Geomechanics and Engineering

Techno-Press (테크노프레스)
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Passive p-y curves for rigid basement walls supporting granular soils

  • Imad, Elchiti (Department of Civil and Environmental Engineering, American University of Beirut) ;
  • George, Saad (Department of Civil and Environmental Engineering, American University of Beirut) ;
  • Shadi S., Najjar (Department of Civil and Environmental Engineering, American University of Beirut)
  • Received : 2020.07.22
  • Accepted : 2023.01.18
  • Published : 2023.02.10
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Abstract

For structures with underground basement walls, the soil-structure-interaction between the side soil and the walls affects the response of the system. There is interest in quantifying the relationship between the lateral earth pressure and the wall displacement using p-y curves. To date, passive p-y curves in available limited studies were assumed elastic-perfectly plastic. In reality, the relationship between earth pressure and wall displacement is complex. This paper focuses on studying the development of passive p-y curves behind rigid walls supporting granular soils. The study aims at identifying the different components of the passive p-y relationship and proposing a rigorous non-linear p-y model in place of simplified elastic-plastic models. The results of the study show that (1) the p-y relationship that models the stress-displacement response behind a rigid basement wall is highly non-linear, (2) passive p-y curves are affected by the height of the wall, relative density, and depth below the ground surface, and (3) passive p-y curves can be expressed using a truncated hyperbolic model that is defined by a limit state passive pressure that is determined using available logarithmic spiral methods and an initial slope that is expressed using a depth-dependent soil stiffness model.

Keywords

Acknowledgement

The authors would like to acknowledge the support of the University Research Board (URB) at the American University of Beirut for funding this work.

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