Fault-Tree-Based Integrated Approach of Assessing the Risk of Failure of Deteriorated Reinforced-Concrete Bridges

Setunge, Sujeeva; Zhu, Weiqi; Gravina, Rebecca; Gamage, Nirdosha

doi:10.1061/(asce)cf.1943-5509.0000754

Cited by 9 publications

(6 citation statements)

References 8 publications

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“…In FTA, either one or several input events may be combined together to form the output event through a logic gate (Setunge et al 2015). These input events are connected to the output event using logic gates such as AND or OR (Davis-McDaniel et al 2013).…”

Section: Fault Tree Analysis (Fta)mentioning

confidence: 99%

“…These input events are connected to the output event using logic gates such as AND or OR (Davis-McDaniel et al 2013). In order to use an AND gate, all the input events must contribute at the same time for output event to occur while OR gate can be used if any one of the input events contribute for the output event (Setunge et al 2015). In this analysis, a general fault tree diagram was developed for pre stressed concrete bridges and timber bridges.…”

Section: Fault Tree Analysis (Fta)mentioning

confidence: 99%

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Vulnerability assessment of bridges subjected to extreme cyclonic events

Pathiranage

Lokuge

2020

Nat Hazards

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Over the past few years Queensland in Australia has suffered from a number of severe tropical cyclones, the most recent one being Marcia, that took place in 2015. Damage bill of Cyclone Marcia exceeded $50 million which included cost of repairing a number of damaged road structures. Failure of road structures such as bridges isolates communities from accessing essential services and commodities. This necessitated a methodical approach to evaluate the failure of bridges to improve their resilience and provide base knowledge for developing emergency maintenance response. Although there are several methods available to evaluate the vulnerability of bridges , fault tree analysis (FTA) was selected in this study by considering its positive attributes over the other methods. FTA was used to estimate the probabilities of failure of main components (superstructure and substructure) and elements of timber and concrete bridges. Secondary data (level 1 and level 2 bridge inspection reports from Transport Main Roads in Rockhampton) before and after the Cyclone Marcia were used in conjunction with expert advice to construct fault trees for both timber and concrete bridges. Potential failure mechanisms were observed and the degree of susceptibility of main components of timber and concrete bridges to cyclonic events were evaluated. This research was based on selected bridges under specific cyclone in one region, which is a limitation of the study. Few other case study bridges subjected to cyclonic events can be used to strengthen the understanding of the complete dynamics of the bridge failure under these extreme events.

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Section: Fault Tree Analysis (Fta)mentioning

confidence: 99%

Section: Fault Tree Analysis (Fta)mentioning

confidence: 99%

Vulnerability assessment of bridges subjected to extreme cyclonic events

Pathiranage

Lokuge

2020

Nat Hazards

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“…Civil infrastructure deterioration poses a serious challenge to public safety and the economy worldwide (Wang and Elhag, 2007;Kobayashi, Do, and Han, 2010;Sun and Gu, 2011;Setunge et. al., 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Several methods have been applied to estimate infrastructure deterioration due to element interactions (Sianipar and Adam, 1997;Morcous et. al., 2002;Setunge et. al., 2016).…”

Section: Introductionmentioning

confidence: 99%

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Condition State–Based Civil Infrastructure Deterioration Model on a Structure System Level

Shen

Goodall

Chase

2019

J. Infrastruct. Syst.

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The successful prediction of civil infrastructure's deterioration process is crucial for making optimal maintenance, rehabilitation, and replacement (MR&R) decisions under financial constraints. The majority of current deterioration models simulate the deterioration process of a single structure element of civil infrastructure; such models thus ignore the interaction between dependent elements. However, the interaction between structure elements often plays an important role in the deterioration of the overall structure. Therefore, the primary objective of this paper is to address the interaction of these structure elements by developing a method to simulate the deterioration process of civil infrastructure on a system level. The proposed method will also provide a measure of the uncertainty of the simulation using Markov Chain Monte Carlo (MCMC) to estimate the optimal parameters of the Markov Chain and the probability distribution of those parameters. The Monte Carlo simulation is then used to generate a large

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