How the shear wave velocity uncertainty affects soil-structure interaction on liquefiable soils?
Journal
5th Asia Pacific Meeting on Near Surface Geoscience and Engineering, NSGE 2023
ISBN (of the container)
9789462824577
Date Issued
2023
Author(s)
Wang, J.
Abstract
In practice, the site characterization was often to be identified via a deterministic process, which only relied on limited borings and cone penetration tests (CPTs). The complexities and uncertainties in modelling the subsoil conditions were found to be the key factors that notably affect the post-earthquake ground deformations and structural damage in the field with interlayered and heterogeneous soil deposits. Hence, an integrated geophysical-based (e.g., active or passive seismic method) and mechanical-based (SPT or CPT method) subsoil exploration approach is required to improve the reliability and efficiency in subsoil characterization. A series of 2D random field finite element analyses (RFEA) was performed for seismic interaction of isolated structure on liquefaction soils, as a representative case. The spatial variations in the small-strain shear wave velocity (and hence, maximum soil shear modulus) were considered, while the strength parameters were set as deterministic values. The insight from this study aims to evaluate the influence of soil’s small strain properties on the consequence of soil liquefaction and buildings facing liquefaction hazards, as well as the need to develop an integrated geophysical-based and mechanical-based subsoil exploration approach. © 2023 NSGE. All Rights Reserved.
Event(s)
5th Asia Pacific Meeting on Near Surface Geoscience and Engineering, NSGE 2023, 6 March 2023 through 9 March 2023, Taipei, code 191541
SDGs
Publisher
European Association of Geoscientists and Engineers, EAGE
Type
conference paper