Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

The lateral load resistance of pile foundations is critically important to the design of structures that may be subjected to earthquakes. This paper presents computational modeling results of the response of a large pile group system under lateral load. The open-source platform OpenSees is employed to conduct a nonlinear 3-dimensional finite element analysis. The piles are modeled by beam-column elements, and rigid beam-column elements are used to model the pile size (diameter). In order to facilitate the pre- and post-processing phases, a recently developed user interface OpenSeesPL is employed. Distribution of load within the pile group is presented and the group interaction effects are discussed. Under lateral loading, corner piles shoulder the greatest burden in resisting the resulting shear, bending, and axial loads. Lower compressive or even tensile axial forces in the back piles may greatly weaken/deteriorate the structural reinforced concrete properties. Further validation and calibration of the analysis framework may be conducted with the aid of case histories and experimental data.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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May 24th, 12:00 AM May 29th, 12:00 AM

Computational Modeling of a Large Pile Group Under Lateral Load

San Diego, California

The lateral load resistance of pile foundations is critically important to the design of structures that may be subjected to earthquakes. This paper presents computational modeling results of the response of a large pile group system under lateral load. The open-source platform OpenSees is employed to conduct a nonlinear 3-dimensional finite element analysis. The piles are modeled by beam-column elements, and rigid beam-column elements are used to model the pile size (diameter). In order to facilitate the pre- and post-processing phases, a recently developed user interface OpenSeesPL is employed. Distribution of load within the pile group is presented and the group interaction effects are discussed. Under lateral loading, corner piles shoulder the greatest burden in resisting the resulting shear, bending, and axial loads. Lower compressive or even tensile axial forces in the back piles may greatly weaken/deteriorate the structural reinforced concrete properties. Further validation and calibration of the analysis framework may be conducted with the aid of case histories and experimental data.