Combinatorial optimization of latticed blocks composed of various unit shapes for seismic retrofit

Kotaro Fukushima, Makoto Ohsaki, Tomohiro Mikami, Yuji Miyazu

Research output: Contribution to journalArticle

1 Citation (Scopus)


FRP blocks are effectively used for reduction of cost and period of time for seismic retrofit of building frames, because they can be manufactured in plants and attached to the existing frame easily. The performance of shear wall consisting of FRP blocks can be improved by using unit latticed blocks of various shapes. However, if the shape of latticed blocks is optimized considering the thickness of each lattice member as continuous variable, the optimal solution has many thin members, which is not practically appropriate. In this paper, a combinatorial optimization approach is presented for shape optimization of shear wall consisting of unit blocks of various pre-determined shapes. It is shown in the numerical examples that the performances such as lateral stiffness and maximum shear force in the existing beam can be improved by optimizing the combination of units.

Original languageEnglish
Pages (from-to)1657-1664
Number of pages8
JournalJournal of Structural and Construction Engineering
Issue number728
Publication statusPublished - Oct 2016



  • Buildingframe
  • Combinatorial optimization
  • Latticed block
  • Seismic retrofit
  • Simulated annealing

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