TY - GEN
T1 - Nonlinear analytical modeling and system verification of a wine barrel on a portable steel rack subject to seismic excitation
AU - Chadwell, C. B.
AU - Stanley, J. M.
AU - Marrow, J.
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:77956422131
SN - 9781615670444
T3 - 8th US National Conference on Earthquake Engineering 2006
SP - 9147
EP - 9156
BT - 8th US National Conference on Earthquake Engineering 2006
T2 - 8th US National Conference on Earthquake Engineering 2006
Y2 - 18 April 2006 through 22 April 2006
ER -