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Subject = Structural health monitoring;
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Displaying Results 1 - 25 of 76 on page 1 of 4
Marked
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A bridge monitoring tool based on bridge and vehicle accelerations
(2015)
Hester, David; González, Arturo
A bridge monitoring tool based on bridge and vehicle accelerations
(2015)
Hester, David; González, Arturo
Abstract:
Previous research on damage detection based on the response of a structure to a moving load has reported decay in accuracy with increasing load speed. Using a 3D vehicle–bridge interaction model, this paper shows that the area under the filtered acceleration response of the bridge increases with increasing damage, even at highway load speeds. Once a datum reading is established, the area under subsequent readings can be monitored and compared with the baseline reading, if an increase is observed it may indicate the presence of damage. The sensitivity of the proposed approach to road roughness and noise is tested in several damage scenarios. The possibility of identifying damage in the bridge by analysing the acceleration response of the vehicle traversing it is also investigated. While vehicle acceleration is shown to be more sensitive to road roughness and noise and therefore less reliable than direct bridge measurements, damage is successfully identified in favourable scenarios.
http://hdl.handle.net/10197/6291
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A bridge-vehicle interaction based experimental investigation of damage evolution
(2010)
Pakrashi, Vikram; O'Connor, Alan J.; Basu, Biswajit
A bridge-vehicle interaction based experimental investigation of damage evolution
(2010)
Pakrashi, Vikram; O'Connor, Alan J.; Basu, Biswajit
Abstract:
This article presents an experimental monitoring of the evolution of a crack in a beam using beam-vehicle interaction response signals for identification of progressively increasing crack-depth ratios. The beam is traversed by a two-axle model vehicle providing excitation in the time domain for the various extents of damage. The response of the beam in the time domain during the period of forced vibration is measured using strain gages. A consistent evolution of damage has been demonstrated in terms of the maxima values of the measured responses. The corresponding distortions of wavelet coefficients of the measured strain data due to the presence of various levels of damage have been identified. The evolution of the phase space and the wavelet transformed phase spaces have been evaluated with damage evolution. The wavelet transformed phase spaces for the undamaged and the damaged cases are observed to be distinctly different at high scales. The importance of denoising of the acquire...
http://hdl.handle.net/10468/292
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A Combined Structural Health Monitoring and Weigh-in-Motion System for Railway Bridges
(2015)
Favai, Peter; O'Brien, Eugene J.; Znidaric, Ales; et al.
A Combined Structural Health Monitoring and Weigh-in-Motion System for Railway Bridges
(2015)
Favai, Peter; O'Brien, Eugene J.; Znidaric, Ales; et al.
Abstract:
Proceedings of the 6th International Conference on Mechanics and Materials in Design, Ponta Delgada, Azores, Portugal, 26 - 30 July, 2015
Many bridges in the world’s transport infrastructure are old and have deteriorated over time. The solution to this problem is to either repair or replace a bridge or to establish its safety and maintain it in service. It is generally very costly to repair or replace a bridge. With reduced maintenance budgets there is an increasing interest in maintaining these old bridges in service for longer by using probabilistic methods to prove that they are safe. Bridge safety is assessed based on (i) the loading which it will experience in service and (ii) the resistance of the structure. Improved knowledge of loading and resistance allows a more accurate assessment of whether a bridge is safe to remain in service without the requirement for expensive repair or replacement strategies. A system that combines Structural Health Monitoring (SHM) with Bridge...
http://hdl.handle.net/10197/7046
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A Delay Vector Variance based marker for an output-only assessment of structural changes in tension leg platforms
(2015)
Jaksic, Vesna; Wright, Christopher S.; Mandic, D. P.; Murphy, Jimmy; Pakrashi, Vikram
A Delay Vector Variance based marker for an output-only assessment of structural changes in tension leg platforms
(2015)
Jaksic, Vesna; Wright, Christopher S.; Mandic, D. P.; Murphy, Jimmy; Pakrashi, Vikram
Abstract:
Although aspects of power generation of many offshore renewable devices are well understood, their dynamic responses under high wind and wave conditions are still to be investigated to a great detail. Output only statistical markers are important for these offshore devices, since access to the device is limited and information about the exposure conditions and the true behaviour of the devices are generally partial, limited, and vague or even absent. The markers can summarise and characterise the behaviour of these devices from their dynamic response available as time series data. The behaviour may be linear or nonlinear and consequently a marker that can track the changes in structural situations can be quite important. These markers can then be helpful in assessing the current condition of the structure and can indicate possible intervention, monitoring or assessment. This paper considers a Delay Vector Variance based marker for changes in a tension leg platform tested in an ocean...
http://hdl.handle.net/10468/2587
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A New Damage Indicator for Drive-by Monitoring using Instantaneous Curvature
(2017)
O'Brien, Eugene J.; Martinez, Daniel; Malekjafarian, Abdollah; Pape, Torill
A New Damage Indicator for Drive-by Monitoring using Instantaneous Curvature
(2017)
O'Brien, Eugene J.; Martinez, Daniel; Malekjafarian, Abdollah; Pape, Torill
Abstract:
Austroads Bridge Conference 2017 (ABC 2017), Pullman Melbourne Albert Park, Melbourne, Australia, 3-6 April 2017
Drive-by monitoring has enhanced the possibilities for bridge damage detection, with the potential to deliver a bridge rating in the time it takes an instrumented vehicle to pass overhead. This paper outlines the importance of Instantaneous Curvature (IC) as an indicator of local damage. For the IC calculation, bridge deflections are measured from the vehicle before and after the occurrence of damage, so that a comparison between the two situations can be made. Differences in curvature are clearly visible in numerical simulations, especially at the damage location. A Finite Element model of a simply supported bridge subject to a crossing vehicle is modelled dynamically. In this paper, the Curvature Ratio (CR) is proposed as the damage indicator, defined as the ratio of IC in the current bridge to IC in the corresponding healthy bridge. Road profile and random noise in...
http://hdl.handle.net/10197/8561
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A study on the effects of damage models and wavelet bases for damage identification and calibration in beams
(2007)
Pakrashi, Vikram; O'Connor, Alan J.; Basu, Biswajit
A study on the effects of damage models and wavelet bases for damage identification and calibration in beams
(2007)
Pakrashi, Vikram; O'Connor, Alan J.; Basu, Biswajit
Abstract:
Damage detection and calibration in beams by wavelet analysis involve some key factors such as the damage model, the choice of the wavelet function, the effects of windowing, and the effects of masking due to the presence of noise during measurement. A numerical study has been performed in this article addressing these issues for single and multispan beams with an open crack. The first natural modeshapes of single and multispan beams with an open crack have been simulated considering damage models of different levels of complexity and analyzed for different crack depth ratios and crack positions. Gaussian white noise has been synthetically introduced to the simulated modeshape and the effects of varying signal-to-noise ratio have been studied. A wavelet-based damage identification technique has been found to be simple, efficient, and independent of damage models and wavelet basis functions, once certain conditions regarding the modeshape and the wavelet bases are satisfied. The wave...
http://hdl.handle.net/10468/295
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Acceleration-based Bridge Scour Monitoring
(2019)
Fitzgerald, PC; O'Brien, Eugene J.; Malekjafarian, Abdollah; Prendergast, Luke J.
Acceleration-based Bridge Scour Monitoring
(2019)
Fitzgerald, PC; O'Brien, Eugene J.; Malekjafarian, Abdollah; Prendergast, Luke J.
Abstract:
The 8th Conference on Computational Stochastic Mechanics (CSM8), Paros, Greece, 10-13 June 2018
This paper comes from a research project focused on the safety assessment of bridges using camera-based technologies. The project is developing methods that transform measured sensor signals and video images into a form that is highly damage-sensitive for bridge safety assessment. It will advance sensor-based structural health monitoring with computer-vision and accelerometer-based techniques, leading to practical applications for bridge damage detection. Many sensor types have been used in test installations, with varying degrees of success. Strain gauges and transducers are well established technologies and sufficiently accurate sensors are available at a reasonable cost. However, strain transducers can only detect damage if it occurs close to the point of measurement and are completely insensitive to scour-induced settlement. Deflection at any point on a bridge is a function of sup...
http://hdl.handle.net/10197/10467
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Addressing uncertainty to make infrastructure safer
(2019)
González, Arturo
Addressing uncertainty to make infrastructure safer
(2019)
González, Arturo
Abstract:
Some infrastructure is experiencing a fast rate of deterioration as a result of poor design/ construction/ maintenance or more demanding loads than anticipated, and many buildings, transport, and energy infrastructure are getting close to the ends of their design lives. There is a need for assessing the safety of these structures, i.e., to check that the probability of the structural response falling beyond an established threshold for a given period of time is acceptable. This calculation involves defining a number of input variables that include loading as well as structural properties such as moduli of elasticity, material strength, geometry, boundary conditions, etc.
European Commission Horizon 2020
http://hdl.handle.net/10197/10681
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An image analysis based damage classification methodology
(2007)
Pakrashi, Vikram; O'Connor, Alan J.; Schoefs, Franck
An image analysis based damage classification methodology
(2007)
Pakrashi, Vikram; O'Connor, Alan J.; Schoefs, Franck
Abstract:
Measurement of the extent of damage in a real structure is extremely important in terms of any maintenance strategy. However, this measurement often turns out to be difficult, time consuming and error – prone. The necessity of a simple, fast and relatively inexpensive damage monitoring system with reliable measurements is growing for quite sometime. The paper proposes a camera based image analysis technique to quantify and classify damage in structures at various levels of scale. The general method has been applied to corroded plate specimens in the laboratory with the aim to identify the affected areas on a steel pile due to pitting corrosion. The method depends on the contrast of the corroded region with respect to its surroundings, performs intelligent edge detection through image processing techniques and computes each affected and closed region to predict the total area of the affected part along with its spatial distribution on a two dimensional plane. Moreover the performance...
http://hdl.handle.net/10468/260
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Analysis of the behaviour of hybrid concrete lattice girder slabs during construction using laboratory and field testing
(2020)
Shane, Newell
Analysis of the behaviour of hybrid concrete lattice girder slabs during construction using laboratory and field testing
(2020)
Shane, Newell
Abstract:
One of the emerging technologies in construction is the development of ‘smart structures’ which have sensors which will allow more efficient, resilient and sustainable structures to be designed and constructed. This research focusses on the use of embedded sensors and testing to better understand the behaviour of hybrid concrete lattice girder flat slabs, which is classified as a Modern Method of Construction (MMC). Despite the popularity of concrete flat slabs in structures and the increasing adoption of hybrid concrete lattice girder slabs to construct flat slabs, there is a dearth of information on how they perform during construction and in use. A programme of insitu field monitoring and laboratory testing was conducted to investigate the actual behaviour of hybrid concrete lattice girder flat slabs. In the literature, there are very few case studies in relation to monitoring of concrete floors using field data. The methodology and implementation of a real-time structural heal...
http://hdl.handle.net/10379/15759
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Application of S transform in structural health monitoring
(2009)
Pakrashi, Vikram; Ghosh, Bidisha
Application of S transform in structural health monitoring
(2009)
Pakrashi, Vikram; Ghosh, Bidisha
Abstract:
The successful detection of change in a data or in any of its derivatives in the presence of noise is a critical component of structural health monitoring and damage detection. This sudden change can be brought about by a sudden change in the strain or the stress field of the structural system under consideration. Two very typical examples of such sudden changes are the sudden change in stiffness of a vibrating single degree of freedom system in time and the local perturbation of stress and strain fields of a beamlike structure in space due to the presence of an open crack. New methods and analysis techniques have become popular in the field of structural health monitoring to detect and characterise such changes. Time – frequency techniques, like wavelet analysis are being more widely used in this regard in the recent times for the detection of presence, location and the calibration of the extent of these changes. This paper presents the application of S transform for the successful...
http://hdl.handle.net/10468/240
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Application of the cross-entropy method to estimate stiffness distribution in plate-type structures
(2014)
Walsh, Brian J.; González, Arturo; Cantero, Daniel
Application of the cross-entropy method to estimate stiffness distribution in plate-type structures
(2014)
Walsh, Brian J.; González, Arturo; Cantero, Daniel
Abstract:
The Tenth International Conference on Computational Structures Technology, CST2010, Valencia, Spain, 14-17 September, 2010
This paper examines the use of the cross-entropy (CE) method to estimate the structural parameters of a plate structure, given data from a simulated non-destructive static loading test. Finite element models of plates are created, with properties close to that of a bridge of similar dimensions. Damage is introduced to the models by local reductions in the longitudinal Young’s modulus (Ex). In practice, reduced values of Ex may result from material irregularities, poor construction methods and structural degradation due to weathering and/or impact. By assembling combinations of Ex values, the CE method searches the solution space of possible combinations of Ex values. The location and severity of the damage is varied to test the ability of the algorithm to identify different damage events.
http://hdl.handle.net/10197/6234
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Behaviour of hybrid concrete lattice girder flat slab system using insitu structural health monitoring
(2016)
Newell, S.; Goggins, Jamie; Hajdukiewicz, Magdalena; Holleran, D.
Behaviour of hybrid concrete lattice girder flat slab system using insitu structural health monitoring
(2016)
Newell, S.; Goggins, Jamie; Hajdukiewicz, Magdalena; Holleran, D.
Abstract:
In recent decades, Structural Health Monitoring (SHM) has emerged as an increasingly important tool in Civil Engineering to understand how structures behave during construction and operation. Although SHM is not a new concept, it is only relatively recently that Civil Engineers have adopted SHM for the design, construction and management of civil engineering structures. One of the key benefits of SHM is the improved understanding of insitu structural behaviour. This paper describes the SHM strategy implemented on a recently constructed building to monitor and record the behaviour of a hybrid concrete lattice girder flat slab floor system. Hybrid concrete construction (HCC) combines insitu and precast concrete to maximise the benefits of both forms of construction. HCC offers many advantages for both the designer and contractor and produces simple, buildable and economic structures which can result in faster, safer construction and reduced costs. Sensors were embedded in both the pre...
http://hdl.handle.net/10379/6232
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Behaviour of hybrid concrete lattice girder flat slab system using insitu structural health monitoring
(2016)
Newell, Shane; Goggins, Jamie; Hajdukiewicz, Magdalena; Holleran, Dave
Behaviour of hybrid concrete lattice girder flat slab system using insitu structural health monitoring
(2016)
Newell, Shane; Goggins, Jamie; Hajdukiewicz, Magdalena; Holleran, Dave
Abstract:
In recent decades, Structural Health Monitoring (SHM) has emerged as an increasingly important tool in Civil Engineering to understand how structures behave during construction and operation. Although SHM is not a new concept, it is only relatively recently that Civil Engineers have adopted SHM for the design, construction and management of civil engineering structures. One of the key benefits of SHM is the improved understanding of insitu structural behaviour. This paper describes the SHM strategy implemented on a recently constructed building to monitor and record the behaviour of a hybrid concrete lattice girder flat slab floor system. Hybrid concrete construction (HCC) combines insitu and precast concrete to maximise the benefits of both forms of construction. HCC offers many advantages for both the designer and contractor and produces simple, buildable and economic structures which can result in faster, safer construction and reduced costs. Sensors were embedded in both the pre...
http://hdl.handle.net/10759/620605
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Bridge damage detection using ambient traffic and moving force identification
(2016)
O'Brien, Eugene J.; Carey, Ciaran; Keenahan, Jennifer
Bridge damage detection using ambient traffic and moving force identification
(2016)
O'Brien, Eugene J.; Carey, Ciaran; Keenahan, Jennifer
Abstract:
This paper investigates a novel method for damage detection using a moving force identification algorithm. The method aims to detect the changes in the predicted forces applied by vehicles crossing a bridge, which are shown to be sensitive to damage. A two-dimensional vehicle–bridge interaction model is used in theoretical simulations to assess the effectiveness of the method in detecting changes in stiffness. Fleets of similar vehicles are simulated, and the force pattern of greatest frequency is used as the damage indicator. Results indicate that the method is more sensitive to damage than direct measurements of displacement and can detect a loss in stiffness due to a crack with a depth of as little as 6% of the beam depth.
Irish Research Council
Science Foundation Ireland
http://hdl.handle.net/10197/8046
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Bridge Damage Detection Using Weigh-In-Motion Technology
(2014)
Cantero, Daniel; González, Arturo
Bridge Damage Detection Using Weigh-In-Motion Technology
(2014)
Cantero, Daniel; González, Arturo
Abstract:
This paper proposes a new level I damage detection technique for short to medium span road bridges using weigh-in-motion (WIM) technology. The technique is based on the input provided by two different WIM systems: (a) a pavement-based WIM station located prior to the bridge (which gives vehicle weight estimates without the influence of the bridge) and (b) a bridge-based WIM system which estimates vehicle weights based on the deformation of the bridge. It is shown that the ratio of estimations of vehicle weights by both systems is a reliable and robust indicator of structural integrity even for WIM systems with relatively poor accuracy. Furthermore, this indicator is shown to be more sensitive to damage than the traditional method based on variation in natural frequencies.
http://hdl.handle.net/10197/6218
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Bridge-vehicle interaction for structural health monitoring: potentials, applications, and limitations
(2014)
Jaksic, Vesna
Bridge-vehicle interaction for structural health monitoring: potentials, applications, and limitations
(2014)
Jaksic, Vesna
Abstract:
Structural Health Monitoring (SHM) is an integral part of infrastructure maintenance and management systems due to socio-economic, safety and security reasons. The behaviour of a structure under vibration depends on structure characteristics. The change of structure characteristics may suggest the change in system behaviour due to the presence of damage(s) within. Therefore the consistent, output signal guided, and system dependable markers would be convenient tool for the online monitoring, the maintenance, rehabilitation strategies, and optimized decision making policies as required by the engineers, owners, managers, and the users from both safety and serviceability aspects. SHM has a very significant advantage over traditional investigations where tangible and intangible costs of a very high degree are often incurred due to the disruption of service. Additionally, SHM through bridge-vehicle interaction opens up opportunities for continuous tracking of the condition of the struct...
http://hdl.handle.net/10468/1408
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Bridgemon: Improved monitoring techniques for bridges
(2015)
Favai, Peter; O'Brien, Eugene J.; Znidaric, Ales; et al.
Bridgemon: Improved monitoring techniques for bridges
(2015)
Favai, Peter; O'Brien, Eugene J.; Znidaric, Ales; et al.
Abstract:
Civil Engineering Research in Ireland, Belfast, UK, 28- 29 August, 2014
Many bridges in the world’s transport infrastructure are old and have deteriorated over time. The solution to this problem is to either repair or replace a bridge or to establish its safety and maintain it in service. It is generally very costly to repair or replace a bridge. With reduced maintenance budgets there is an increasing interest in maintaining these old bridges in service by using probabilistic methods to prove that they are safe. Bridge safety is assessed based on (i) the loading which it will experience in service and (ii) the resistance of the structure. Improved knowledge of loading and resistance allows a more accurate assessment of whether a bridge is safe to remain in service without the requirement for expensive repair or replacement strategies. BridgeMon is an EU-FP7 funded project which aims to improve current monitoring techniques for road and rail bridges. This will be done by develop...
http://hdl.handle.net/10197/7014
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Crack detection limits in unit based masonry with terrestrial laser scanning
(2016)
Laefer, Debra F.; Truong-Hong, Linh; Carr, Hamish; Singh, Manmeet
Crack detection limits in unit based masonry with terrestrial laser scanning
(2016)
Laefer, Debra F.; Truong-Hong, Linh; Carr, Hamish; Singh, Manmeet
Abstract:
This paper presents the fundamental mathematics to determine the minimum crack width detectable with a terrestrial laser scanner in unit-based masonry. Orthogonal offset, interval scan angle, crack orientation, and crack depth are the main parameters. The theoretical work is benchmarked against laboratory tests using 4 samples with predesigned crack widths of 1–7 mm scanned at orthogonal distances of 5.0–12.5 m and at angles of 0°–30°. Results showed that absolute errors of crack width were mostly less than 1.37 mm when the orthogonal distance varied 5.0–7.5 m but significantly increased for greater distances. The orthogonal distance had a disproportionately negative effect compared to the scan angle.
European Research Council
Science Foundation Ireland
http://hdl.handle.net/10197/7446
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Damage calibration of a beam using wavelet analysis and image processing
(2006)
Pakrashi, Vikram; O'Connor, Alan J.; Basu, Biswajit
Damage calibration of a beam using wavelet analysis and image processing
(2006)
Pakrashi, Vikram; O'Connor, Alan J.; Basu, Biswajit
Abstract:
Efficient damage detection and calibration of structures have gained great importance in recent times in terms of health monitoring and maintenance programmes. Wavelet analysis based damage detection and calibration from the deflected shape of beams are theoretically known to be a simple and efficient way of assessing damage. However, the measurement of the static or dynamic deflected shape of a vibrating beam is often difficult. The use of sophisticated devices to measure such spatial characteristics suffer from the disadvantage of high cost of the instrument and its unavailability. This paper considers a simply supported aluminium beam with an open crack and presents a video camera based inexpensive laboratory study to assess the damage using wavelet analysis. The vibrating deflected shape recorded by the camera has been processed using image processing methods and an intelligent pattern recognition procedure for the quantification of such the dynamic deflected shape at a particul...
http://hdl.handle.net/10468/259
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Damage Detection by Drive-by Monitoring Using the Vertical Displacements of a Bridge
(2017)
Martinez, Daniel; O'Brien, Eugene J.; Sevillano, Enrique
Damage Detection by Drive-by Monitoring Using the Vertical Displacements of a Bridge
(2017)
Martinez, Daniel; O'Brien, Eugene J.; Sevillano, Enrique
Abstract:
Sixth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2016), Cape Town, South Africa, 5 to 7 September 2016
Drive-by monitoring has received increasing attention in recent years, as it has great potential useful for Structural Health Monitoring (SHM) applications. Although direct instrumentation of civil infrastructures has been demonstrated to be a way of detecting damage, it is also a very expensive method as it requires data acquisition, storage and transmission facilities on each bridge. Drive-by constitutes an alternative that allows the monitoring of a bridge without the necessity of installing sensors on it. In this numerical study, the vertical displacements of the bridge are used for damage detection purposes. The goal of this paper is to describe a model that can reproduce the vertical displacements of the bridge when a simulated vehicle is driving through and show how these displacements change with damage. Vertical displacements ar...
http://hdl.handle.net/10197/8382
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Damage detection in bridges based on patterns of dynamic amplification
(2019)
González, Arturo; Mohammed, Omar
Damage detection in bridges based on patterns of dynamic amplification
(2019)
González, Arturo; Mohammed, Omar
Abstract:
The pattern of Dynamic Amplification Factor (DAF) of the bridge strain response to a moving vehicle versus vehicle velocity is used to develop a level I damage technique. The challenge is to detect damage that causes only a small and difficult to detect frequency change with respect to the healthy condition. For this purpose, a damage index is defined based on subtracting the DAF-velocity pattern for the bridge in a prior healthy state from the DAF-velocity pattern corresponding to the damaged bridge. Simulations from a 3D vehicle-bridge interaction model are employed to show how the index increases with damage. The influence of the location of the strain sensors, the location, and severity of the damage, the road roughness, the corruption of measurements by noise, and the velocity range on the robustness of the technique are analysed. The relative changes in the proposed index as a result of damage are shown to clearly outperform the associated relative changes in frequencies, even...
http://hdl.handle.net/10197/10162
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Damage detection using curvatures obtained from vehicle measurements
(2017)
O'Brien, Eugene J.; Martinez, Daniel; Malekjafarian, Abdollah; Sevillano, Enrique
Damage detection using curvatures obtained from vehicle measurements
(2017)
O'Brien, Eugene J.; Martinez, Daniel; Malekjafarian, Abdollah; Sevillano, Enrique
Abstract:
This paper describes a new procedure for bridge damage identification through drive-by monitoring. Instantaneous curvature (IC) is presented as a means to determine a local loss of stiffness in a bridge through measurements collected from a passing instrumented vehicle. Moving reference curvature (MRC) is compared with IC as a damage detection tool. It is assumed that absolute displacements on the bridge can be measured by the vehicle. The bridge is represented by a finite element (FE) model. A Half-car model is used to represent the passing vehicle. Damage is represented as a local loss of stiffness in different parts of the bridge. 1% random noise and no noise environments are considered to evaluate the effectiveness of the method. A generic road surface profile is also assumed. Numerical simulations show that the local damage can be detected using IC if the deflection responses can be measured with sufficient accuracy. Damage quantification can be obtained from MRC.
European ...
http://hdl.handle.net/10197/8754
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Data of piezoelectric vibration energy harvesting of a bridge undergoing vibration testing and train passage
(2018)
Cahill, Paul; Hazra, Budhaditya; Karoumi, Raid; Mathewson, Alan; Pakrashi, Vikram
Data of piezoelectric vibration energy harvesting of a bridge undergoing vibration testing and train passage
(2018)
Cahill, Paul; Hazra, Budhaditya; Karoumi, Raid; Mathewson, Alan; Pakrashi, Vikram
Abstract:
The data presented in this article is in relation to the research article “Vibration energy harvesting based monitoring of an operational bridge undergoing forced vibration and train passage” Cahill et al. (2018) [1]. The article provides data on the full-scale bridge testing using piezoelectric vibration energy harvesters on Pershagen Bridge, Sweden. The bridge is actively excited via a swept sinusoidal input. During the testing, the bridge remains operational and train passages continue. The test recordings include the voltage responses obtained from the vibration energy harvesters during these tests and train passages. The original dataset is made available to encourage the use of energy harvesting for Structural Health Monitoring.
http://hdl.handle.net/10468/5603
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Development of a Bridge Weigh-in-Motion Sensor: Performance Comparison Using Fiber Optic and Electrical Resistance Strain Sensor Systems
(2015)
Lydon, Myra; Taylor, Su E.; Robinson, Desmond; O'Brien, Eugene J.; et al.
Development of a Bridge Weigh-in-Motion Sensor: Performance Comparison Using Fiber Optic and Electrical Resistance Strain Sensor Systems
(2015)
Lydon, Myra; Taylor, Su E.; Robinson, Desmond; O'Brien, Eugene J.; et al.
Abstract:
This paper addresses the problems of effective in situ measurement of the real-time strain for bridge weigh in motion in reinforced concrete bridge structures through the use of optical fiber sensor systems. By undertaking a series of tests, coupled with dynamic loading, the performance of fiber Bragg grating-based sensor systems with various amplification techniques were investigated. In recent years, structural health monitoring (SHM) systems have been developed to monitor bridge deterioration, to assess load levels and hence extend bridge life and safety. Conventional SHM systems, based on measuring strain, can be used to improve knowledge of the bridge's capacity to resist loads but generally give no information on the causes of any increase in stresses. Therefore, it is necessary to find accurate sensors capable of capturing peak strains under dynamic load and suitable methods for attaching these strain sensors to existing and new bridge structures. Additionally, it is imp...
http://hdl.handle.net/10197/7070
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