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    Probabilistic evaluation of soil-foundation-structure interaction effects on seismic structural response (2011)

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    Type of Content
    Journal Article
    UC Permalink
    http://hdl.handle.net/10092/6392
    
    Publisher's DOI/URI
    https://doi.org/10.1002/eqe.1011
    
    Publisher
    University of Canterbury. Civil and Natural Resources Engineering
    University of Canterbury. Mechanical Engineering
    Collections
    • Engineering: Journal Articles [1527]
    Authors
    Moghaddasi, M.
    Cubrinovski, M.
    Chase, Geoff cc
    Pampanin, Stefano cc
    Carr, A.
    show all
    Abstract

    Complex seismic behaviour of soil-foundation-structure (SFS) systems together with uncertainties in system parameters and variability in earthquake ground motions result in a significant debate over the effects of soil-foundation-structure interaction (SFSI) on structural response. The aim of this study is to evaluate the influence of foundation flexibility on the structural seismic response by considering the variability in the system and uncertainties in the ground motion characteristics through comprehensive numerical simulations. An established rheological soil-shallow foundation-structure model with equivalent linear soil behaviour and nonlinear behaviour of the superstructure has been used. A large number of models incorporating wide range of soil, foundation and structural parameters were generated using a robust Monte-Carlo simulation. In total, 4.08 million time-history analyses were performed over the adopted models using an ensemble of 40 earthquake ground motions as seismic input. The results of the analyses are used to rigorously quantify the effects of foundation flexibility on the structural distortion and total displacement of the superstructure through comparisons between the responses of SFS models and corresponding fixed-base (FB) models. The effects of predominant period of the FB system, linear vs nonlinear modelling of the superstructure, type of nonlinear model used and key system parameters are quantified in terms of different probability levels for SFSI effects to cause an increase in the structural response and the level of amplification of the response in such cases. The results clearly illustrate the risk of underestimating the structural response associated with simplified approaches in which SFSI and nonlinear effects are ignored

    Citation
    Moghaddasi, M., Cubrinovski, M., Chase, G.J., Pampanin, S., Carr, A. (2011) Probabilistic evaluation of soil-foundation-structure interaction effects on seismic structural response. Earthquake Engineering and Structural Dynamics, 40(2), pp. 135-154.
    This citation is automatically generated and may be unreliable. Use as a guide only.
    Keywords
    soil-foundation-structure interaction; Monte Carlo simulatiom; earthquake ground motion; nonlinear behaviour; probability
    ANZSRC Fields of Research
    40 - Engineering::4005 - Civil engineering::400506 - Earthquake engineering
    05 - Environmental Sciences::0503 - Soil Sciences::050305 - Soil Physics
    40 - Engineering::4005 - Civil engineering::400510 - Structural engineering
    Rights
    https://hdl.handle.net/10092/17651

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    • Effects of soil-foundation-structure interaction on seismic structural response via robust Monte Carlo simulation 

      Moghaddasi, M.; Cubrinovski, M.; Chase, Geoff; Pampanin, Stefano; Carr, A. (University of Canterbury. Civil and Natural Resources EngineeringUniversity of Canterbury. Mechanical Engineering, 2011)
      Uncertainties involved in the characterization and seismic response of soil-foundation-structure systems along with the inherent randomness of the earthquake ground motion result in very complex (and often controversial) ...
    • Soil-Foundation-Structure Interaction Effects on Nonlinear Seismic Demand of Structures 

      Moghaddasi, M.; Cubrinovski, M.; Pampanin, Stefano; Carr, A.J.; Chase, Geoff (University of Canterbury. Civil and Natural Resources EngineeringUniversity of Canterbury. Mechanical Engineering, 2010)
      Investigating the seismic demand of structures integrating soil-foundation-structure interaction (SFSI) effects is a demanding task as a result of the complexity of the coupled dynamic problem. It is also augmented by the ...
    • Sensitivity analysis for soil-structure interaction phenomenon using stochastic approach 

      Moghaddasi, M.; Chase, Geoff; Cubrinovski, M.; Pampanin, Stefano; Carr, A. (University of Canterbury. Civil and Natural Resources EngineeringUniversity of Canterbury. Mechanical Engineering, 2012)
      A significant contribution to the seismic design procedure including soil-structure interaction (SSI) is a complete understanding of the scenarios causing detrimental SSI effects. In that regard, this paper analyses several ...
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