Axial shortening in reinforced concrete members using vibration characteristics - Part 1 - Theory

Moragaspitiya, Praveen, Thambiratnam, David, Perera, Nimal, & Chan, Tommy H.T. (2009) Axial shortening in reinforced concrete members using vibration characteristics - Part 1 - Theory. In Surawski, Nicholas C. & Wiliem, Arnold (Eds.) Proceedings for the 3rd Smart Systems Postgraduate Student Conference, Queensland University of Technology, Queensland University of Technology, Brisbane, pp. 126-131.


Differential axial shortening in vertical members of reinforced concrete high-rise buildings occurs due to shrinkage, creep and elastic shortening, which are time dependent effects of concrete. This has to be quantified in order to make adequate provisions and mitigate its adverse effects. This paper presents a novel procedure for quantifying the axial shortening of vertical members using the variations in vibration characteristics of the structure, in lieu of using gauges which can pose problems in use during and after the construction. This procedure is based on the changes in the modal flexiblity matrix which is expressed as a function of the mode shapes and the reciprocal of the natural frequencies. This paper will present the development of this novel procedure.

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ID Code: 32993
Item Type: Conference Paper
Refereed: Yes
Additional Information: The part 2 of this paper can accessed via the Additional URLs
Additional URLs:
Keywords: Vibration Characteristics, High-rise Buildings, Axial Shortening, Modal Flexibility Matrix, Time Dependent Effects, Concrete
ISBN: 9780980582727
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Past > Schools > School of Urban Development
Copyright Owner: Copyright 2009 Queensland University of Technology
Deposited On: 01 Jul 2010 23:01
Last Modified: 01 Jul 2010 23:08

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