Dynamic elastic properties of brick masonry constituents

Makoond, Nirvan; Pelà, Luca; Molins, Climent

doi:10.1016/j.conbuildmat.2018.12.071

Cited by 33 publications

(40 citation statements)

References 19 publications

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“…That consistency is also obtained for all other saturation degrees, given that the moisture conditioning there consists of supplying a preset amount of water to the sample. Resultantly, these large variations in V most possibly come from the natural variability in the mechanical properties of the samples, similar to the cases for dry samples [53,54]. One explanation is that there are tiny cracks and fissures in samples.…”

Section: Appendix: Materials Inhomogeneity and The Ultrasonic Testmentioning

confidence: 62%

Towards a more representative assessment of frost damage to porous building materials

Feng

Roels

Janssen

2019

Building and Environment

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Current frost resistance tests rely on freeze-thaw cycling at very low frost temperatures and very high moisture contents, conditions that not readily reflect the spectrum of milder frost conditions met at actual exposure. This analysis performs freeze-thaw testing on four types of ceramic brick at frost temperatures from -2 °C to -20 °C and moisture saturation degrees from 0.1 to 1.0. The outcomes prove that both the frost temperature and the moisture content affect the extent of frost damage. The extension of frost test conditions proves to be more representative, and the application of frost damage isopleths is therefore suggested.

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Section: Appendix: Materials Inhomogeneity and The Ultrasonic Testmentioning

confidence: 62%

Towards a more representative assessment of frost damage to porous building materials

Feng

Roels

Janssen

2019

Building and Environment

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“…A aplicação da técnica de posicionamento do ultrassom direto está pontualmente ligado ao viés das pesquisas levantadas que, em sua maioria, realizaram o ensaio em ambiente controlado com um componente isolado da alvenaria, como visto em Mishra et al (2019), ou ainda em uma alvenaria de pequeno porte onde os dois lados da amostra eram facilmente acessíveis como visto em Zielińska e Rucka (2018) e Khodaverdian e Shomali (2010). Além disso, houve aplicação em componentes da alvenaria como tijolos ou argamassas, como observado em Makoond et al (2019) e Noor-e-Khuda e Albermani (2019). A parcela de artigos que usaram o método indireto de medição teve como direcionamento de pesquisa a análise de estruturas em campo, como visto em Camassa et al (2019) e Mesquita et al (2018).…”

Section: Resultados E Discussõesunclassified

Tratamento de dados de ensaio ultrassônico em alvenarias: uma Revisão Sistemática de Literatura

Filho¹,

Rodrigues²,

Paz³

et al. 2021

Congresso Internacional Sobre Patologia E Reabilitação Das Construções

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Given their high cultural value, historic buildings play an important role for societies, so their conservation and preservation are the focus of several studies. From the Civil Engineering perspective, they represent a great challenge, as they show great constructive variability and refined care treatment regarding the application of tests, since these buildings have high historical value. In this context, non-destructive techniques appear as a tool for analyzing those structures in need of differentiated care. The ultrasound test, in particular, has been gaining prominence in the area due to its low cost and ease of reapplication. To better understand the scientific scenario, the present work aims to carry out a systematic review of the literature in the main databases to learn how to interpret ultrasonic data in solid masonry. It was found that the study of ultrasound application on masonry has increased in recent years, but not in regard to the use of statistical models for data interpretation, for which the amount of published works is still relatively low. Thus, a gap in literature was noticed, opening the space for the development of new research.

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“…The needed power for the real-time controller was supplied through a constant current power supply. The signal conditioner, together with this power-supply, assured the constant current excitation to the sensors required for proper operation [ 49 ]. The program used for data acquisition was able to record the acceleration time-history from the two connected accelerometers simultaneously [ 49 ].…”

Section: Signal Acquisition and Processing Systemmentioning

confidence: 99%

Development of a Low-Cost System for the Accurate Measurement of Structural Vibrations

Komarizadehasl

Mobaraki

et al. 2021

Sensors

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Nowadays, engineers are widely using accelerometers to record the vibration of structures for structural verification purposes. The main obstacle for using these data acquisition systems is their high cost, which limits its use to unique structures with a relatively high structural health monitoring budget. In this paper, a Cost Hyper-Efficient Arduino Product (CHEAP) has been developed to accurately measure structural accelerations. CHEAP is a system that is composed of five low-cost accelerometers that are connected to an Arduino microcontroller as their data acquisition system. Test results show that CHEAP not only has a significantly lower price (14 times cheaper in the worst-case scenario) compared with other systems used for comparison but also shows better accuracy on low frequencies for low acceleration amplitudes. Moreover, the final output results of Fast Fourier Transformation (FFT) assessments showed a better observable resolution for CHEAP than the studied control systems.

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Dynamic elastic properties of brick masonry constituents

Cited by 33 publications

References 19 publications

Towards a more representative assessment of frost damage to porous building materials

Towards a more representative assessment of frost damage to porous building materials

Tratamento de dados de ensaio ultrassônico em alvenarias: uma Revisão Sistemática de Literatura

Development of a Low-Cost System for the Accurate Measurement of Structural Vibrations

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