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Measured and Predicted Dynamic Vertical Response of an Embedded Footing at TAMU NGES Site
A square and embedded shallow foundation was dynamically loaded via the T-Rex dynamic loading device. The measured responses of the footing indicated that a rigid body motion model for movement of the footing was appropriate. This rigid body model based upon a single-degree-of-freedom (SDOF), mass-spring-dashpot concept, employing a dynamic impedance function computed via a cone model, and using free-field shear wave velocity values measured at the site with surface wave tests, provided a good assessment of the dynamic response of the foundation under vertical excitation. Shear wave velocity values determined using an inversion process that best-fit matched the measured and predicted dynamic vertical displacements of the foundation revealed two interesting patterns relevant to the design of foundations for dynamic load: an effective softening of the soil/foundation contact throughout the footing embedment and a stiffening of the soil below the bottom of the footing.
Measured and Predicted Dynamic Vertical Response of an Embedded Footing at TAMU NGES Site
A square and embedded shallow foundation was dynamically loaded via the T-Rex dynamic loading device. The measured responses of the footing indicated that a rigid body motion model for movement of the footing was appropriate. This rigid body model based upon a single-degree-of-freedom (SDOF), mass-spring-dashpot concept, employing a dynamic impedance function computed via a cone model, and using free-field shear wave velocity values measured at the site with surface wave tests, provided a good assessment of the dynamic response of the foundation under vertical excitation. Shear wave velocity values determined using an inversion process that best-fit matched the measured and predicted dynamic vertical displacements of the foundation revealed two interesting patterns relevant to the design of foundations for dynamic load: an effective softening of the soil/foundation contact throughout the footing embedment and a stiffening of the soil below the bottom of the footing.
Measured and Predicted Dynamic Vertical Response of an Embedded Footing at TAMU NGES Site
Dunn, Patrick W. (author) / Hiltunen, Dennis R. (author)
IFCEE 2018 ; 2018 ; Orlando, Florida
IFCEE 2018 ; 453-462
2018-06-06
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2019
Measured and Predicted Dynamic Vertical Response of an Embedded Footing at TAMU NGES Site
| British Library Conference Proceedings | 2018
| British Library Conference Proceedings | 2011