This work resumes a research that proposes the use of the technique based on the dissipation ener... more This work resumes a research that proposes the use of the technique based on the dissipation energy of the shape memory alloy (SMA) ties. It focuses principally on the assessment of the effectiveness of the use of these smart materials on displacements, accelerations and the stresses of the minaret of the great mosque of Ajloun in Jordan. The 3-D finite element model of the minaret is performed by the ANSYS software. First of all, the proposed model is calibrated and validated according to the experimental results gathered from ambient vibration testing results. Then, a nonlinear transient analysis is considered, when the El-Centro earthquake is used as the input signal. Different simulating cases concerning the location, number and type of SMA devices are proposed in order to see their influence on the seismic response of the minaret. Hence, the results confirm the effectiveness of the proposed SMA device.
Cette contribution resume une application experimentale basee sur la detection de la signature vi... more Cette contribution resume une application experimentale basee sur la detection de la signature vibratoire d’un portique en acier par la technique d’identification appelee « input-output ». Pour cela, un test sur table vibrante est realise sur la structure reduite sous une excitation dynamique harmonique. La reponse dynamique est mesuree par des accelerometres uni-axiaux repartis sur le portique etudie. L’analyse des resultats, par le logiciel MATLAB, a permis l’identification des caracteristiques dynamiques (periodes, frequences et modes propres de vibration) de la structure. Un modele tridimensionnel en elements finis est ensuite construit et calibre en fonction des caracteristiques dynamiques prealablement identifiees. La comparaison entre le resultat experimentalement detecte et celui numeriquement construit a permis la validation de la technique d’identification proposee.
ABSTRACT The effectiveness of using the advanced seismic protection technology based on shape mem... more ABSTRACT The effectiveness of using the advanced seismic protection technology based on shape memory alloy (SMA) dampers to preserve a historical minaret is investigated. The proposed studied case, the minaret of Mansourah, is a seven century old minaret located in Tlemcen, Algeria. Its original height was of 47m, while nowadays, the monument is half destructed and its current height reaches the 40m. The proposed seismic retrofit is based on the technique that utilizes SMA wires as dampers for the upper flexible part of the minaret. The effectiveness of the proposed technique is numerically evaluated via non-linear finite element analysis using the structural software ANSYS. The effectiveness of the proposed device in mitigating the seismic hazard is demonstrated by the effective reduction in its dynamic response.
This work resumes a research that proposes the use of the technique based on the dissipation ener... more This work resumes a research that proposes the use of the technique based on the dissipation energy of the shape memory alloy (SMA) ties. It focuses principally on the assessment of the effectiveness of the use of these smart materials on displacements, accelerations and the stresses of the minaret of the great mosque of Ajloun in Jordan. The 3-D finite element model of the minaret is performed by the ANSYS software. First of all, the proposed model is calibrated and validated according to the experimental results gathered from ambient vibration testing results. Then, a nonlinear transient analysis is considered, when the El-Centro earthquake is used as the input signal. Different simulating cases concerning the location, number and type of SMA devices are proposed in order to see their influence on the seismic response of the minaret. Hence, the results confirm the effectiveness of the proposed SMA device.
Cette contribution resume une application experimentale basee sur la detection de la signature vi... more Cette contribution resume une application experimentale basee sur la detection de la signature vibratoire d’un portique en acier par la technique d’identification appelee « input-output ». Pour cela, un test sur table vibrante est realise sur la structure reduite sous une excitation dynamique harmonique. La reponse dynamique est mesuree par des accelerometres uni-axiaux repartis sur le portique etudie. L’analyse des resultats, par le logiciel MATLAB, a permis l’identification des caracteristiques dynamiques (periodes, frequences et modes propres de vibration) de la structure. Un modele tridimensionnel en elements finis est ensuite construit et calibre en fonction des caracteristiques dynamiques prealablement identifiees. La comparaison entre le resultat experimentalement detecte et celui numeriquement construit a permis la validation de la technique d’identification proposee.
ABSTRACT The effectiveness of using the advanced seismic protection technology based on shape mem... more ABSTRACT The effectiveness of using the advanced seismic protection technology based on shape memory alloy (SMA) dampers to preserve a historical minaret is investigated. The proposed studied case, the minaret of Mansourah, is a seven century old minaret located in Tlemcen, Algeria. Its original height was of 47m, while nowadays, the monument is half destructed and its current height reaches the 40m. The proposed seismic retrofit is based on the technique that utilizes SMA wires as dampers for the upper flexible part of the minaret. The effectiveness of the proposed technique is numerically evaluated via non-linear finite element analysis using the structural software ANSYS. The effectiveness of the proposed device in mitigating the seismic hazard is demonstrated by the effective reduction in its dynamic response.
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