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The use of Artificial Neural Networks to estimate seismic damage and derive vulnerability functions for traditional masonry |
Tiago Miguel FERREIRA1(), João ESTÊVÃO2, Rui MAIO3, Romeu VICENTE3 |
1. ISISE, Institute of Science and Innovation for Bio-Sustainability (IB-S), Department of Civil Engineering, University of Minho, Guimarães 4800-058, Portugal 2. Department of Civil Engineering, University of Algarve, Faro 8005-139, Portugal 3. RISCO, Department of Civil Engineering, University of Aveiro, Aveiro 3810-193, Portugal |
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Abstract This paper discusses the adoption of Artificial Intelligence-based techniques to estimate seismic damage, not with the goal of replacing existing approaches, but as a mean to improve the precision of empirical methods. For such, damage data collected in the aftermath of the 1998 Azores earthquake (Portugal) is used to develop a comparative analysis between damage grades obtained resorting to a classic damage formulation and an innovative approach based on Artificial Neural Networks (ANNs). The analysis is carried out on the basis of a vulnerability index computed with a hybrid seismic vulnerability assessment methodology, which is subsequently used as input to both approaches. The results obtained are then compared with real post-earthquake damage observation and critically discussed taking into account the level of adjustment achieved by each approach. Finally, a computer routine that uses the ANN as an approximation function is developed and applied to derive a new vulnerability curve expression. In general terms, the ANN developed in this study allowed to obtain much better approximations than those achieved with the original vulnerability approach, which has revealed to be quite non-conservative. Similarly, the proposed vulnerability curve expression was found to provide a more accurate damage prediction than the traditional analytical expressions.
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Keywords
Artificial Neural Networks
seismic vulnerability
masonry buildings
damage estimation
vulnerability curves
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Corresponding Author(s):
Tiago Miguel FERREIRA
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Just Accepted Date: 19 April 2020
Online First Date: 25 May 2020
Issue Date: 13 July 2020
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