000013189 001__ 13189
000013189 005__ 20161114160331.0
000013189 04107 $$aeng
000013189 046__ $$k2009-06-22
000013189 100__ $$aZellhofer, M.
000013189 24500 $$aDesign of piezoelectric sensor networks for structural monitoring of frame structures

000013189 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013189 260__ $$bNational Technical University of Athens, 2009
000013189 506__ $$arestricted
000013189 520__ $$2eng$$aIn the present paper we study the design of sensor networks for structural monitoring of multi-storey frame structures. We consider each storey of the frame structure to be composed by two flexible sidewalls and one rigid floor. The sensor network is implemented by attaching to the sidewalls piezoelectric patch sensors. The goal is to place the individual patches of the sensor network and to assign weights to them, such that the combined output of the sensor network is a desired structural entity of the frame structure; e.g. the displacement of a specific floor. In the first part we model the flexible sidewalls as Bernoulli-Euler beams and we show that using spatially distributed piezoelectric sensors rather than patch sensors a distribution of the piezoelectric sensors can be easily calculated, which results in the exact measurement of the desired kinematical entity. Based on this exact solution the weights for the sensor network are computed: The piezoelectric patches are placed and weights are assigned based on a static analysis of the structure, in which additional degrees of freedom resulting from the redundancy of the structure are taken into account to optimize the performance of the sensor system. In the second part the analytical solutions are compared to electromechanically coupled three-dimensional Finite Element computations; on the one hand to identify piezoelectric coefficients and permittivities for the analytical model to match the sensing behavior of the Finite Element model, and on the other hand to validate the analytical solution for the sensor network design. The identification of the two material parameters is performed statically for the case of short-circuited electrodes (measuring the electric charge) as well as open electrodes (measuring the voltage). A very good agreement between analytical and numerical results is found.

000013189 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013189 653__ $$aMulti-storey frame structures, structural monitoring, piezoelectric sensors, sensor networks Abstract. In the present paper we study the design of sensor networks for structural monitoring of multi-storey frame structures. We consider each storey of the frame structure to be composed by two flexible sidewalls and one rigid floor. The sensor network is implemented by attaching to the sidewalls piezoelectric patch sensors. The goal is to place the individual patches of the sensor network and to assign weights to them, such that the combined output of the sensor network is a desired structural entity of the frame structure; e.g. the displacement of a specific floor. In the first part we model the flexible sidewalls as Bernoulli-Euler beams and we show that using spatially distributed piezoelectric sensors rather than patch sensors a distribution of the piezoelectric sensors can be easily calculated, which results in the exact measurement of the desired kinematical entity. Based on this exact solution the weights for the sensor network are computed: The piezoelectric patches are placed and weights are assigned based on a static analysis of the structure, in which additional degrees of freedom resulting from the redundancy of the structure are taken into account to optimize the performance of the sensor system. In the second part the analytical solutions are compared to electromechanically coupled three-dimensional Finite Element computations; on the one hand to identify piezoelectric coefficients and permittivities for the analytical model to match the sensing behavior of the Finite Element model, and on the other hand to validate the analytical solution for the sensor network design. The identification of the two material parameters is performed statically for the case of short-circuited electrodes (measuring the electric charge) as well as open electrodes (measuring the voltage). A very good agreement between analytical and numerical results is found.

000013189 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013189 720__ $$aZellhofer, M.$$iKrommer, M.
000013189 8560_ $$ffischerc@itam.cas.cz
000013189 8564_ $$s942535$$uhttps://invenio.itam.cas.cz/record/13189/files/CD255.pdf$$yOriginal version of the author's contribution as presented on CD, section: Inverse problems and system identification.
000013189 962__ $$r13074
000013189 980__ $$aPAPER