Yousefi, Ali
(2013)
Application Of Multi-Criteria Decision Making
Approaches In Prioritizing Highway Bridges
Inventory For Seismic Retrofitting.
Masters thesis, Universiti Sains Malaysia.
Abstract
Many of the bridges are old or were designed without seismic design
considerations in areas with potential earthquake hazard. These bridges are
vulnerable from even moderate earthquakes and require to be retrofitted in some
degree for reducing the future social and economic costs. Besides, the process of
seismic retrofitting is extremely costly and time consuming moreover the constraint
in resources prevents the retrofitting of all the existing bridges simultaneously.
Hence, the bridges must be prioritized with simultaneous consideration of multiple
criteria including technical and socioeconomic issues.
This study intends to identify the major criteria and their weight for evaluation
of highway bridges and providing an effective technique to prioritize the bridges.
Suggested criteria include structural vulnerability, seismic hazard, anticipated service
life, average daily traffic, interface with other lifelines, alternative routes and bridge
importance. To assess the weight of criteria the Analytic Hierarchy Process (AHP)
technique is carried out. Since the problem involving a large number of alternatives
(bridges) and multiple criteria, VIKOR (VlseKriterijumskaOptimizacija I KompromisnoResenje)
and TOPSIS (Technique for Order Preference by Similarity to an
Ideal Solution) methods as Multi-Criteria Decision-Making (MCDM) model are
applied for prioritizing of bridges. These methods reduce multitude alternative
performances into a single value and prioritize the alternatives (bridges) based on
their ranking score.
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