Shake-table responses of a low-rise RC building model having irregularities at first story

Han Seon Lee, Dong Wook Jung, Kyung Bo Lee, Hee Cheul Kim, Kihak Lee

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9 Citations (Scopus)

Abstract

This paper presents the seismic responses of a 1:5-scale five-story reinforced concrete building model, which represents a residential apartment building that has a high irregularity of weak story, soft story, and torsion simultaneously at the ground story. The model was subjected to a series of uni- and bi-directional earthquake simulation tests. Analysis of the test results leads to the following conclusions: (1) The model survived the table excitations simulating the design earthquake with the PGA of 0.187 g without any significant damages, though it was not designed against earthquakes; (2) The fundamental mode was the torsion mode. The second and third orthogonal translational modes acted independently while the torsion mode showed a strong correlation with the predominant translational mode; (3) After a significant excursion into inelastic behavior, this correlation disappeared and the maximum torsion and torsion deformation remained almost constant regardless of the intensity of the two orthogonal excitations; And, (4) the lateral resistance and stiffness of the critical columns and wall increased or decreased significantly with the large variation of acting axial forces caused by the high bidirectional overturning moments and rocking phenomena under the bi-directional excitations.

Original languageEnglish
Pages (from-to)517-539
Number of pages23
JournalStructural Engineering and Mechanics
Volume40
Issue number4
DOIs
Publication statusPublished - 2011 Nov 25

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Keywords

  • Bi-directional excitation
  • Earthquake simulation test
  • Irregularity
  • Reinforced concrete
  • Torsion

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Mechanical Engineering

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