Earthquakes and Structures

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Seismic pounding between adjacent buildings considering soil-structure interaction

  • Raheem, Shehata E Abdel (Civil Engineering Dept., Faculty of Engineering, Assiut University) ;
  • Alazrak, Tarek M.A. (Nuclear Power Plants Authority (NPPA)) ;
  • AbdelShafy, Aly G.A. (Civil Engineering Dept., Faculty of Engineering, Assiut University) ;
  • Ahmed, Mohamed M. (Civil Engineering Dept., Faculty of Engineering, Assiut University) ;
  • Gamal, Yasser A.S. (Civil Engineering Dept., High Institute of Engineering Technology)
  • Received : 2020.07.21
  • Accepted : 2020.01.07
  • Published : 2021.01.25
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Abstract

In urban cities, buildings were built in the neighborhood, these buildings influence each other through structure-soilstructure interaction (SSSI) and seismic pounding due to limited separation distance in-between. Generally, the effects of the interaction between soil and structure are disregarded during seismic design and analysis of superstructure. However, the system of soil-base adversely changes structural behavior and response demands. Thus, the vibration characteristics plus the seismic response of a building are not able to be independent of those in adjacent buildings. The interaction between structure, soil, and structure investigates the action of the attendance of adjacent buildings to the others by the interaction effect of the sub-soil under dynamic disturbances. The main purpose of this research is to analyze the effects of SSSI and seismic pounding on the behavior of adjacent buildings. The response of a single structure or two adjacent structures with shallow raft base lying on soft soil are studied. Three dimensions finite element models are developed to investigate the effects of pounding; gap distance; conditions of soil; stories number; a mass of adjacent building and ground excitation frequency on the seismic responses and vibration characteristics of the structures. The variation in the story displacement, story shear, and story moment responses demands are studied to evaluate the presence effect of the adjacent buildings. Numerical results acquired using conditions of soil models are compared with the condition of fixed support and adjacent building models to a single building model. The peak responses of story displacement, story moment, and story shear are studied.

Keywords

References

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