All Outputs (39)

A framework for assessing the value of information for health monitoring of scoured bridges (2020)
Journal Article
Limongelli, M. P., Giordano, P. F., & Prendergast, L. (2020). A framework for assessing the value of information for health monitoring of scoured bridges. Journal of Civil Structural Health Monitoring, 10, https://doi.org/10.1007/s13349-020-00398-0

© 2020, Springer-Verlag GmbH Germany, part of Springer Nature. It is generally accepted that climate change is leading to increased frequency of extreme weather events worldwide, and this is placing heavier demands on an already aging infrastructure-... Read More about A framework for assessing the value of information for health monitoring of scoured bridges.

Influence of scour depth and type on p–y curves for monopiles in sand under monotonic lateral loading in a geotechnical centrifuge (2020)
Journal Article
Chortis, G., Askarinejad, A., Prendergast, L., Li, Q., & Gavin, K. (2020). Influence of scour depth and type on p–y curves for monopiles in sand under monotonic lateral loading in a geotechnical centrifuge. Ocean Engineering, 197, Article 106838. https://doi.org/10.1016/j.oceaneng.2019.106838

The influence of scour on the lateral response of monopile foundations for offshore wind turbines is investigated in this paper. Application of lateral load-displacement (p-y) curves to predict the lateral pile behaviour is subject to uncertainty as... Read More about Influence of scour depth and type on p–y curves for monopiles in sand under monotonic lateral loading in a geotechnical centrifuge.

Centrifuge modeling of the impact of local and global scour erosion on the monotonic lateral response of a monopile in sand (2020)
Journal Article
Li, Q., Li, Q., Prendergast, L. J., Askarinejad, A., Chortis, G., & Gavin, K. (2020). Centrifuge modeling of the impact of local and global scour erosion on the monotonic lateral response of a monopile in sand. Geotechnical Testing Journal, 43(5), 20180322. https://doi.org/10.1520/GTJ20180322

Copyright © 2020 by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. The majority of offshore wind turbines are founded on large-diameter, open-ended steel monopiles. Monopiles must resist lateral loads and ov... Read More about Centrifuge modeling of the impact of local and global scour erosion on the monotonic lateral response of a monopile in sand.

Use of mode shape ratios for pier scour monitoring in two-span integral bridges under changing environmental conditions (2019)
Journal Article
Malekjafarian, A., Prendergast, L., & OBrien, E. J. (2020). Use of mode shape ratios for pier scour monitoring in two-span integral bridges under changing environmental conditions. Canadian Journal of Civil Engineering, 47(8), 962-973. https://doi.org/10.1139/cjce-2018-0800

In this paper, a novel pier scour indicator is introduced, which uses the ratio between mode shape amplitudes identified at two points on an integral bridge structure to monitor the progression of scour erosion. The Mode Shape Ratio (MSR) is investig... Read More about Use of mode shape ratios for pier scour monitoring in two-span integral bridges under changing environmental conditions.

Scour damage detection and structural health monitoring of a laboratory-scaled bridge using a vibration energy harvesting device (2019)
Journal Article
Fitzgerald, P., Malekjafarian, A., Bhowmik, B., Prendergast, L., Cahill, P., Kim, C., …Obrien, E. (2019). Scour damage detection and structural health monitoring of a laboratory-scaled bridge using a vibration energy harvesting device. Sensors, 19(11), 21. https://doi.org/10.3390/s19112572

A vibration-based bridge scour detection procedure using a cantilever-based piezoelectric energy harvesting device (EHD) is proposed here. This has an advantage over an accelerometer-based method in that potentially, the requirement for a power sourc... Read More about Scour damage detection and structural health monitoring of a laboratory-scaled bridge using a vibration energy harvesting device.

Experimental application of FRF-based model updating approach to estimate soil mass and stiffness mobilised under pile impact tests (2019)
Journal Article
Prendergast, L., Wu, W., & Gavin, K. (2019). Experimental application of FRF-based model updating approach to estimate soil mass and stiffness mobilised under pile impact tests. Soil Dynamics and Earthquake Engineering, 123, 1-15. https://doi.org/10.1016/j.soildyn.2019.04.027

The dynamic response of structures in contact with soil is receiving increasing interest and there is a growing need for more accurate models capable of simulating the behaviour of these systems. This is particularly important in the field of offshor... Read More about Experimental application of FRF-based model updating approach to estimate soil mass and stiffness mobilised under pile impact tests.

Drive-by scour monitoring of railway bridges using a wavelet-based approach (2019)
Journal Article
Fitzgerald, P. C., Malekjafarian, A., Cantero, D., OBrien, E. J., & Prendergast, L. J. (2019). Drive-by scour monitoring of railway bridges using a wavelet-based approach. Engineering Structures, 191, 1-11. https://doi.org/10.1016/j.engstruct.2019.04.046

This paper numerically investigates the feasibility of using bogie acceleration measurements from a passing train to detect the presence of bridge scour. The Continuous Wavelet Transform is used to process the simulated acceleration measurements for... Read More about Drive-by scour monitoring of railway bridges using a wavelet-based approach.

Recent development and remaining challenges in determining unique bridge scour performance indicators (2018)
Journal Article
PRENDERGAST, L., GAVIN, K., STIPANOVIC, I., & SKARIC-PALIC, S. (2018). Recent development and remaining challenges in determining unique bridge scour performance indicators. Baltic Journal of Road and Bridge Engineering, 13(3), 291-300. https://doi.org/10.7250/bjrbe.2018-13.417

There have been significant developments in the area of vibration based bridge scour monitoring in recent years. Traditional scour monitoring using either visual assessment or diving inspections are now recognised to be very unreliable and highly sub... Read More about Recent development and remaining challenges in determining unique bridge scour performance indicators.

Performance of CPT-based methods to assess monopile driveability in North Sea sands (2018)
Journal Article
Byrne, T., Gavin, K., Prendergast, L., Cachim, P., Doherty, P., & Chenicheri Pulukul, S. (2018). Performance of CPT-based methods to assess monopile driveability in North Sea sands. Ocean Engineering, 166, 76-91. https://doi.org/10.1016/j.oceaneng.2018.08.010

Offshore pile driving is a high-risk activity as delays can be financially punitive. Experience of pile driving for offshore jacket structures where pile diameters are typically < 2 m has led to the development of empirical pile driveability models w... Read More about Performance of CPT-based methods to assess monopile driveability in North Sea sands.

Structural health monitoring for performance assessment of bridges under flooding and seismic actions (2018)
Journal Article
Prendergast, L. J., Limongelli, M. P., Ademovic, N., Anžlin, A., Gavin, K., & Zanini, M. (2018). Structural health monitoring for performance assessment of bridges under flooding and seismic actions. Structural Engineering International, 28(3), 296-307. https://doi.org/10.1080/10168664.2018.1472534

Bridges can be subjected to damaging environmental actions due to flooding and seismic hazards. Flood actions that result in scour are a leading cause of bridge failure, while seismic actions that induce lateral forces may lead to high ductility dema... Read More about Structural health monitoring for performance assessment of bridges under flooding and seismic actions.

An iterative method to infer distributed mass and stiffness profiles for use in reference dynamic beam-Winkler models of foundation piles from frequency response functions (2018)
Journal Article
Wu, W., Prendergast, L., & Gavin, K. (2018). An iterative method to infer distributed mass and stiffness profiles for use in reference dynamic beam-Winkler models of foundation piles from frequency response functions. Journal of Sound and Vibration, 431, 1-19. https://doi.org/10.1016/j.jsv.2018.05.049

Accurate characterisation of soil behaviour in Dynamic-Soil-Structure Interaction (DSSI) applications remains a significant challenge. Knowledge of the operational soil-structure interaction stiffness is important for applications ranging from earthq... Read More about An iterative method to infer distributed mass and stiffness profiles for use in reference dynamic beam-Winkler models of foundation piles from frequency response functions.

Probabilistic examination of the change in eigenfrequencies of an offshore wind turbine under progressive scour incorporating soil spatial variability (2017)
Journal Article
Prendergast, L., Reale, C., & Gavin, K. (2018). Probabilistic examination of the change in eigenfrequencies of an offshore wind turbine under progressive scour incorporating soil spatial variability. Marine Structures, 57, (87-104). doi:10.1016/j.marstruc.2017.09.009. ISSN 0951-8339

The trend for development in the offshore wind sector is towards larger turbines in deeper water. This results in higher wind and wave loads on these dynamically sensitive structures. Monopiles are the preferred foundation solution for offshore wind... Read More about Probabilistic examination of the change in eigenfrequencies of an offshore wind turbine under progressive scour incorporating soil spatial variability.

Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour (2017)
Journal Article
Prendergast, L. J., Gavin, K., & Hester, D. (2017). Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour. Journal of Civil Structural Health Monitoring, 7(4), 483-503. https://doi.org/10.1007/s13349-017-0238-3

Detecting scour by analysing bridge vibrations is receiving an increasing amount of attention in the literature. Others have considered changes in natural frequency to indicate the presence of scour damage; however, little work has been reported on i... Read More about Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour.

Development of a vehicle-bridge-soil dynamic interaction model for scour damage modelling (2016)
Journal Article
Prendergast, L. J., Hester, D., & Gavin, K. (2016). Development of a vehicle-bridge-soil dynamic interaction model for scour damage modelling. Shock and Vibration, 2016, 1-15. https://doi.org/10.1155/2016/7871089

Damage detection in bridges using vibration-based methods is an area of growing research interest. Improved assessment methodologies combined with state-of-the-art sensor technology are rapidly making these approaches applicable for real-world stru... Read More about Development of a vehicle-bridge-soil dynamic interaction model for scour damage modelling.

Determining the presence of scour around bridge foundations using vehicle-induced vibrations (2016)
Journal Article
Prendergast, L. J., Hester, D., & Gavin, K. (2016). Determining the presence of scour around bridge foundations using vehicle-induced vibrations. Journal of Bridge Engineering, 21(10), Article 04016065. https://doi.org/10.1061/%28asce%29be.1943-5592.0000931

Bridge scour is the number one cause of failure in bridges located over waterways. Scour leads to rapid losses in foundation stiffness and can cause sudden collapse. Previous research on bridge health monitoring has used changes in natural frequency... Read More about Determining the presence of scour around bridge foundations using vehicle-induced vibrations.

A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling (2015)
Journal Article
Prendergast, L., & Gavin, K. (2016). A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling. Soil Dynamics and Earthquake Engineering, 81, 27-41. https://doi.org/10.1016/j.soildyn.2015.11.006

Dynamic Soil-Structure Interaction (DSSI) is an area of much ongoing research and has wide and varied applications from seismic response analysis to offshore wind foundation response. DSSI covers a wide range of load regimes from small-strain vibrati... Read More about A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling.

An investigation into the effect of scour on the natural frequency of an offshore wind turbine (2015)
Journal Article
Prendergast, L., Gavin, K., & Doherty, P. (2015). An investigation into the effect of scour on the natural frequency of an offshore wind turbine. Ocean Engineering, 101, (1-11). doi:10.1016/j.oceaneng.2015.04.017. ISSN 0029-8018

Rapid expansion of the offshore wind industry has stimulated a renewed interest in the behaviour of offshore piles. There is widespread acceptance in practice that pile design methods developed for the offshore oil and gas industry may not be appropr... Read More about An investigation into the effect of scour on the natural frequency of an offshore wind turbine.

A review of bridge scour monitoring techniques (2014)
Journal Article
Prendergast, L., & Gavin, K. (2014). A review of bridge scour monitoring techniques. Journal of Rock Mechanics and Geotechnical Engineering, 6(2), (138-149). doi:10.1016/j.jrmge.2014.01.007

The high profile failure of the Malahide Viaduct in Dublin, Ireland, which is a part of the EU TEN-T network of critical transport links, was caused by foundation scour. Scour is a common soil-structure interaction problem. In light of current change... Read More about A review of bridge scour monitoring techniques.

An investigation of the changes in the natural frequency of a pile affected by scour (2013)
Journal Article
Prendergast, L., Hester, D., Gavin, K., & O’Sullivan, J. (2013). An investigation of the changes in the natural frequency of a pile affected by scour. Journal of Sound and Vibration, 332(25), 6685-6702. https://doi.org/10.1016/j.jsv.2013.08.020

Scour around bridge foundations is one of the leading causes of bridge failure. Up until recently, the monitoring of this phenomenon was primarily based around using underwater instrumentation to monitor the progression of scour holes as they develop... Read More about An investigation of the changes in the natural frequency of a pile affected by scour.