Experimental modal analysis of reinforced concrete square slabs

Ahmed, M.S. and Mohammad, F.A. ORCID: 0000-0001-6955-4261, 2015. Experimental modal analysis of reinforced concrete square slabs. International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering, 9 (3).

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Abstract

The aim of this paper is to perform experimental modal analysis (EMA) of reinforced concrete (RC) square slabs. EMA is the process of determining the modal parameters (Natural Frequencies, damping factors, modal vectors) of a structure from a set of frequency response functions FRFs (curve fitting). Although, experimental modal analysis (or modal testing) has grown steadily in popularity since the advent of the digital FFT spectrum analyzer in the early 1970’s, studying all types of members and materials using such method have not yet been well documented. Therefore, in this work, experimental tests were conducted on RC square slab specimens of dimensions 600mm x 600mmx 40mm. Experimental analysis was based on freely supported boundary condition. Moreover, impact testing as a fast and economical means of finding the modes of vibration of a structure was used during the experiments. In addition, Pico Scope 6 device and MATLAB software were used to acquire data, analyze and plot Frequency Response Function (FRF). The experimental natural frequencies which were extracted from measurements exhibit good agreement with analytical predictions. It is showed that EMA method can be usefully employed to investigate the dynamic behavior of RC slabs.

Item Type: Journal article
Publication Title: International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering
Creators: Ahmed, M.S. and Mohammad, F.A.
Date: 2015
Volume: 9
Number: 3
Divisions: Schools > School of Architecture, Design and the Built Environment
Depositing User: Jonathan Gallacher
Date Added: 26 Feb 2016 07:59
Last Modified: 09 Jun 2017 13:59
URI: http://irep.ntu.ac.uk/id/eprint/27042

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