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Nonlinear Material Models for Winkler-Based Shallow Foundation Response Evaluation
When a foundation is subjected to earthquake ground motions, its sliding, settling and rocking movements can provide a mechanism for dissipating energy at the soil-structure interface and thus reduce the force demand to the structure. One potential approach to capturing this behavior involves modeling the foundation subgrade as a Beam-on-Nonlinear-Winkler-Foundation (BNWF) with a system of discrete, mechanistic, uncoupled springs having nonlinear inelastic behavioral response. This type of model is useful in engineering practice, due to its simplicity and ease of implementation in a general purpose finite element platform. However, the nonlinear backbone curves for spring interface elements have only been evaluated against lateral pile load test data. In this study, nonlinear inelastic springs for use in capturing shallow footing response under seismic loading are calibrated against centrifuge and field tests. The effects of the updated backbone curves is demonstrated on a model footing subjected to reversed cyclic rotation.
Nonlinear Material Models for Winkler-Based Shallow Foundation Response Evaluation
When a foundation is subjected to earthquake ground motions, its sliding, settling and rocking movements can provide a mechanism for dissipating energy at the soil-structure interface and thus reduce the force demand to the structure. One potential approach to capturing this behavior involves modeling the foundation subgrade as a Beam-on-Nonlinear-Winkler-Foundation (BNWF) with a system of discrete, mechanistic, uncoupled springs having nonlinear inelastic behavioral response. This type of model is useful in engineering practice, due to its simplicity and ease of implementation in a general purpose finite element platform. However, the nonlinear backbone curves for spring interface elements have only been evaluated against lateral pile load test data. In this study, nonlinear inelastic springs for use in capturing shallow footing response under seismic loading are calibrated against centrifuge and field tests. The effects of the updated backbone curves is demonstrated on a model footing subjected to reversed cyclic rotation.
Nonlinear Material Models for Winkler-Based Shallow Foundation Response Evaluation
Raychowdhury, Prishati (author) / Hutchinson, Tara (author)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 686-693
2008-03-07
Conference paper
Electronic Resource
English
Nonlinear Material Models for Winkler-Based Shallow Foundation Response Evaluation
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