Title: Identification of equivalent mechanical properties for unreinforced masonry walls

Authors: Christophe Mordant; Hervé Degée; Vincent Denoël

Addresses: National Fund for Scientific Research and Structural and Stochastic Dynamics, University of Liège, B52/3, Quartier Polytech, Liège 4000, Belgique ' Construction Engineering Research Group, Hasselt University, Agoralaan, Building H, Diepenbeek 3590, Belgium ' Structural and Stochastic Dynamics, University of Liége, B52/3, Quartier Polytech, Liége 4000, Belgique

Abstract: Transverse vibrations of beams are an interesting topic for numerous engineering fields. The equations of motion develop under various assumptions and associate a frequency equation. This paper expresses the frequency equation for two specific models, using the Timoshenko beam theory. The first model is a typical cantilever beam with an additional mass attached to the free end. The second model considers a beam partially clamped at the base and with an elastic connection of the additional mass to the free end. The relevance of the used theory is discussed and the importance of each term of the equation is studied. These models find applications in unreinforced masonry. They are indeed fitted to identify, from white noise tests, equivalent mechanical properties of unreinforced load-bearing clay masonry walls including soundproofing devices in the perspective of modelling these elements with a macro-scale approach. Discrepancies with respect to current standards are underscored.

Keywords: earthquake engineering; equivalent properties; frequency equation; Timoshenko beam theory; transverse vibrations; unreinforced masonry.

DOI: 10.1504/IJMRI.2017.10008289

International Journal of Masonry Research and Innovation, 2017 Vol.2 No.4, pp.274 - 299

Received: 07 Sep 2016
Accepted: 18 Mar 2017

Published online: 04 Oct 2017 *

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