Optimal Bridge Maintenance of Large Number of Bridges Using Robust Genetic Algorithm

In the maintenance planning, life cycle cost (LCC) can be reduced by treating multiple bridges simultaneously. However, it is difficult for a practical case to establish an optimal plan that reduces LCC because there is a large number of bridges to be maintained. In this study, an attempt is made to propose an optimal planning method for a large number of bridges in two stages by using a genetic algorithm (GA). In the first stage, the proposed method optimizes a maintenance plan for a single bridge with considering for preventive maintenance. Here, this optimal plan involves some periods in which maintenance works can be postponed without increasing LCC under the same safety condition. Then, in the second stage, the proposed method minimizes the total LCC of a large number of bridges by using each maintenance plan obtained for a single bridge, modifying it using such flexible periods involved in the maintenance plan, and calculating the total LCC by summing up the LCC for single bridge. Furthermore, the effects of budget constraints on LCC minimization are discussed. Numerical examples are presented to demonstrate the applicability of the proposed method.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 2282-2291
  • Monograph Title: Structures Congress 2014

Subject/Index Terms

Filing Info

  • Accession Number: 01522622
  • Record Type: Publication
  • ISBN: 9780784413357
  • Files: TRIS, ASCE
  • Created Date: Apr 9 2014 3:03PM