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Assessment and maintenance of bridges – requirements, objectives, and strategies
Citation Link: https://doi.org/10.15480/882.1308
Publikationstyp
Doctoral Thesis
Date Issued
2016
Sprache
English
Author(s)
Advisor
Referee
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2015-11-25
Institut
TORE-DOI
First published in
Schriftenreihe des Instituts für Massivbau der TUHH;13
Number in series
13
Publisher
Shaker Verlag
From an ideal point of view, bridges should be designed, constructed and operated in such a way that they fulfil requirements from the fields of function, economy, environment, society, and culture. The present thesis wants to contribute to this matter by illuminating the manifold requirements and by developing a practicable approach to multi-objective maintenance planning for bridges.
Starting with a literature review and a survey on practical maintenance planning by bridge owning agencies in Hamburg (Germany) and Chennai (India), the investigation reveals that until today practical approaches for the identification of bridge specific requirements as well as for strategy assessment and evaluation are not at hand. Instead of accounting for the whole range of performance aspects, the current investigations of maintenance strategies are commonly confined to functional and economic aspects. In exceptional cases where societal, cultural and also environmental issues are considered, these aspects are usually treated in monetary terms. A common monetary evaluation of the different aspects, however, inevitably causes a distorted perception of reality.
As a solution to this problem, the present thesis develops a practical approach to multi-objective maintenance planning. The aim of this approach is to develop customed strategies in order to fulfil the bridge specific requirements. At its core is the newly invented SAMS program, which allows for simulation based assessment of maintenance strategies. The program uses Monte Carlo simulation technique and thoroughly takes into account the interdependen-cies between structure, deterioration, and maintenance effects, which occur in the bridge specific context. As a result, it provides value distributions of indicators, which give a description of the strategy-depended bridge performance relating to condition, structural safety, economy, society, and culture. The SAMS program is effectively combined with a specifically developed method for true and undistortive multi-objective strategy evaluation. In addition to this, a questionnaire for identifying bridge specific requirements is applied—a tool newly developed for the survey in Hamburg and Chennai. The experimental application of the approach on two case study bridges shows that suitable strategies for fulfilling the bridge specific requirements can be identified. It is also found that the bridge specific context decisively influences the extent, to which strategies can play out their specific strengths.
Starting with a literature review and a survey on practical maintenance planning by bridge owning agencies in Hamburg (Germany) and Chennai (India), the investigation reveals that until today practical approaches for the identification of bridge specific requirements as well as for strategy assessment and evaluation are not at hand. Instead of accounting for the whole range of performance aspects, the current investigations of maintenance strategies are commonly confined to functional and economic aspects. In exceptional cases where societal, cultural and also environmental issues are considered, these aspects are usually treated in monetary terms. A common monetary evaluation of the different aspects, however, inevitably causes a distorted perception of reality.
As a solution to this problem, the present thesis develops a practical approach to multi-objective maintenance planning. The aim of this approach is to develop customed strategies in order to fulfil the bridge specific requirements. At its core is the newly invented SAMS program, which allows for simulation based assessment of maintenance strategies. The program uses Monte Carlo simulation technique and thoroughly takes into account the interdependen-cies between structure, deterioration, and maintenance effects, which occur in the bridge specific context. As a result, it provides value distributions of indicators, which give a description of the strategy-depended bridge performance relating to condition, structural safety, economy, society, and culture. The SAMS program is effectively combined with a specifically developed method for true and undistortive multi-objective strategy evaluation. In addition to this, a questionnaire for identifying bridge specific requirements is applied—a tool newly developed for the survey in Hamburg and Chennai. The experimental application of the approach on two case study bridges shows that suitable strategies for fulfilling the bridge specific requirements can be identified. It is also found that the bridge specific context decisively influences the extent, to which strategies can play out their specific strengths.
Subjects
Bridges; Maintenance; Deterioration; Assessment; Requirements; Performance indicators; Simulation
DDC Class
720: Architektur
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