Structural Engineering and Mechanics

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Parametric study on earthquake induced pounding between adjacent buildings

  • Naserkhaki, Sadegh (Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia) ;
  • Abdul Aziz, Farah N.A. (Department of Civil Engineering, Faculty of Engineering, Universiti Putra Malaysia) ;
  • Pourmohammad, Hassan (Department of Civil Engineering, Faculty of Engineering, Islamic Azad University)
  • Received : 2011.02.28
  • Accepted : 2012.08.07
  • Published : 2012.08.25
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Abstract

Pounding between closely located adjacent buildings is a serious issue of dense cities in the earthquake prone areas. Seismic responses of adjacent buildings subjected to earthquake induced pounding are numerically studied in this paper. The adjacent buildings are modeled as the lumped mass shear buildings subjected to earthquake acceleration and the pounding forces are modeled as the Kelvin contact force model. The Kelvin model is activated when the separation gap is closed and the buildings pound together. Characteristics of the Kelvin model are extensively explored and a new procedure is proposed to determine its stiffness. The developed model is solved numerically and a SDOF pounding case as well as a MDOF pounding case of multistory adjacent buildings are elaborated and discussed. Effects of different separation gaps, building heights and earthquake excitations on the seismic responses of adjacent buildings are obtained. Results show that the seismic responses of adjacent buildings are affected negatively by the pounding. More stories pound together and pounding is more intense if the separation gap is smaller. When the height of buildings differs significantly, the taller building is almost unaffected while the shorter building is affected detrimentally. Finally, the buildings should be analyzed case by case considering the potential earthquake excitation in the area.

Keywords

References

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