하모니서치 알고리즘 활용한 CFRP 보강 콘크리트 단면의 최적 및 사용성 설계

초록

Corrosion of rebar can reduce the safety and durability of structures, and various studies on FRP(Fiber Reinforced Polymer) Rebar reinforced concrete are being conducted to use it as a substitute for rebar. In this study, the Harmony Search algorithm was used for the optimal design of the CFRP Rebar reinforced concrete section, and the optimal section satisfying the minimum cost and deflection conditions was derived through the ACI 440.1R-15 example model. For comparison purposes, both single-objective and multi-objective optimization were performed, and the results from each optimization showed differences. The single-objective optimization resulted in extreme cross-sectional designs that prioritized either cost or deflection. To mitigate this issue and account for structural uncertainties, a multi-objective optimization was performed, considering both cost and deflection as objectives. The single-objective Harmony Search algorithm showed a trade-off between cost and deflection. However, the multi-objective Harmony Search algorithm showed that the Pareto front was uniformly distributed. A section that balances the minimum cost and minimum deflection was derived, and both the cost and deflection were low when the parameters HMCR=0.7 and PAR=0.3 were set.

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