Life-cycle optimization of FRP-strengthening interventions for RC bridge superstructures

David Y. Yang, Dan M. Frangopol, Jinguang Teng

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


This paper presents a systematic method for the optimization of strengthening interventions using fiber reinforced polymer (FRP) for reinforced concrete (RC) bridge superstructures considering two conflicting objectives: life-cycle performance and strengthening cost. The methodology is capable of finding optimal strengthening times for different structural components of an RC bridge superstructure in the form of a Pareto front that can directly facilitate the scheduling and design of FRP-strengthening interventions. Cumulative-time failure probabilities from time-dependent reliability analysis are used as an indicator of life-cycle performance. By virtue of efficient sampling algorithms, cumulative-time failure probabilities can be computed directly during the optimization process. A component-wise bookkeeping technique compatible with parallel computing is employed to further improve computational efficiency. This new method is illustrated using an RC bridge superstructure under chloride-induced corrosion. The proposed method is the first of its kind for optimizing FRPstrengthening interventions for RC bridge superstructures from life-cycle and reliability perspectives.
Original languageEnglish
Title of host publicationLife-Cycle of Engineering Systems
Subtitle of host publicationEmphasis on Sustainable Civil Infrastructure - 5th International Symposium on Life-Cycle Engineering, IALCCE 2016
PublisherCRC Press/Balkema
Number of pages8
ISBN (Print)9781138028470
Publication statusPublished - 1 Jan 2017
Event5th International Symposium on Life-Cycle Engineering, IALCCE 2016 - Delft, Netherlands
Duration: 16 Oct 201620 Oct 2016


Conference5th International Symposium on Life-Cycle Engineering, IALCCE 2016

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Safety, Risk, Reliability and Quality

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