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Effects of Inclination of Longitudinal and Vertical Acceleration Components of Near-Field Earthquake Records on Seismic Responses of Pile Foundation-Superstructure Systems in Liquefiable Soil Bed.
- Source :
-
Journal of Earthquake & Tsunami . Jun2024, Vol. 18 Issue 3, p1-18. 18p. - Publication Year :
- 2024
-
Abstract
- The inclination angle of such components with respect to the principal orthogonal axes cannot be neglected in the direct seismic analysis of soil-foundation-superstructure systems, specifically in a piled liquefiable soil bed. This study validated numerical simulations and numerically modeled a concrete moment frame on a pile foundation within a liquefiable soil bed. The direct seismic analysis of the superstructure-foundation-soil system was carried out in a single step (through nonlinear dynamic time-history analysis) under longitudinal and vertical near-field seismic acceleration component records. The effects of the inclination of longitudinal and vertical acceleration components on the seismic responses of the soil-foundation-superstructure system in the liquefiable soil bed were explored, evaluating the critical inclination based on the near-field earthquake magnitude. It was observed that the simultaneous application of longitudinal and vertical near-field seismic acceleration components substantially changed the liquefiable soil bed drift of the pile foundation-superstructure system, significantly altering r u in depth, particularly in the middle of the pile depth. The change in r u and its effects on the seismic responses of the superstructure and piles (interstory drift and pile shear force and bending moment) were different upon a 30° change (rotation) in the acceleration records from 0 to 90° with respect to the orthogonal principal axes. [ABSTRACT FROM AUTHOR]
- Subjects :
- *SEISMIC response
*SEISMOGRAMS
*BUILDING foundations
*BENDING moment
*SHEARING force
Subjects
Details
- Language :
- English
- ISSN :
- 17934311
- Volume :
- 18
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Earthquake & Tsunami
- Publication Type :
- Academic Journal
- Accession number :
- 177608731
- Full Text :
- https://doi.org/10.1142/S1793431123500422