Nonlinear analytical modeling and system verification of a wine barrel on a portable steel rack subject to seismic excitation

C. B. Chadwell, J. M. Stanley, J. Marrow

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Nearly 90% of California's $45 billion wine industry operates in high seismic regions, with nearly $15 billion in wine stored in oak barrels stacked on portable steel racks. Recent laboratory studies and historic earthquake performance of this storage system indicate a need to better understand and analytically model the dynamic behavior of rocking to serve as a basis for earthquake hazard mitigation. This paper illustrates a theoretical framework and simulation model which can be used to investigate the dynamic behavior and expected performance of highly nonlinear models of stacked rigid bodies. The authors performed shake table tests with extensive data acquisition on full scale wine barrel stacks in the Parsons Earthquake Engineering Laboratory at Cal Poly, San Luis Obispo. An analytical model was developed and calibrated with the test data using transcendental pulse ground motions of varying frequency. Key features of the analytical model include nonlinear material and geometric springs for rigid body rocking and coupled Coulomb friction models for relative sliding. Presented herein are observations and conclusions based on numerical and physical simulations of full scale barrel stack configurations subjected design level earthquake ground motions. The paper develops a framework that can be used to better estimate the behavior of highly nonlinear, combined rocking and sliding systems. More directly, it is a step in the direction to provide an assessment tool to analytically approximate losses in the wine industry due to regional earthquakes.

Original languageEnglish (US)
Title of host publication8th US National Conference on Earthquake Engineering 2006
Pages9147-9156
Number of pages10
StatePublished - 2006
Externally publishedYes
Event8th US National Conference on Earthquake Engineering 2006 - San Francisco, CA, United States
Duration: Apr 18 2006Apr 22 2006

Publication series

Name8th US National Conference on Earthquake Engineering 2006
Volume15

Conference

Conference8th US National Conference on Earthquake Engineering 2006
Country/TerritoryUnited States
CitySan Francisco, CA
Period4/18/064/22/06

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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