Journal
JOURNAL OF CLEANER PRODUCTION
Volume 202, Issue -, Pages 904-915Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2018.08.177
Keywords
Sustainable criteria; Uncertainty; Decision-making; Multi-objective optimization; Energy efficiency
Categories
Funding
- Spanish Ministry of Economy and Competitiveness
- FEDER [BIA2017-85098-R]
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Today, bridge design seeks not only to minimize cost, but also to minimize adverse environmental and social impacts. This multi-criteria decision-making problem is subject to variability of the opinions of stakeholders regarding the importance of criteria for sustainability. As a result, this paper proposes a method for designing and selecting optimally sustainable bridges under the uncertainty of criteria comparison. A Pareto set of solutions is obtained using a metamodel-assisted multi-objective optimization. A new decision-making technique introduces the uncertainty of the decision-maker's preference through triangular distributions and thereby ranks the sustainable bridge designs. The method is illustrated by a case study of a three-span post-tensioned concrete box-girder bridge designed according to the embodied energy, overall safety and corrosion initiation time. In this particular case, 211 efficient solutions are reduced to two preferred solutions which have a probability of being selected of 81.6% and 18.4%. In addition, a sensitivity analysis validates the influence of the uncertainty regarding the decision making. The approach proposed allows actors involved in the bridge design and decision-making to determine the best sustainable design by finding the probability of a given design being chosen. (C) 2018 Elsevier Ltd. All rights reserved.
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