Vibration Testing of Bridge Stay Cables to Obtain Damping Values

Turek, Martin; Ventura, Carlos E.; Shawwaf, K.

doi:10.1007/978-1-4419-9834-7_31

Cited by 2 publications

(2 citation statements)

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“…In terms of damping ratios for the same detected modes, the MEMS measurements led to a higher uncertainty with respect to the past EMA predictions, see Table 3. In general, however, the predicted damping ratios were found to lie in the range of 0.5-1% and to suggest a certain reliability of MEMS measurements, given the actual sensitivity of damping estimations to several parameters ( [44,[54][55][56][57][58], etc.). Careful consideration, based on the available test measurements, was indeed spent for the correlation of the flexural and torsional vibration shapes of the bridge with past literature measurements.…”

Section: Vibration Modes and Modal Correlationmentioning

confidence: 88%

Prototyping and Validation of MEMS Accelerometers for Structural Health Monitoring—The Case Study of the Pietratagliata Cable-Stayed Bridge

Bedon

Bergamo

Izzi

et al. 2018

JSAN

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In recent years, thanks to the simple and yet efficient design, Micro Electro-Mechanical Systems (MEMS) accelerometers have proven to offer a suitable solution for Structural Health Monitoring (SHM) in civil engineering applications. Such devices are typically characterised by high portability and durability, as well as limited cost, hence resulting in ideal tools for applications in buildings and infrastructure. In this paper, original self-made MEMS sensor prototypes are presented and validated on the basis of preliminary laboratory tests (shaking table experiments and noise level measurements). Based on the well promising preliminary outcomes, their possible application for the dynamic identification of existing, full-scale structural assemblies is then discussed, giving evidence of their potential via comparative calculations towards past literature results, inclusive of both on-site, Experimental Modal Analysis (EMA) and Finite Element Analytical estimations (FEA). The full-scale experimental validation of MEMS accelerometers, in particular, is performed using, as a case study, the cable-stayed bridge in Pietratagliata (Italy). Dynamic results summarised in the paper demonstrate the high capability of MEMS accelerometers, with evidence of rather stable and reliable predictions, and suggest their feasibility and potential for SHM purposes.

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