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Design of Landslide Stabilization Using the Strength Reduction Method and LRFD
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2024-03-01
[PDF-1.55 MB]
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Edition:Final Report
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Abstract:Current design methods for landslide stabilization with numerical modeling do not bridge the gap between the strength reduction method (SRM) and load and resistance factor design (LRFD), resulting in designers making assumptions about how LRFD design criteria (which were developed based on limit-equilibrium analyses) translate to design using numerical modeling, a significantly different design approach. It is unclear if these assumptions are representative, resulting in potentially overly conservative or aggressive designs. The purpose of this study is to evaluate the relationship between strength reduction factors used in the numerical analyses and slope stability factors of safety used for different limit states in the LRFD approach. In addition, the study evaluates the relationship between design parameters for stabilizing structural elements (namely shears, bending moments and deflections) as determined by the two approaches and provides preliminary recommendations on load factors to be applied to the SRM-determined shears and moments to obtain equivalent values as determined by LRFD.
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