This paper presents the results of an experimental dynamic campaign carried out on a reinforced concrete multi-span arch bridge. Five expeditious ambient vibration tests were conducted separately on five spans (one test in each span) of the bridge using only six piezoelectric uniaxial accelerometers. Modal parameters were identified through the well-known Enhanced Frequency Domain Decomposition (EFDD) procedure developed using Matlab R2021b software. At the same time, a finite element model was accurately implemented through a commercial software (Midas Civil) to evaluate the main modal features. A manual model update was successively pursued varying the elastic modulus of the reinforced concrete to make the identified and numerical modes as close as possible. A complete and suitable instrumentation to perform global experimental dynamic tests is not always available. Recursive/Multiple tests have different advantages: handy, easily executable, and could provide a more robust identification thanks to a statical characterization. The paper aims to highlight the peculiarities of recursive/multiple dynamic tests on multi-span arch bridges. The procedure also provides useful suggestions for designing a permanent and continuous vibration-based monitoring system.

Multiple Tests for Dynamic Identification of a Reinforced Concrete Multi-Span Arch Bridge / Gattulli, V; Potenza, F; Piccirillo, G. - In: BUILDINGS. - ISSN 2075-5309. - 12:6(2022), p. 833. [10.3390/buildings12060833]

Multiple Tests for Dynamic Identification of a Reinforced Concrete Multi-Span Arch Bridge

Gattulli, V
Methodology
;
2022

Abstract

This paper presents the results of an experimental dynamic campaign carried out on a reinforced concrete multi-span arch bridge. Five expeditious ambient vibration tests were conducted separately on five spans (one test in each span) of the bridge using only six piezoelectric uniaxial accelerometers. Modal parameters were identified through the well-known Enhanced Frequency Domain Decomposition (EFDD) procedure developed using Matlab R2021b software. At the same time, a finite element model was accurately implemented through a commercial software (Midas Civil) to evaluate the main modal features. A manual model update was successively pursued varying the elastic modulus of the reinforced concrete to make the identified and numerical modes as close as possible. A complete and suitable instrumentation to perform global experimental dynamic tests is not always available. Recursive/Multiple tests have different advantages: handy, easily executable, and could provide a more robust identification thanks to a statical characterization. The paper aims to highlight the peculiarities of recursive/multiple dynamic tests on multi-span arch bridges. The procedure also provides useful suggestions for designing a permanent and continuous vibration-based monitoring system.
2022
multiple dynamic tests; multi-span arch bridges; modal identification; arch bridge modeling; manual model updating
01 Pubblicazione su rivista::01a Articolo in rivista
Multiple Tests for Dynamic Identification of a Reinforced Concrete Multi-Span Arch Bridge / Gattulli, V; Potenza, F; Piccirillo, G. - In: BUILDINGS. - ISSN 2075-5309. - 12:6(2022), p. 833. [10.3390/buildings12060833]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1676142
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