Component Testing of Pressurized Sand Dampers to Assess the Effect of Design Parameters
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Bibliographic Details
| Author(s): |
Konstantinos N. Kalfas
(The University of Texas at Tyler, Dept. of Civil Engineering, Tyler, TX, USA)
Nicos Makris (Southern Methodist University, Dept. of Civil and Environmental Engineering, Dallas, TX, USA) |
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| Medium: | conference paper | ||||
| Language(s): | English | ||||
| Conference: | IABSE Congress: Beyond Structural Engineering in a Changing World, San José, Cost Rica, 25-27 Seotember 2024 | ||||
| Published in: | IABSE Congress San José 2024 | ||||
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| Page(s): | 1282-1289 | ||||
| Total no. of pages: | 8 | ||||
| DOI: | 10.2749/sanjose.2024.1282 | ||||
| Abstract: |
This study presents results from cyclic testing on various configurations of a recently developed pressurized sand damper (PSD) in which a steel sphere is moving within a cylindrical tube filled with sand that is under pressure. The experimental campaign investigated the effects of the key design parameters of the damper, namely, the effect of the clearance between the moving sphere and the cylindrical tube and the effect of the overall length of the damper to its force output. Component testing at various geometric configurations, pressure levels, stroke amplitudes, and cycling frequencies show that the proposed pressurized sand damper exhibits stable hysteretic cyclic behaviour with increasing pinching at larger strokes. The recorded force–displacement loops when normalized to the strength of the pressurized sand damper confirm that the force output is nearly rate-independent. |
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| Keywords: |
hysteretic behavior energy dissipation pressurized sand damper response- modification devices granular materials
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