COLLAPSE MECHANISM OF STEEL PILES IN LIQUEFIED SOIL BASED ON CENTRIFUGAL TESTS OF SUPERSTRUCTURE-PILE FOUNDATION AND LIQUEFIED SOIL SYSTEM WITH HIGH HEIGHT-TO-WIDTH ASPECT RATIO OF BUILDING
Yoshihiro Kimura, Moeko MATOBA, 修次 田村
2021Journal of Structural and Construction Engineering (Transactions of AIJ)11 citationsDOIOpen Access PDF
Abstract
Steel piles below high-rise buildings may carry larger varying axial force generated by the overturning moment than those below low- or medium-rise buildings. On top of that, the subgrade lateral stiffness reduces drastically due to the soil liquefaction during a significant earthquake. Steel pile’s horizontal strength may decrease due to the lower position of the inflection point. In this paper, centrifugal tests of the superstructure with high height-to-width aspect ratio, steel piles, and the liquefied soil system are presented. The collapse mechanism and the horizontal load bearing capacity of steel piles in the liquefied soil are clarified.
Topics & Concepts
Geotechnical engineeringPileFoundation (evidence)StiffnessBearing capacityCentrifugeSuperstructureLiquefactionBearing (navigation)Deformation (meteorology)Structural engineeringFailure mechanismBending momentInflection pointEngineeringGeologyMaterials scienceComposite materialCartographyPhysicsHistoryMathematicsNuclear physicsGeographyArchaeologyGeometryGeotechnical Engineering and Soil StabilizationGeotechnical Engineering and Soil MechanicsGeotechnical Engineering and Underground Structures