Numerical Modeling of Columnar-Reinforced Ground Behavior During Dynamic Centrifuge Testing

Abstract

Predicting the response of soil profiles during earthquakes is one of the major challenges in geotechnical earthquake engineering. The presence of reinforcing elements such as stiff columns adds further complexity to the problem due to the interaction of these stiff elements with the surrounding ground. This research presents the results of advanced numerical simulations of dynamic centrifuge tests performed on a columnar reinforced model with a loose sandy profile. The model was subjected to earthquake base motions of varying intensities to investigate the reinforcing mechanisms of soil-cement columns. Numerical simulations were performed using the finite element computational platform OpenSees with pressure dependent multi yield (PDMY02) constitutive model. Simulated and measured values were compared for seismic intensity, excess pore water pressure and ground settlement at different locations within soil profile. The calibrated numerical model was able to realistically predict the response of reinforced ground.

Meeting Name

Geotechnical Frontiers 2017 (2017: Mar. 12-15, Orlando, FL)

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Centrifuges; Earthquake Engineering; Earthquakes; Finite Element Method; Geophysics; Reinforcement; Soil Cement; Soils, Centrifuge Testing; Computational Platforms; Excess Pore Water Pressure; Pressure Dependent; Reinforcing Elements; Reinforcing Mechanism; Seismic Intensity; Soil-Cement Column, Numerical Models

International Standard Serial Number (ISSN)

0895-0563

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 American Society of Civil Engineers (ASCE), All rights reserved.

Publication Date

01 Mar 2017

Link to Full Text

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