Shear Modulus and Damping Ratio Model for Cement Treated Clay
Publication: International Journal of Geomechanics
Volume 19, Issue 7
Abstract
A hyperbolic model-based normalized shear modulus reduction (G/Gmax) formulation for cement treated clay is presented. This three-parameter normalized shear modulus reduction model can be constructed using maximum shear modulus and isotropic compression experiments. The model assumes that cemented clay follows the failure pattern of a modified structured Cam-clay model. The effects of cement content and confining pressures on G/Gmax are modeled and validated with experimental results from resonant column and cyclic triaxial testing. In addition, the damping ratio is calculated based on the Masing rule; however, for cement treated clays, this rule overestimates the damping ratio at all ranges of shear strain. In this study, correction factors are established to propose a reliable damping ratio model. The newly proposed G/Gmax and damping formulations provide reasonable estimates that match well with the experimental results. These formulations can be used in the seismic response analysis of cement treated ground.
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Published In
International Journal of Geomechanics
Volume 19 • Issue 7 • July 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Aug 3, 2018
Accepted: Jan 8, 2019
Published online: Apr 16, 2019
Published in print: Jul 1, 2019
Discussion open until: Sep 16, 2019
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