Earthquakes and Structures

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Seismic performance of reinforced concrete shear wall buildings with underground stories

  • Saad, George (Department of Civil and Environmental Engineering, American University of Beirut) ;
  • Najjar, Shadi (Department of Civil and Environmental Engineering, American University of Beirut) ;
  • Saddik, Freddy (Department of Civil and Environmental Engineering, American University of Beirut)
  • Received : 2015.10.09
  • Accepted : 2016.02.17
  • Published : 2016.04.25
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Abstract

This paper investigates the seismic behavior of reinforced concrete shear wall buildings with multiple underground stories. A base-case where the buildings are modeled with a fixed condition at ground level is adopted, and then the number of basements is incrementally increased to evaluate changes in performance. Two subsurface site conditions, corresponding to very dense sands and medium dense sands, are used for the analysis. In addition, three ground shaking levels are used in the study. Results of the study indicated that while the common design practice of cropping the structure at the ground surface leads to conservative estimation of the base shear for taller and less rigid structures; it results in unpredicted and nonconservative trends for shorter and stiffer structures.

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References

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