Work

SPH Implementation of a Dynamic Hypoplastic Model for Seismic Large Deformation Analysis in Slopes

Year: 2025

Type: article

Abstract: ABSTRACT Accurate modeling of soil behavior under seismic conditions is critical for understanding and mitigating earthquake‐induced hazards. In this study, the Dyna–Simhypo model, an enhanced hypoplastic framework incorporating the intergranular strain tensor, is integrated with smoothed particle hydrodynamics (SPH) method for the first time to simulate co‐seismic large deformation processes of slopes. The model's performance is validated through cyclic triaxial tests, seismic wave propagation analysis, and large‐scale seismic slope simulations. Compared to the original Simhypo model, it eliminates ratcheting and reliably captures shear modulus reduction, damping buildup, and progressive soil degradation under cyclic loading. These advancements enable precise site response evaluations and accurate slope instability predictions, offering a robust tool for seismic hazard assessment.

Source: International Journal for Numerical and Analytical Methods in Geomechanics

DOI: 10.1002/nag.3984

Authors: Hong‐jie Fang, Shun Wang, Xuan Kang, Dian‐qing Li, Wei Wu, Barbara Świtała

Institutions: Wuhan University, BOKU University, Institute of Hydroengineering, Polish Academy of Sciences

Language: English

Topic: Fluid Dynamics Simulations and Interactions

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: National Natural Science Foundation of China, Austrian Science Fund

Awards: G2193907117, G63802182, Creep failure of landslides in partially saturated soil, Investigation on soil-rock interface in bedding landslides