Designing against earthquake and progressive collapse: A structural optimization approach applied to composite steel-concrete buildings

Dimos C. Charmpis, Georgios Papavasileiou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The present work presents an optimization procedure for the design of structures able to resist earthquake actions and progressive collapse. An evolutionary optimization algorithm is employed to minimize structural cost subject to conventional design requirements on safety of structural members and structural system resistance against earthquake; additionally, requirements on progressive collapse resistance are imposed to study their effect on the optimal designs attained. A method based on the notional removal of key-elements of a structure is used to direct the optimizer towards identifying a structural design, which provides adequate alternate load paths when local failure occurs in the structure. A numerical application involving the design of a 6-storey composite steel-concrete building demonstrates the effectiveness of the proposed optimization approach. Of particular importance is also the investigation of the variation in the structural cost achieved when progressive collapse resistance constraints are incorporated in the design process. By enforcing the satisfaction of additional design requirements on system resistance and safety against local failure, structural cost is inevitably increased due to the need for extra material weight/volume. This increase is quantitatively explored by comparing designs obtained with and without progressive collapse resistance constraints.
Original languageEnglish
Title of host publicationProceedings of the 7th European Conference on Steel and Composite Structures (Eurosteel 2014)
Publication statusPublished - 2014
Event7th European Conference on Steel and Composite Structures - Napoli, Italy
Duration: 10 Sep 201412 Sep 2014

Conference

Conference7th European Conference on Steel and Composite Structures
Abbreviated titleEurosteel 2014
CountryItaly
CityNapoli
Period10/09/1412/09/14

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Keywords

  • Steel-Concrete Composite
  • optimization
  • Earthquake

Cite this

Charmpis, D. C., & Papavasileiou, G. (2014). Designing against earthquake and progressive collapse: A structural optimization approach applied to composite steel-concrete buildings. In Proceedings of the 7th European Conference on Steel and Composite Structures (Eurosteel 2014)