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yet more buckled wine tanks

Yet more buckled tanks at Wente Brothers. These buckling patterns are caused by a combination of axial compression from the overturning moment generated by the horizontal component of the earthquake, axisymmetric hoop tension generated by the hydrostatic internal pressure from the stored wine, and in-plane shear generated by the earthquake motion. The maximum in-plane shear occurs 90 degrees around the circumference from the maximum axial compression. (Photograph by J. Skogh)

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