of a corroded RC building declines over time, one must apply an appropriate method that estimates the structural capacity of an RC building in a corrosive environment. Therefore, this work integrated degradation factors into the structural properties of a corroded RC building. Additionally, by considering life-cycle earthquake events, lifetime losses resulting from earthquakes and corrosion can be derived. This work can help both owners and investors to identify lifetime losses of RC buildings due to seismic structural damage, including the corrosion effect, within a specified service life. Although the case study only addresses a selection of the most appropriate concrete cover depth for an RC building corroded by chloride ions, the proposed procedure can be utilised when making decisions about whether to prevent building deterioration based on economic considerations.

Probabilistic assessment of corroded concrete structures – systematic literature review

“…In the evaluation of corroded concrete structures, data from inspection and monitoring can be obtained to provide a more reliable analysis of the condition of the structure. In this review, 23 of 94 articles (24,5%) present real data from structures [6], [8], [10], [19], [22], [34], [38], [43], [45]- [47], [55], [74], [78], [80], [92], [94]- [97], [106], [109], [111].…”

Analysis of time-dependent reliability of degenerated reinforced concrete structure

“…They integrated the theory of structural safety degree and the concept of mathematical statistics and proposed a reliability analysis calculation model. Then earliest reliability calculation model was extensively recognized and studied by other scholars [9]. In 1969, Cornell, an American expert, proposed the concept of reliability index, integrated it with structural failure rate and put forward the conversion formula with regard to reliability index and structural failure rate [10].…”

Lifetime seismic performance assessment for chloride-corroded reinforced concrete buildings

“…Analytical results showed that the effect of corrosion on seismic performance was highly significant, and it should be considered carefully in performance analysis. Chiu and Chi (2013) proposed mechanical models for corroded beam or column members and adopted a superposition method, which is not suggested by ATC-40 (1996), to simulate the structure performance of an RC building. Although the proposed method in that study is effective to evaluate lifetime losses of corroded RC buildings under seismic events, the mechanical models for corroded members should be verified by experimental data.…”