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Safety of Dams: A Pathological Approach of Qualitative and Quantitative Risks

2016; Volume: 10; Issue: 9 Linguagem: Inglês

10.17265/1934-7359/2016.09.007

1934-7359

Flavio Augusto Settimi Sohler, Laura Caldeira,

Infrastructure Resilience and Vulnerability Analysis

Dams are critical and essential elements in any infrastructure and, in front of accidents occurred in many countries, it is extremely important to know the risk of these structures.Inserted in this context, it was found in the technical literature, methods and tools capable of measuring the exposure value by means of indicators.In the study, the highlights were 12 methods of qualitative, semiquantitative and quantitative risk analysis, representing an overview of risk analysis methods available in the literature with potential use in dams, that it has been done into electronic spreadsheets.The case study is performed on a sample of concrete dam and earth/rockfill built and operated by Eletrobrás Furnas Company, supported by documentary research, projects, field inspections and interviews with experts.After applying the methods and the analysis thereof, has been prepared the Eletrobras Furnas dam risk analysis method which is characterized by adapting the criteria analyzed to the reality of the company's dams and it was also performed the portfolio risk analysis of 18 dams.In spite of the variety and subjectivity of qualitative and semiquantitative methods, the results show that they tend to converge on the analysis of dam based on risk.The application methodology demonstrates the feasibility assessment stage, covering the preliminary analysis for portfolio dams, followed by formal and individual risk analyzes for the most critical structures.These results confirm the applicability of risk analysis techniques, contributing to the consolidation of this tool as fundamental in the dam safety.