Deformation Monitoring of a Simply Supported Railway Bridge under Varying Dynamic Loads

Faulkner, Karen; Huseynov, Farhad; Brownjohn, James; Xu, You‐Lin

doi:10.1201/9781315189390-202

Cited by 9 publications

(2 citation statements)

References 6 publications

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“…Another major advancement would be to employ this framework in conjunction with sensory data from actual structures. Instead of conventional contact-based sensors, this could be achieved with non-contact sensing techniques such as Digital Image Correlation [42][43][44]. This would provide an updated model-driven SHM approach based on modal frequencies in the spirit of [32], however with a state-of-the-art block-based model.…”

Section: Discussionmentioning

confidence: 99%

Three-Dimensional Discrete Element Modelling of Rubble Masonry Structures From Geospatial Data

Kassotakis,

Sarhosis,

Pillai

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This paper presents a framework for the three-dimensional structural analysis of full-scale, geometrically irregular discontinuum structures such as rubble masonry, directly from geospatial data. A convex decomposition algorithm is adopted, whereby a watertight mesh is subdivided into so-called voronoi blocks which approximate the anisotropic nature of the rubble masonry for structural analysis. The proposed "Voronoi4DEM" framework was implemented to assess the structural stability of the southwest leaning tower of Caerphilly Castle in Wales, UK. Simulations were performed with the three-dimensional computational software 3DEC, based on the Discrete Element Method (DEM) of analysis whilst each voronoi block of the rubble masonry was represented as a rigid, distinct block while mortar joints were modelled as zero thickness interfaces which can open and close depending on the magnitude and direction of the stresses applied to them. The innovation of this framework lies in the specific geometric strategy which approximates the random nature of discontinuous materials at a blockbased level (such as rubble) with sufficient accuracy, whilst vastly reducing computational times. Consequently, the approach can simulate the highly complex behaviour of rubble masonry structures with a high degree of efficiency, geometric accuracy, and automation. It is anticipated that the methodology proposed here to enable unprecedented high-level numerical modelling (block-based numerical modelling) of full-scale rubble masonry structures with, until now, unemployed techniques such as the DEM.

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Section: Discussionmentioning

confidence: 99%

Three-Dimensional Discrete Element Modelling of Rubble Masonry Structures From Geospatial Data

Kassotakis,

Sarhosis,

Pillai

et al. 2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…Examination regarding the wind load influence on the footbridge structure of an untypical structure was carried out by assuming lateral wind pressure [27]. Varying dynamic loads could also affect the deformation of a simply supported railway bridge [28], [29]. Bearing these factors in mind, therefore, the moving loads (ML) model describing a load as a set of concentrated forces moving at a constant speed was considered during numerical analysis.…”

Section: Loading Characteristics Of the Railway Bridgementioning

confidence: 99%

Behavior of a steel structure railway bridge under dynamic loadings

Abi,

Agoeng,

Barasa

et al. 2024

J Appl Eng Science

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Most old steel structure railway bridges in Indonesia have deteriorated throughout their service life since they were constructed almost a century ago. However, those bridges' performance must be maintained to have essential safety issues and live extension of the railway bridge structure. Therefore, inspecting and evaluating those steel railway bridges is necessary to maintain the service requirement. Vertical deformation of the steel railway bridge caused by dynamic loadings needs to be observed. The objective of the study is to assess the old steel railway bridge by evaluating the strength characteristics of the structures against the working forces, particularly the moving, wind, and seismic loads. In order to understand the phenomena impacted by the dynamic loadings, the steel structure railway bridge was instrumented using deformation sensors, strain gages, accelerometers, and passive infrared. The steel railway bridge was analyzed using a 3D finite element model. This study discussed the influence of dynamic loadings on the steel structure railway bridge. This paper elaborates and provides suggestions to solve problems and recommended action in practice for future study. This paper may be useful for researchers and practicing engineers.

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New Sensors and Digital Data Processing Algorithms for Monitoring Railway Bridges

Olaszek

2024

Digital Innovations in Architecture, Engineering and Construction

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Deformation Monitoring of a Simply Supported Railway Bridge under Varying Dynamic Loads

Cited by 9 publications

References 6 publications

Three-Dimensional Discrete Element Modelling of Rubble Masonry Structures From Geospatial Data

Three-Dimensional Discrete Element Modelling of Rubble Masonry Structures From Geospatial Data

Behavior of a steel structure railway bridge under dynamic loadings

New Sensors and Digital Data Processing Algorithms for Monitoring Railway Bridges

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