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Seismic collapse propagation in 6-story RC regular and irregular buildings

  • Karimiyan, Somayyeh ;
  • Moghadam, Abdolreza S. ;
  • Karimiyan, Morteza ;
  • Kashan, Ali Husseinzadeh
  • Received : 2013.06.12
  • Accepted : 2013.09.13
  • Published : 2013.12.20

Abstract

One of the most important issues in progressive collapse mechanism of the buildings is evaluation of the collapse distribution in presence of the earthquake loads. Here, collapse propagation is investigated by tracking down the location and type of the collapsed beam and column elements, from the first element to the entire buildings. 6-story reinforced concrete ordinary moment resisting frame buildings with one directional mass eccentricity of 0%, 5%, 15% and 25% are studied to investigate differences among the progressive collapse mechanism of the regular and irregular buildings. According to the results of the nonlinear time history analyses, there are some patterns to predict progressive collapse scenarios in beam and column elements of the similar regular and irregular buildings. Results also show that collapse distribution patterns are approximately independent of the earthquake records.

Keywords

irregular buildings;collapse distribution;progressive collapse;reinforced concrete buildings;earthquake load

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