Innovative modeling of tuned liquid column damper controlled structures

Alberto Di Matteo , Mario Di Paola , Antonina Pirrotta

Abstract

In this paper a different formulation for the response of structural systems controlled by Tuned Liquid Column Damper (TLCD) devices is developed, based on the mathematical tool of fractional calculus. Although the increasing use of these devices for structural vibration control, it has been demonstrated that existing model may lead to inaccurate prediction of liquid motion, thus reflecting in a possible imprecise description of the structural response. For this reason the recently proposed fractional formulation introduced to model liquid displacements in TLCD devices, is here extended to deal with TLCD controlled structures under base excitations. As demonstrated through an extensive experimental analysis, the proposed model can accurately capture structural responses both in time and in frequency domain. Further, the proposed fractional formulation is linear, hence making identification of the involved parameters extremely easier.

Key Words

tuned liquid column damper; passive control; fractional derivatives; experimental investigation

Address

Alberto Di Matteo and Mario Di Paola — Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali (DICAM), Università degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy
Antonina Pirrotta — Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali (DICAM), Università degli Studi di Palermo, Viale delle Scienze, 90128 Palermo, Italy; Department of Mathematical Sciences, University of Liverpool, Liverpool, Uk

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