Short and Long Term Measurements in Assessment of FRP Composite Footbridge Behavior

Miśkiewicz, Mikołaj; Pyrzowski, Łukasz; Sobczyk, Bartosz

doi:10.3390/ma13030525

Cited by 11 publications

(7 citation statements)

References 51 publications

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“…As with laser scanning, which was not profitable (e.g., high cost of the device, weight of collected data), and yet still found various applications [83][84][85], bathymetric scanning will also be utilised in the analysis of the natural environment, rather than focusing on the technology itself. The data obtained can often discourage researchers, due to the required processing techniques.…”

Section: Discussionmentioning

confidence: 99%

Bringing Bathymetry LiDAR to Coastal Zone Assessment: A Case Study in the Southern Baltic

Tysiąc

2020

Remote Sensing

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One of the major tasks in environmental protection is monitoring the coast for negative impacts due to climate change and anthropopressure. Remote sensing techniques are often used in studies of impact assessment. Topographic and bathymetric procedures are treated as separate measurement methods, while methods that combine coastal zone analysis with underwater impacts are rarely used in geotechnical analyses. This study presents an assessment of the bathymetry airborne system used for coastal monitoring, taking into account environmental conditions and providing a comparison with other monitoring methods. The tests were carried out on a section of the Baltic Sea where, despite successful monitoring, coastal degradation continues. This technology is able to determine the threat of coastal cliff erosion (based on the geotechnical analyses). Shallow depths have been reported to be a challenge for bathymetric Light Detection and Ranging (LiDAR), due to the difficulty in separating surface, water column and bottom reflections from each other. This challenge was overcome by describing the classification method used which was the CANUPO classification method as the most suitable for the point cloud processing. This study presents an innovative approach to identifying natural hazards, by combining analyses of coastal features with underwater factors. The main goal of this manuscript is to assess the suitability of using bathymetry scanning in the Baltic Sea to determine the factors causing coastal erosion. Furthermore, a geotechnical analysis was conducted, taking into account geometrical ground change underwater. This is the first study which uses a coastal monitoring approach, combining geotechnical computations with remote sensing data. This interdisciplinary scientific research can increase the awareness of the environmental processes.

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Section: Discussionmentioning

confidence: 99%

Bringing Bathymetry LiDAR to Coastal Zone Assessment: A Case Study in the Southern Baltic

Tysiąc

2020

Remote Sensing

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“…In the case of the stocktaking of engineering structures, high-accuracy spacing mapping for the purposes of reconstruction or comparison is a very important issue. Publications [ 39 , 40 , 41 , 42 ] have thoroughly described the comprehensive use of measuring devices in order to improve the accuracy. What is more, they list and develop appropriate algorithms for the evaluation of structural performance.…”

Section: Introductionmentioning

confidence: 99%

A New Adaptive Method for the Extraction of Steel Design Structures from an Integrated Point Cloud

Burdziakowski

Zakrzewska

2021

Sensors

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The continuous and intensive development of measurement technologies for reality modelling with appropriate data processing algorithms is currently being observed. The most popular methods include remote sensing techniques based on reflected-light digital cameras, and on active methods in which the device emits a beam. This research paper presents the process of data integration from terrestrial laser scanning (TLS) and image data from an unmanned aerial vehicle (UAV) that was aimed at the spatial mapping of a complicated steel structure, and a new automatic structure extraction method. We proposed an innovative method to minimize the data size and automatically extract a set of points (in the form of structural elements) that is vital from the perspective of engineering and comparative analyses. The outcome of the research was a complete technology for the acquisition of precise information with regard to complex and high steel structures. The developed technology includes such elements as a data integration method, a redundant data elimination method, integrated photogrammetric data filtration and a new adaptive method of structure edge extraction. In order to extract significant geometric structures, a new automatic and adaptive algorithm for edge extraction from a random point cloud was developed and presented herein. The proposed algorithm was tested using real measurement data. The developed algorithm is able to realistically reduce the amount of redundant data and correctly extract stable edges representing the geometric structures of a studied object without losing important data and information. The new algorithm automatically self-adapts to the received data. It does not require any pre-setting or initial parameters. The detection threshold is also adaptively selected based on the acquired data.

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“…Dynamic responses of a suspension bridge in China have been monitored by means of high sampling-rate robotic total station, as it is described in [19]. Application of different sensors and geodetic measurements for the purpose of short and long term measurements of pedestrian bridge response, as well as a structural health monitoring (SHM) system to assess the behavior of a composite footbridge made of fiber-reinforced plastics (FRP) is discussed in [20]. Other example of composite bridge field tests is shown in [21].…”

Section: Introduction and Research Backgroundmentioning

confidence: 99%

Non-Destructive Testing of the Longest Span Soil-Steel Bridge in Europe—Field Measurements and FEM Calculations

2020

Self Cite

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The article describes interdisciplinary and comprehensive non-destructive diagnostic tests of final bridge inspection and acceptance proposed for a soil-steel bridge made of corrugated sheets, being the European span length record holder (25.74 m). As an effect of an original concept a detailed and precise information about the structure short-term response was collected. Periodic diagnostics of bridge deformations was done one year after it was built. Load test design was based on numerical simulations performed by means of finite element method (FEM). In situ measurements were done with the aid of: inductive sensors, optical total station, and terrestrial laser scanner. The results produced by terrestrial laser scanning were used to build a precise image of structure deformation in 3D space during the tests. The accuracy of laser mapping was significantly increased using the information coming from total station and inductive sensors. These have higher accuracy and therefore can be used as reference. Thus, new quality in measurements is introduced. Good correspondence between in situ values and FEM estimations was achieved. Therefore, such a combination of testing methods can be used in non-destructive diagnostics of structures and is an interesting alternative for the standard approach, in which the measurements are done in limited number of points.

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Short and Long Term Measurements in Assessment of FRP Composite Footbridge Behavior

Cited by 11 publications

References 51 publications

Bringing Bathymetry LiDAR to Coastal Zone Assessment: A Case Study in the Southern Baltic

Bringing Bathymetry LiDAR to Coastal Zone Assessment: A Case Study in the Southern Baltic

A New Adaptive Method for the Extraction of Steel Design Structures from an Integrated Point Cloud

Non-Destructive Testing of the Longest Span Soil-Steel Bridge in Europe—Field Measurements and FEM Calculations

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