This paper focuses on the dynamic behaviour of Mirandola City Hall (a XV century Renaissance Palace) that was severed damaged during May 2012 Emilia earthquake in Northern Italy. Experimental and numerical investigations have been carried out on this monumental building. Firstly, detailed investigations have been devoted to the identification of the geometry of the main constructional parts as well as the mechanical features of the constituting materials of the palace. Then, Ambient Vibration Tests (AVT) have been applied, for the detection of the main dynamic features. Three output-only identification methods have been compared: (i) the Frequency Domain Decomposition, (ii) the Random Decrement (RD) and the (iii) Eigensystem Realization Algorithm (ERA). The modal parameters of the Palace were difficult to be identified due to the severe structural damage; however the two bending modes in the perpendicular directions were identified. The comparison of the three experimental techniques shows good agreement confirming the reliability of the three identification methods.
PRELIMINARY ANALYSIS OF AMBIENT VIBRATION TESTS OF AN ANCIENT RENAISSANCE PALACE AFTER 2012 EMLIA EARTHQUAKE IN NORTHERN ITALY
BOSCATO, GIOSUE';RUSSO, SALVATORE;
2013-01-01
Abstract
This paper focuses on the dynamic behaviour of Mirandola City Hall (a XV century Renaissance Palace) that was severed damaged during May 2012 Emilia earthquake in Northern Italy. Experimental and numerical investigations have been carried out on this monumental building. Firstly, detailed investigations have been devoted to the identification of the geometry of the main constructional parts as well as the mechanical features of the constituting materials of the palace. Then, Ambient Vibration Tests (AVT) have been applied, for the detection of the main dynamic features. Three output-only identification methods have been compared: (i) the Frequency Domain Decomposition, (ii) the Random Decrement (RD) and the (iii) Eigensystem Realization Algorithm (ERA). The modal parameters of the Palace were difficult to be identified due to the severe structural damage; however the two bending modes in the perpendicular directions were identified. The comparison of the three experimental techniques shows good agreement confirming the reliability of the three identification methods.
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