1. Seismic Vulnerability of a Slender Stalagmite.
- Author
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Zembaty, Z., Bońkowski, P.A., Jaworski, M.A., and Gribovszki, K.
- Subjects
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BENDING moment , *SEISMIC response , *STALACTITES & stalagmites , *FREE vibration , *SPELEOTHEMS - Abstract
Seismic vulnerability of speleothems may serve long-term seismic risk studies. For this reason, the seismic response of stalagmite is computed using a robust FEM model calibrated from free vibration records by Hilbert–Huang modal extraction. It is demonstrated that the stalagmite vibrations consist of pairs of closely coupled flexural natural modes with a negligible role of vertical excitations. The location of the breaking point of the stalagmite is a result of a balance between the overturning bending moment and variations of horizontal cross-sections with height. Safety margins are investigated, and the ultimate peak velocity of excitations equaling 3.4 mm/s is estimated. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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