Implications of subsoil-foundation modelling on the dynamic characteristics of a monitored bridge

Faraonis, Periklis; Sextos, Anastasios; Papadimitriou, Costas; Chatzi, Eleni; Panetsos, Panagiotis

doi:10.1080/15732479.2018.1503689

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…Such methods can be extended to directly identify structural properties using a second stage of model updating, where numerical structural model parameters are optimised to best match the predicted and measured modal behaviour. Whilst model updating has been used successfully to identify foundation properties in applications such as bridge, breakwater, and axial pile analyses [7][8][9], challenges in validating measurements, due to a lack of accurate modelling or benchmark data, have prevented implementation in directly estimating OWT foundation properties from monitored data. Whilst Anderson [10] investigated the components of a framework for OWT foundation parameter estimation, this was explored only through numerical simulation and applied to synthetically generated data.…”

Section: Introductionmentioning

confidence: 99%

Monopile Foundation Stiffness Estimation of an Instrumented Offshore Wind Turbine through Model Updating

McAdam,

Chatzis,

Kuleli

et al. 2023

Structural Control and Health Monitoring

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Rapid development of offshore wind foundation models has resulted in a large number of built structures with generally underestimated foundation stiffness properties and a need to update and validate both the individual structural models and the underlying foundation design frameworks. This paper outlines a structural health monitoring approach, based on the combination of output only structural health monitoring methods and model updating, to estimate foundation stiffness parameters using field monitored data. Field monitoring data from an offshore wind turbine under idling conditions, over a large monitoring period, are presented and operational modal analysis is applied to estimate the modal parameters. Those are compared to modal properties predicted by finite element models, employing either old (API/DNVGL) or new (PISA) foundation design properties, which are calibrated using geotechnical site investigation data. A new approach to interpret seabed level statically equivalent foundation stiffness, in terms of effective lateral and rotational stiffness against load eccentricity, is presented. Seabed level statically equivalent foundation properties are updated by comparison against the observed modal behaviour and the optimised foundation parameters are presented, demonstrating a close match to the predictions of the PISA method.

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Section: Introductionmentioning

confidence: 99%

Monopile Foundation Stiffness Estimation of an Instrumented Offshore Wind Turbine through Model Updating

McAdam,

Chatzis,

Kuleli

et al. 2023

Structural Control and Health Monitoring

View full text Add to dashboard Cite

show abstract

“…However, Mylonakis et al (2006a), Kappos & Sextos (2009) and Zheng et al (2015) found a non-negligible contribution of SSI towards inelastic structural seismic demand. Chaudhary (2017bChaudhary ( , 2018 and Faraonis et al (2019) noted that impact of SSI on structural performance and modal parameters was related to the relative stiffness of pier columns and soil-foundation system instead of properties of the supporting soil alone.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of modal parameters of multi-span bridges to SSI and pier column inelasticity and its implications for FEM model updating

Chaudhary

2020

Lat. Am. j. solids struct.

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Modal parameters, determined through forced vibration testing, ambient vibrations or seismic excitations, are central to the structural health monitoring process for bridges. These parameters are used to obtain highfidelity numerical models through FEM model updating by fine-tuning mass, stiffness and boundary conditions and matching the numerical and observed modal parameters. This study investigated sensitivity of modal parameters to changes in boundary conditions (soil-structure interaction effect) and pier column inelasticity (stiffness effect) through more than 450 non-linear dynamic time-history analysis of an ordinary multi-span bridge. The bridge system was founded on shallow foundations in five rock profiles and on pile foundations in five soil profiles and was subjected to 21 seismic ground motions of varying intensity (0.036 to 0.61g). Modal frequencies showed sensitivity to the SSI and pier column inelasticity effects for low and higher levels of seismic excitations respectively. Mode shapes, on the contrary, were insensitive to SSI as well as pier column inelasticity for all levels of seismic excitations.

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Sensitivity of seismic response of pile-supported, multi-span viaduct bridges to interaction between soil-foundation and structural parameters

Chaudhary

2023

Innov. Infrastruct. Solut.

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Implications of subsoil-foundation modelling on the dynamic characteristics of a monitored bridge

Abstract: Implications of subsoil-foundation stiffness on the dynamic characteristics of a monitored bridge

Cited by 4 publications

References 42 publications

Monopile Foundation Stiffness Estimation of an Instrumented Offshore Wind Turbine through Model Updating

Monopile Foundation Stiffness Estimation of an Instrumented Offshore Wind Turbine through Model Updating

Sensitivity of modal parameters of multi-span bridges to SSI and pier column inelasticity and its implications for FEM model updating

Sensitivity of seismic response of pile-supported, multi-span viaduct bridges to interaction between soil-foundation and structural parameters

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