Multi-objective and probabilistic decision-making approaches to sustainable design and management of highway bridge decks

摘要

In this paper, a simplified approach to sustainable design and management of highway bridge decks is proposed in which relevant data on some key social, economic and environmental performance measures are provided to support effective decision-making. The socioeconomic performance measures include physical condition of the deck, life cycle costs to owners and users, including accident costs, traffic delay costs and vehicle operating costs. The environmental performance measures include C02 emissions and construction waste. The proposed life cycle-based design and management approach is based on probabilistic mechanistic models that predict the time varying probabilities of chloride contamination, reinforcement corrosion, and corrosion -induced damage of the deck. The proposed approach is illustrated on the life cycle design and management of highway bridge decks using normal and high performance concrete. It is shown that high performance concrete decks outperform normal concrete decks in terms of longer service life, lower life cycle costs, and higher reductions in C02 emissions and waste materials.