Liquefaction and Cyclic Softening at Balboa Boulevard during the 1994 Northridge Earthquake
نویسندگان
چکیده
The seismic performance of Balboa Boulevard during the 1994 MW 6.7 Northridge earthquake was examined through nonlinear deformation analyses (NDAs) using advanced tools to (1) investigate failure mechanism leading ground deformations at this site; (2) evaluate accuracy adopted analysis methods, engineering procedures, and state-of-the-art reasonably estimate horizontal displacements; (3) identify key factors parameters contributing earthquake-induced site. One-dimensional (1D) liquefaction vulnerability indexes (LVIs) permanent displacements Newmark sliding block were also estimated compared against observed after earthquake. geotechnical characterization assessed based on field laboratory data obtained from two investigation campaigns. Transitional probability geostatistics used develop stratigraphic models that capture heterogeneity spatial variability patterns sand-like clay-like soils present implemented in finite difference software FLAC behavior simulated PM4Sand PM4Silt constitutive models, respectively. Sensitivity performed address uncertainties associated with soils, input motions, proportion within soil deposit, strength properties these materials. Results NDAs suggest a compounded effect both cyclic softening led excessive Boulevard. This study sheds light importance appropriate procedures numerical modeling protocols prediction patterns, selection parameters, as well applicability LVIs complex sites.
منابع مشابه
State of stress before and after the 1994 Northridge Earthquake
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ژورنال
عنوان ژورنال: Journal of Geotechnical and Geoenvironmental Engineering
سال: 2021
ISSN: ['1943-5606', '1090-0241']
DOI: https://doi.org/10.1061/(asce)gt.1943-5606.0002417