Damping in a Timber Column

An Energy-Based Approach

Master thesis (2023)

Authors

E.R. van der Stap Civil Engineering & Geosciences

Contributors

A. Metrikine Engineering Structures (supervisor 1)
S. Sánchez Gómez Dynamics of Structures - CEG (supervisor 1)
G.J.P. Ravenshorst Bio-based Structures & Materials - CEG (supervisor 1)
R. Verhaegh (supervisor 1)
Faculty
Civil Engineering & Geosciences
Copyright: © 2023 Eduard van der Stap
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Published Date

26-04-2023

Language

English

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Faculty

Civil Engineering & Geosciences

Abstract

An analytical study of an energy-based approach to damping of a clamped timber column in free vibration under axial, lateral and torsional loading conditions was conducted. Backed by experiments it was confirmed that an energy-based approach, as proposed by Sánchez Gómez (2018), could describe the energy dissipation in a laterally vibrating timber column. With the help of an energy balance equation, the energy flow in a timber column was formulated including any energy dissipated during vibration. It was found that the energy in the system could be approximated by an exponential function for which a new dissipation constant ED (s-1) was introduced. For lateral vibrating columns of Norway spruce, typical values of ED were 0.4 - 0.6 s-1. Furthermore, a case study on a timber high-rise building demonstrated
that damping has a significant influence on reducing peak accelerations which, in turn, could potentially lead to lowered costs. This largely untapped design lever warrants significant research and design improvement for these timber high-rise structures and, hence, several recommendations for follow-up research are offered.