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Tott-Buswell, Jacques (author), Prendergast, Luke J. (author), Gavin, Kenneth (author)Monopiles are the most common Offshore Wind Turbine (OWT) foundations due to their simplicity in design, fabrication, and installation. However, large new-generation turbines have led to significant changes in monopile dimensions, necessitating extensive finite element analyses and ground investigations to meet design requirements. While Cone...journal article 2024
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Li, Q. (author), Prendergast, L. J. (author), Gavin, Kenneth (author), Askarinejad, A. (author), Wang, X. Q. (author)To mitigate against scour hole formation, scour protection can be placed around offshore wind turbine monopiles. Few studies have considered the beneficial effect of this geotechnical reinforcement measure on the foundation lateral resistance. The contribution of scour protection to lateral resistance of monopiles in sand is investigated in...journal article 2024
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Li, Q. (author), Gavin, Kenneth (author), Askarinejad, A. (author), Prendergast, L. J. (author)The influence of combined loading on the response of monopiles used to support offshore wind turbines (OWTs) is investigated in this paper. In current practice, resistance of monopiles to vertical and lateral loading is considered separately. As OWT size has increased, the slenderness ratio (pile length, L, normalised by diameter, D) has...journal article 2022
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Li, Q (author), Prendergast, L. J. (author), Askarinejad, A. (author), Chortis, G. (author), Gavin, Kenneth (author)The majority of offshore wind turbines are founded on large-diameter, open-ended steel monopiles. Monopiles must resist lateral loads and overturning moments because of environmental (wind and wave) actions, whereas vertical loads tend to be comparatively small. Recent developments in turbine sizes and increases in hub heights have resulted...journal article 2020
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Chortis, G. (author), Askarinejad, A. (author), Prendergast, L.J. (author), Li, Q. (author), Gavin, Kenneth (author)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 many of the presently used design approaches have been derived for long, slender piles. These...journal article 2020
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Li, Q. (author), Prendergast, Luke J. (author), Askarinejad, A. (author), Gavin, Kenneth (author)The majority of installed offshore wind turbines are supported on large-diameter, open-ended steel pile foundations, known as monopiles. These piles are subjected to vertical and lateral loads while in service. In current design practice, interaction of vertical and lateral loads are not considered, rather piles are designed to resist...review 2020
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Prendergast, Luke J. (author), Gandina, Putri (author), Gavin, Kenneth (author)This paper investigates the applicability of Cone Penetration Test (CPT)-based axial capacity approaches, used for estimating pile static capacity, to the prediction of pile driveability. An investigation of the influence of various operational parameters in a driveability study is conducted. A variety of axial capacity approaches (IC-05, UWA...journal article 2020
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Prendergast, L. J. (author), Wu, W. H. (author), Gavin, Kenneth (author)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 offshore wind turbines, where accurate estimates of system frequency are needed to avoid resonance, and...journal article 2019
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Byrne, T. (author), Gavin, Kenneth (author), Prendergast, L.J. (author), Cachim, P. (author), Doherty, P. (author), Chenicheri Pulukul, S. (author)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 with proven predictive capability. The application of these methods to larger diameter piles...journal article 2018
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Wu, W. H. (author), Prendergast, L.J. (author), Gavin, Kenneth (author)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 earthquake engineering to offshore structures subjected to wind and wave loading. A number of...journal article 2018
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Li, Q. (author), Prendergast, L.J. (author), Askarinejad, A. (author), Gavin, Kenneth (author)Pile foundations used for offshore wind structures are subjected to large lateral loading from wind and waves while in service as well as significant vertical loading from the top structure. Erosion of soil from around these structures, termed scour, poses a significant problem for the structural stability. In order to better understand the...conference paper 2018
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Prendergast, L.J. (author), Ademovic, Naida (author), Limongelli, Maria Pina (author), Gavin, Kenneth (author), Zanini, Mariano (author), Faleschini, Flora (author)In infrastructural networks, bridges can be considered key elements and their functionality must be preserved. Floods (leading to scour erosion) and earthquakes could be considered among the most critical natural events that may become more frequent with climate change, causing significant damage to bridges. Several regions in Europe have both...conference paper 2018
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Prendergast, L.J. (author), Gavin, Kenneth (author)Soil supporting foundations for infrastructural assets such as bridges are repeatedly subjected to dynamic loading from passing traffic. The load-displacement characteristics are nonlinear at even small to medium strains, however this effect is mostly modelled using secant stiffness models with effective linear stiffness. This simplification...conference paper 2018
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Prendergast, L.J. (author), Reale, C. (author), Gavin, Kenneth (author)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 structures and have a typical expected design life of 20 years. These foundations have strict...journal article 2018
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Gavin, Kenneth (author), Prendergast, L.J. (author), Stipanovič, Irina (author), Škarič−palič, Sandra (author)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 subjective. There has been a concerted effort to move towards reliable systems capable of either...journal article 2018
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Prendergast, L.J. (author), Limongelli, Maria P. (author), Ademovic, Naida (author), Anžlin, Andrej (author), Gavin, Kenneth (author), Zaninil.j.prendergast@tudelft.nl, Mariano (author)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 demand that exceeds pier capacity. When combined, seismic actions and scour can lead to effects...journal article 2018
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Prendergast, L.J. (author), Gavin, Kenneth (author), Hester, David (author)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 identifying the location of a scour hole based on vibration measurements. In this paper, a...journal article 2017
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Attari, Y. (author), Prendergast, Luke (author), Gavin, Kenneth (author)In recent years, the international demand to produce green energy has been growing to address the issues of energy security and climate change. To date, wind technology has presented most maturity due to high availability of wind resources. Erecting wind turbines offshore, however, presents significant new engineering challenges. Offshore...conference paper 2016
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Prendergast, Luke (author), Gavin, Kenneth (author), Hester, David (author)Vibration-based Structural Health Monitoring (SHM) is an area of ongoing research and has received much attention from researchers in recent years. Online damage detection methods for bridges rely on placing sensors on the structure to detect anomalies in measured parameters such as acceleration, frequency or displacement among others. Changes...conference paper 2016