Comparison of stochastic prediction models based on visual inspections of bridge decks. Issue 5 (4th July 2017)

• Record Type: Journal Article
• Authors: Zambon, Ivan; Vidovic, Anja; Strauss, Alfred; Matos, Jose; Amado, Joao
• Is Part Of: Journal of civil engineering and management. Volume 23:Issue 5(2017)
• Page Start: 553
• Page End: 561
• Publication Date: 2017-07-04
• Subjects: stochastic prediction models -- Markov process -- gamma process -- bridge management system -- condition rating -- visual inspection; Civil engineering -- Periodicals; Civil engineering; Periodicals; 624.05
• DOI: 10.3846/13923730.2017.1323795
• Languages: English
• ISSNs: 1822-3605

Abstract

Abstract: Due to a considerable amount of information required to support the decision-making processes, an increasing number of infrastructure owners use computerized management systems. Bridges, being complex and having significant impact on society, have often been the foundation for the development of these systems. In order to manage bridges effectively, condition prediction models are incorporated to the core of decision-making processes. Many of developed and applied stochastic prediction models show certain limitations. The impact of these limitations on deterioration predictions cannot be objectively evaluated without direct comparison of prediction results. Hence, several stochastic prediction models based on condition ratings obtained from visual inspections of bridge decks are compared in this article. Models are described and implemented on the data of around 1100 reinforced concrete bridge decks from the 'Infraestruturas de Portugal', a state owned Portuguese general concessionaire for roadways and railways. The statistical analysis of different models revealed significant deviations, particularly in higher condition ratings. Results indicate limited prediction capability of a simple homogeneous Markov chain model when compared with timea-nd space-continuous models, such as the gamma process model.