Abstract
This paper is concerned with the problem of identifying the tensile axial force of metallic tie-rods used in civil structures. Tie-rods are generally used to transfer a tensile force between different structural elements. Specifically in civil structures, they are often used to unburden the lateral load exercised by the vaults and arcs on walls or columns, in ancient monumental masonry buildings as well as in modern concrete/iron constructions. A direct measure of this force is impossible and the tension is an unknown variable, as are the boundary conditions expressed by the constraints. Thus, in such a scenario, the characteristic equation has no analytical solutions. The paper proposes an experimental technique developed to identify, in situ, the tensile force on the rod. The identification method uses the first modal frequencies of the structure, identified by measuring the frequency response functions (FRFs) with instrumented hammer excitation. The frequencies are used to characterize some correlation indexes that change according to the variation in the tensile axial force of the rod. An FEM code numerical model allows to identify where the change in correlation indexes along the tie-rod could be greatest, in order to arrange a suitable measurement set up. Then the numerical model provides an evaluation of the tensile force corresponding to the set of correlation indexes identified. An estimation of the error in the identification of the force is given by a reasonable interval of stiffness of the constraints. The technique has been tested on laboratory system.
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References
Briccoli Bati S, Tonietti U (2001) Experimental method for estimating in situ tensile force in tie-rods. J Eng Mech 127:1275–1283
Tullini N, Laudiero F (2008) Dynamic identification of beam axial loads using one flexural mode shape. J Sound Vib 318:131–147
Lagomarsino S, Calderini C (2005) The dynamical identification of the tensile force in ancient tie-rods. Eng Struct 27:846–856
Blasi C, Sorace S (1994) Determining the axial force in mettallic rods. Struct Eng Int (IABSE) 4:241–246
Garziera R, Amabili M, Collini L (2011) A hybrid method for nonsestructive evaluation of the axial load in structural tie-rods. Nondestr Test Eval 26:197–208
Ewins DE (2000) Modal testing - theory, practice and application. Research Studies Press Ltd, Philadelphia
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© 2014 The Society for Experimental Mechanics, Inc.
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Manzoni, S., Scaccabarozzi, M., Vanali, M. (2014). Identification of Tie-Rods Tensile Axial Force in Civil Structures. In: Wicks, A. (eds) Structural Health Monitoring, Volume 5. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-04570-2_7
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DOI: https://doi.org/10.1007/978-3-319-04570-2_7
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Publisher Name: Springer, Cham
Print ISBN: 978-3-319-04569-6
Online ISBN: 978-3-319-04570-2
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