Steel and Composite Structures

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Identifying the hysteretic energy demand and distribution in regular steel frames

  • Akbas, Bulent (Department of Earthquake and Structural Science, Gebze Institute of Technology) ;
  • Shen, Jay (Department of Civil and Architectural Engineering, Illinois Institute of Technology) ;
  • Temiz, Hakan (Department of Earthquake and Structural Science, Gebze Institute of Technology)
  • Received : 2005.07.20
  • Accepted : 2006.06.15
  • Published : 2006.12.25
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Abstract

Structures in seismic regions are designed to dissipate seismic energy input through inelastic deformations. Structural or component failure occurs when the hysteretic energy demand for a structure or component subject to an earthquake ground motion (EQGM) exceeds its hysteretic energy dissipation capacity. This paper presents a study on identifying the hysteretic energy demand and distribution throughout the height of regular steel moment resisting frames (SMRFs) subject to severe EQGMs. For this purpose, non-linear dynamic time history (NDTH) analyses were carried out on regular low-, medium-, and high-rise steel SMRFs. An ensemble of ninety EQGMs recorded on different soil types was used in the study. The results show that the hysteretic energy demand decreases from the bottom stories to the upper stories and for high-rise structures, most of the hysteretic energy is dissipated by the bottom stories. The decrease is quite significant, especially, for medium- and high-rise structures.

Keywords

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