Effects of Liquefaction on Inelastic Demands on Extended Pile Shafts

Authors

Arash Khosravifar, Portland State UniversityFollow
Ross W. Boulanger, University of California, Davis
Sashi K. Kunnath, University of California, Davis

Published In

Earthquake Spectra

Document Type

Citation

Publication Date

11-2014

Abstract

Inelastic response of extended pile shafts subjected to liquefaction-induced lateral spreading is investigated using nonlinear dynamic analyses (NDA) covering a range of soil, pile and ground motion conditions. Each soil-structure scenario was analyzed for three cases: a baseline case with soil liquefaction and superstructure inertia; a case with liquefaction, but without superstructure inertia (i.e., superstructure mass removed); and a case without liquefaction (i.e., pore pressure generation eliminated), but with superstructure inertia. Results show that the combined effects of lateral spreading and superstructure inertia produce larger demands (often by more than 50%) than are produced by either loading case alone, such that the combined demand cannot be enveloped by analyzing the two load cases separately. The results of these parametric analyses provide a database that is used in subsequent development of an equivalent static analysis (ESA) design procedure.

Description

*At the time of publication Arash Khosravifar was affiliated with Fugro Consultants Inc.

Locate the Document

https://doi.org/10.1193/032412EQS105M

DOI

10.1193/032412EQS105M

Persistent Identifier

https://archives.pdx.edu/ds/psu/26637

Citation Details

Arash Khosravifar, Ross W. Boulanger, and Sashi K. Kunnath (2014) Effects of Liquefaction on Inelastic Demands on Extended Pile Shafts. Earthquake Spectra: November 2014, Vol. 30, No. 4, pp. 1749-1773.