• 한국전산구조공학회논문집
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• 제27권5호
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• pp.451-458
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• 2014

본 연구는 초고층 건축물의 기본계획을 바탕으로 철근콘크리트 코어 벽체의 두께를 최적화하여 실시설계에 적용하는 과정에서, StrAuto를 통한 수많은 케이스의 반복해석을 통하여 최적 케이스를 찾아내어, 설계 방향과 한계에 대한 가이드라인을 설정하기 위한 프로세스를 구축하기 위한 실용화 연구이다. 코어 벽체의 두께와 강도를 변경하면서 StrAuto를 통해 반복해석을 수행하고 해석결과를 시각적으로 표현하여 설계자가 어떤 방향으로 설계를 진행할지를 결정하는데 중요한 참고자료로 활용하도록 프로세스를 정립하였다. 본 논문은 기본적인 구조설계가 완료된 상태에서 설계자가 원하는 방향에 대한 수많은 케이스를 빠르게 검토하여 올바른 실시 설계 방향을 설정하는 프로세스를 구축했다는 점에서 큰 의의를 찾을 수 있다.

• Steel and Composite Structures
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• 제21권3호
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• pp.605-628
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• 2016

The energy absorption characteristics of diamond core sandwich cylindrical columns under axial crushing process depend greatly on the amount of material which participates in the plastic deformation. Both the single-objective and multi-objective optimizations are performed for columns under axial crushing load with core thickness and helix pitch of the honeycomb core as design variables. Models are optimized by multi-objective particle swarm optimization (MOPSO) algorithm to achieve maximum specific energy absorption (SEA) capacity and minimum peak crushing force (PCF). Results show that optimization improves the energy absorption characteristics with constrained and unconstrained peak crashing load. Also, it is concluded that the aluminum tube has a better energy absorption capability rather than steel tube at a certain peak crushing force. The results justify that the interaction effects between the honeycomb and column walls greatly improve the energy absorption efficiency. A ranking technique for order preference (TOPSIS) is then used to sort the non-dominated solutions by the preference of decision makers. That is, a multi-criteria decision which consists of MOPSO and TOPSIS is presented to find out a compromise solution for decision makers. Furthermore, local and global sensitivity analyses are performed to assess the effect of design variable values on the SEA and PCF functions in design domain. Based on the sensitivity analysis results, it is concluded that for both models, the helix pitch of the honeycomb core has greater effect on the sensitivity of SEA, while, the core thickness has greater effect on the sensitivity of PCF.