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RISS 인기검색어
- 검색키워드
- 저자 : José Campos e Matos (검색결과 2 건)
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Health Monitoring System (HMS) for structural assessment
José Campos e Matos,Oscar Garcia,António Abel Henriques,Josep Vehí,Joan Ramon Casas 국제구조공학회 2009 Smart Structures and Systems, An International Jou Vol.5 No.3
As in any engineering application, the problem of structural assessment should face the different uncertainties present in real world. The main source of uncertainty in Health Monitoring System (HMS) applications are those related to the sensor accuracy, the theoretical models and the variability in structural parameters and applied loads. In present work, two methodologies have been developed to deal with these uncertainties in order to adopt reliable decisions related to the presence of damage. A simple example, a steel beam analysis, is considered in order to establish a liable comparison between them. Also, such methodologies are used with a developed structural assessment algorithm that consists in a direct and consistent comparison between sensor data and numerical model results, both affected by uncertainty. Such algorithm is applied to a simple concrete laboratory beam, tested till rupture, to show it feasibility and operational process. From these applications several conclusions are derived with a high value, regarding the final objective of the work, which is the implementation of this algorithm within a HMS, developed and applied into a prototype structure.
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Static and Fatigue Test on Real Steel Bridge Components Deteriorated by Corrosion
Martin Macho,Pavel Ryjáček,José Campos e Matos 한국강구조학회 2019 International Journal of Steel Structures Vol.19 No.1
The combined eff ects of corrosion and fatigue have become a topic issue in recent times. Decades-old steel bridges that are still in service need to be reassessed. However, there is no relevant background information that can be used in assessment of this phenomenon. There are no recommendations for civil engineers how to take into account the corrosion weakening for the assessment of bearing capacity and fatigue strength of riveted members. For this reason the aim of the research presented in this paper was preparation and execution of laboratory tests on real bridge components that were deteriorated by corrosion. Two types of tests were performed to fi nd out how corrosion weakening aff ects the statics and the fatigue strength of members. The evaluation of the tests indicates that the service life of members may be signifi cantly reduced due to fatigue. In addition, the bearing capacity is reduced while, in particular, the local stress rises. All of this is strongly dependent on the level of corrosion and the surface irregularities. Our paper ends with recommendations on how the loss of material due to corrosion could be taken into account for an assessment of the load capacity and the residual lifetime of members.
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