Optimized retrofit of steel-concrete composite buildings against progressive collapse using steel cables

Georgios S. Papavasileiou*, Nikolaos G. Pnevmatikos

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

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This paper investigates the cost-effective use of steel cables as a means of structural retrofit for seismically designed steel-concrete composite buildings in order to withstand progressive collapse. Progressive collapse is a topic of increased scientific interest for engineering researchers, mainly due to its destructive results, as well as the fact that it is large scale structural failure caused by small scale initial damage. Extreme actions, such as a strong earthquake, or an accident can cause severe damage to load bearing elements. Even though it seems to be a problem that mainly high-rise buildings face, due to the exploitation of the materials’ capacity within the deformation range of their non-linear performance during structural design, the majority of newly designed buildings are susceptible to this type of failure.

Cables are used as a means to retrofit buildings because of their advantages over their alternatives: they are not susceptible to flexural or lateral torsional buckling, as they receive only tensile forces. Also, their installation in existing buildings and their replacement in case of failure is easy thanks to the type of connections realized. For the determination of the most cost-effective design, the “Evolution Strategies” optimization algorithm is employed, in order to enable the investigation of the overall design philosophy. An optimized design is the one which meets all applicable requirements and has the smallest cost at the same time, i.e. the design which achieves the optimum use of the materials.
Original languageEnglish
Number of pages8
Publication statusPublished - 18 Jun 2018
Externally publishedYes
Event16th European Conference on Earthquake Engineering - Thessaloniki, Greece
Duration: 18 Jun 201821 Jun 2018


Conference16th European Conference on Earthquake Engineering
Abbreviated title16ECEE
Internet address


  • steel-concrete composite structures
  • progressive collapse
  • steel cables
  • optimization
  • retrofit


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