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Arabian Journal for Science and Engineering

, Volume 44, Issue 5, pp 4931–4945 | Cite as

Probabilistic Evaluation of Structural Pounding Between Adjacent Buildings Subjected to Repeated Seismic Excitations

  • Fadzli Mohamed NazriEmail author
  • Mahmoud Ali Miari
  • Moustafa Moffed Kassem
  • Chee-Ghuan Tan
  • Ehsan Noroozinejad Farsangi
Research Article - Civil Engineering
  • 23 Downloads

Abstract

This research investigates the effects of structural pounding (collision of structures) caused by insufficient gaps between adjacent buildings when subjected to repeated earthquakes. The structural performance of adjacent buildings experiencing structural pounding under the effect of moderate repeated ground motions is analyzed using incremental dynamic analysis. Fragility curves for different performance levels are developed to represent the capacity of the adjacent buildings. Two four-story and two ten-story frames, regular and irregular, are combined to represent nine different cases of structural pounding and subsequently analyzed under three artificial seismic sequences. Three gap cases that measure 1 mm (contact structures), 10 cm, and 1 m are assigned to consider possible pounding combinations. Analysis results show that structural damage is directly proportional to ground motion intensity and structural irregularity and inversely proportional to gaps between structures. A minimum spacing of 1 m is proposed for buildings in areas that experience repeated earthquakes to avoid structural pounding. In regular frames, main damage is concentrated in the bottom story beams. Meanwhile, damage in irregular frames is concentrated in top and bottom story beams. Hence, additional stiffness that corresponds to the height of short buildings should be assigned to beams (immediate above and bottom). Meanwhile, the damage is concentrated in ground floor columns. Therefore, to avoid soft story failure mechanism, additional stiffness should be added to columns at bottom stories, especially on the ground floor. Based on the obtained results, modern seismic design codes need to be updated to address these findings on structural pounding to reduce damage in adjacent buildings during moderate to major seismic events.

Keywords

Structural pounding Repeated earthquake Nonlinear analysis Regular and irregular building IDA Seismic code ISDR 

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Notes

Acknowledgements

This study was supported by the Universiti Sains Malaysia, under the Research University Individual (RUI) Grant Scheme (8014080) and Research Fund Assistance, University of Malaya (BK057-2015).

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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.School of Civil EngineeringUniversiti Sains MalaysiaNibong TebalMalaysia
  2. 2.Department of Civil Engineering, Faculty of EngineeringUniversity of MalayaKuala LumpurMalaysia
  3. 3.Department of Earthquake Engineering, School of Civil EngineeringGraduate University of Advanced Technology (KGUT)KermanIran

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