Searched for: author%3A%22Lourens%2C+E.%22
(1 - 11 of 11)
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Petersen, Oyvind W. (author), Øiseth, Ole (author), Lourens, E. (author)
An application of inverse force identification of wind loads on bridges is presented. This contribution explores the extension of latent force models (LFMs) in Kalman filters. Specifically, it is shown how LFMs can be enriched with environmental information from wind data in order to realistically reflect the underlying physics behind the wind...
conference paper 2022
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Petersen, W. (author), Øiseth, O. (author), Lourens, E. (author)
Wind loading is an essential aspect in the design and assessment of long-span bridges, but it is often not well-known and cannot be measured directly. Most structural health monitoring systems can easily measure structural responses at discrete locations using accelerometers. This data can be combined with reduced-order modal models in Kalman...
journal article 2022
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Petersen, W. (author), Øiseth, O. (author), Lourens, E. (author)
The traditional wind load assessment for long-span bridges relies on assumed models for the wind field and aerodynamic coefficients from wind tunnel tests, which usually introduce some uncertainties. Recent studies have shown that large deviations can exist between the predicted and observed wind-induced dynamic response of suspension bridges...
journal article 2020
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Petersen, Oyvind W. (author), Øiseth, Ole (author), Nord, Torodd Skjerve (author), Lourens, E. (author)
The traditional wind load assessment for long-span bridges rely on assumed models for the wind field and aerodynamic coefficients from wind tunnel tests, which usually introduces some uncertainties. It is therefore desired to develop tools that can utilize full-scale vibration response data from existing bridges in order to study the wind...
conference paper 2019
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Petersen, Øyvind Wiig (author), Øiseth, Ole (author), Lourens, E. (author)
The dynamic behaviour of long-span bridges is governed by stochastic loads from typically ambient excitation sources. In real life, these loads cannot be measured directly at full scale. However, inverse methods can be utilised to identify these unknown forces using response measurements together with a numerical model of the relevant...
journal article 2019
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Petersen, Oyvind W. (author), Øiseth, Ole (author), Nord, Torodd S. (author), Lourens, E. (author)
Numerical predictions of the dynamic response of complex structures are often uncertain due to uncertainties inherited from the assumed load effects. Inverse methods can estimate the true dynamic response of a structure through system inversion, combining measured acceleration data with a system model. This article presents a case study of...
journal article 2018
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Petersen, Øyvind Wiig (author), Oiseth, Ole (author), Lourens, E. (author)
Structural health monitoring (SHM) seeks to assess the condition or behaviour of the structure from measurement data, which for long-span bridges typically are wind velocities and/or structural vibrations. However, in the assessment of the wind-induced response effects, models for the actual loads must be adopted, which introduces uncertainties....
journal article 2018
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Petersen, Øyvind Wiig (author), Øiseth, Ole (author), Lourens, E. (author)
Knowledge of the ambient loads are important for assessing the dynamic behavior of long-span bridges. However, the assumptions in the adopted load models used in the dynamic analysis leads to uncertainties in e.g. reliability assessments. To reduce the uncertainties, full-scale studies of the loads on existing structures can be performed....
conference paper 2018
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Nord, Torodd S. (author), Kvåle, Knut Andreas (author), Petersen, Oyvind W. (author), Bjerkås, Morten (author), Lourens, E. (author)
The sea ice interaction with a structure may cause system changes and affect the feasibility of common approaches to track modal parameters. In this paper, a covariance-driven stochastic subspace identification method is used to identify the natural frequencies from 190 time series of ice actions against a lighthouse structure. The results...
conference paper 2017
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Petersen, Øyvind Wiig (author), Øiseth, Ole (author), Lourens, E. (author)
Suspension bridges with very long spans and slender designs are susceptible to large-amplitude dynamic excitation. Monitoring systems installed on bridges can provide measurement data (e.g. accelerations) and therewith valuable information on the true dynamic behaviour. This pilot study examines the possible use of recently developed methods...
conference paper 2017
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Petersen, Øyvind Wiig (author), Øiseth, Ole (author), Nord, Torodd Skjerve (author), Lourens, E. (author)
The Norwegian Public Roads Administration is reviewing the possibility of using floating bridges as fjord crossings. The dynamic behaviour of very long floating bridges with novel designs are prone to uncertainties. Studying the dynamic behaviour of existing bridges is valuable for understanding the in-situ performance. We present a case...
conference paper 2016
Searched for: author%3A%22Lourens%2C+E.%22
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