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Comparison between uniform deformation method and Genetic Algorithm for optimizing mechanical properties of dampers

Karami Mohammadi, R ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.12989/eas.2018.14.1.001
  3. Publisher: Techno Press , 2018
  4. Abstract:
  5. Seismic retrofitting of existing buildings and design of earth-quake resistant buildings are important issues associated with earthquake-prone zones. Use of metallic-yielding dampers as an energy dissipation system is an acceptable method for controlling damages in structures and improving their seismic performance. In this study, the optimal distribution of dampers for reducing the seismic response of steel frames with multi-degrees freedom is presented utilizing the uniform distribution of deformations. This has been done in a way that, the final configuration of dampers in the frames lead to minimum weight while satisfying the performance criteria. It is shown that such a structure has an optimum seismic performance, in which the maximum structure capacity is used. Then the genetic algorithm which is an evolutionary optimization method is used for optimal arrangement of the steel dampers in the structure. In continuation for specifying the optimal accurate response, the local search algorithm based on the gradient concept has been selected. In this research the introduced optimization methods are used for optimal retrofitting in the moment-resisting frame with inelastic behavior and initial weakness in design. Ultimately the optimal configuration of dampers over the height of building specified and by comparing the results of the uniform deformation method with those of the genetic algorithm, the validity of the uniform deformation method in terms of accuracy, Time Speed Optimization and the simplicity of the theory have been proven. © 2018 Techno-Press, Ltd
  6. Keywords:
  7. Genetic algorithm ; Metallic-yielding damper ; Uniform deformation method ; Deformation ; Earthquakes ; Energy dissipation ; Genetic algorithms ; Retrofitting ; Seismic design ; Seismic response ; Seismic waves ; Structural frames ; Energy dissipation system ; Evolutionary optimization method ; Local search algorithm ; Metallic yielding dampers ; Moment resisting frames ; Optimal outline configuration of dampers ; Optimal retrofitting ; Uniform deformation ; Structural optimization
  8. Source: Earthquake and Structures ; Volume 14, Issue 1 , February , 2018 , Pages 1-10 ; 20927614 (ISSN)
  9. URL: http://koreascience.or.kr/article/JAKO201808962644146.page