Frequencies and damping ratios of bridges through Operational Modal Analysis using smartphones

Castellanos-Toro, Sebastián; Marmolejo, Mario; Marulanda, Johannio; Cruz, Alejandro; Thomson, Peter

doi:10.1016/j.conbuildmat.2018.08.089

Cited by 40 publications

(21 citation statements)

References 33 publications

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“…Tests using the VibSensor application on a shaking table performed by Castellanos-Toro et al [52] have shown that modern smartphones are suitable for engineering tasks such as dynamic structural monitoring. However, laboratory calibrations are still required to ensure the correct functioning of the measurement instrument and the software used for the collection of the vibration data.…”

Section: Vibsensor Based Smartphone Accelerometer Data Collectionmentioning

confidence: 99%

Measured dynamic properties of web-core sandwich panel FRP composite footbridges and their relation to pedestrian comfort analysis

Uyttersprot

Corte

2021

Composite Structures

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This paper reports experimental data for the dynamic properties (i.e. first fundamental flexural frequency, damping ratio, comfort class) of ten web-core sandwich panel FRP composite footbridges in Belgium, which contributes to the assessment of relevant input parameters for design and assessment of this promising bridge type, quickly gaining popularity in recent years. The data is gathered based on smartphone accelerometers, enabling easy, quick, affordable, and abundant measurements, while at the same time yielding reliable experimental values. Given the relatively short spans, the heel and excitation test methods are used, rather than the ambient vibration method. The tests indicate damping ratios of one to three percent, which are strongly dependent on the number of people on the bridge during the measurement. Additionally, comfort analysis tests with up to 58 people (0.5 P/m²) were conducted on five out of the ten bridges. The results indicate that the current design guidelines for pedestrian comfort analysis are overconservative and do not reflect the effect of pedestrian-induced damping, which is especially apparent for this bridge type given its very low modal mass and relatively low damping ratio.

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Section: Vibsensor Based Smartphone Accelerometer Data Collectionmentioning

confidence: 99%

Measured dynamic properties of web-core sandwich panel FRP composite footbridges and their relation to pedestrian comfort analysis

Uyttersprot

Corte

2021

Composite Structures

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“…Several recent projects encompass the realization of prototypes of MEMS-based (mainly accelerometers and gyroscopes) monitoring station specifically designed for SHM: they are based on the measure of the structural vibration, from which structural health and post-event (e.g., earthquake) damage can be diagnosed [22,23,61,92,93,94,95,96,97,98,99]. Other studies also investigated the possibility to use the MEMS accelerometers integrated within the smartphones to develop citizen-engaging networks for SHM, like the ones created for earthquake observation and EEW [30,62,100,101].…”

Section: Application Of Capacitive Mems Accelerometers To Seismologymentioning

confidence: 99%

A Review of the Capacitive MEMS for Seismology

D’Alessandro

Scudero

Vitale

2019

Sensors

109

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MEMS (Micro Electro-Mechanical Systems) sensors enable a vast range of applications: among others, the use of MEMS accelerometers for seismology related applications has been emerging considerably in the last decade. In this paper, we provide a comprehensive review of the capacitive MEMS accelerometers: from the physical functioning principles, to the details of the technical precautions, and to the manufacturing procedures. We introduce the applications within seismology and earth sciences related disciplines, namely: earthquake observation and seismological studies, seismic surveying and imaging, structural health monitoring of buildings. Moreover, we describe how the use of the miniaturized technologies is revolutionizing these fields and we present some cutting edge applications that, in the very last years, are taking advantage from the use of MEMS sensors, such as rotational seismology and gravity measurements. In a ten-year outlook, the capability of MEMS sensors will certainly improve through the optimization of existing technologies, the development of new materials, and the implementation of innovative production processes. In particular, the next generation of MEMS seismometers could be capable of reaching a noise floor under the lower seismic noise (few tenths of ng/ H z ) and expanding the bandwidth towards lower frequencies (∼0.01 Hz).

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“…The seismic isolators assessed in this study are made of high damping rubber (HDR) without a lead core and with chemical compounds added to the rubber sheets to increase the damping of the rubber by up to 20% (17). The results of the project led by the G-7 research group of the Del Valle University, entitled "Technological development of a low-cost seismic isolator for low rise buildings" (18), were used in this case, including the costs of devices (19) and the characteristics of the materials used (20)(21)(22).…”

Section: Introductionmentioning

confidence: 99%

Repotenciación sísmica con aislamiento de cubierta como amortiguador de masa sintonizado para edificios académicos

Marulanda

Thomson

Tocoche

2022

inycomp

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Frequencies and damping ratios of bridges through Operational Modal Analysis using smartphones

Cited by 40 publications

References 33 publications

Measured dynamic properties of web-core sandwich panel FRP composite footbridges and their relation to pedestrian comfort analysis

Measured dynamic properties of web-core sandwich panel FRP composite footbridges and their relation to pedestrian comfort analysis

A Review of the Capacitive MEMS for Seismology

Repotenciación sísmica con aislamiento de cubierta como amortiguador de masa sintonizado para edificios académicos

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