Advanced modeling of nonlinear soil-structure interaction using the clay hypoplasticity constitutive model
Year: 2025
Type: article
Abstract: Soil-structure interaction (SSI) is a crucial factor in the design and analysis of building structures, particularly when they are founded on soft soil deposits. Traditional equivalent linear and simplified nonlinear models often fail to capture the full complexity of nonlinear soil behaviour during SSI simulations. As a result, they can produce inaccurate predictions of structural responses under strong ground shaking. This study addresses this challenge by developing a fully coupled, three-dimensional nonlinear finite element framework for SSI analysis. The standout feature of this work is the integration of the advanced Clay Hypoplasticity constitutive model into the framework of the numerical model, which offers a significant improvement over the conventional models. This advanced model allows for precise representation of fine-grained soil behaviour, including critical aspects such as small-strain behaviour, large deformations, and stiffness degradation during seismic events. The modelling framework incorporates detailed definitions of structural elements, soil elements, boundary conditions, contact interfaces, and dynamic loading. Validation of the model is also conducted through comparisons with experimental shaking table tests, and the results show a remarkable agreement with the experimental measurements. The validated framework is then applied to a seven-storey reinforced concrete frame on soft soil to evaluate SSI effects. The results show pronounced ground-motion amplification, period elongation, and significant changes in displacement, drift, force demand, and settlement compared with a fixed-base model.
Source: Results in Engineering
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,940
OpenAlex ID: W4415716751