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Earthquakes and Structures
  Volume 12, Number 2, February 2017, pages 251-262
DOI: http://dx.doi.org/10.12989/eas.2017.12.2.251
 


Seismic evaluation of soil-foundation-structure interaction: Direct and Cone model
Jahangir Khazaei, Azadeh Amiri and Mehrdad Khalilpour

 
Abstract
    The present research intends to study the effects of the seismic soil-foundation-structure interaction (SFSI) on the dynamic response of various buildings. Two methods including direct and Cone model were studied through 3D finite element method using ABAQUS software. Cone model as an approximate method to consider the SFSI phenomenon was developed and evaluated for both high and low rise buildings. Effect of soil nonlinearity, foundation rigidity and embedment as well as friction coefficient between soil-foundation interfaces during seismic excitation are investigated. Validity and performance of both approaches are evaluated as reference graphs for Cone model and infinite boundary condition, soil nonlinearity and amplification factor for direct method. A series of calculations by DeepSoil for inverse earthquake record modification was conducted. A comparison of the two methods was carried out by root-mean-square-deviation (RMSD) tool for maximum lateral displacement and story shear forces which verifies that Cone model results have good agreement with direct method. It was concluded that Cone method is a convenient, fast and rather accurate method as an approximate way to count for soil media.
 
Key Words
    soil-foundation-structure interaction; finite element method; Cone model; seismic excitation; infinite boundary condition
 
Address
Faculty of Engineering and Technology, Razi University, Kermanshah, Iran
 

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