Influence of Foundation Scour on the Dynamic Response of an Existing Bridge

Foti, Sebastiano; Sabia, Donato

doi:10.1061/(asce)be.1943-5592.0000146

Cited by 108 publications

(72 citation statements)

References 11 publications

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“…In the case of bridges, most of the work to date has focused on monitoring the superstructure. More recent research has begun to focus on using these damage SoftSoft detection methodologies on sub-structural elements (see [5][6][7]). In these cases, the analyses can be quite sensitive to the soil stiffness assumed in the design where the dynamic oscillations typically remain in the small-strain region.…”

Section: Dynamic Soil-structure Interaction (Dssi)mentioning

confidence: 99%

A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling

Prendergast

Gavin

2016

Soil Dynamics and Earthquake Engineering

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Section: Dynamic Soil-structure Interaction (Dssi)mentioning

confidence: 99%

A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling

Prendergast

Gavin

2016

Soil Dynamics and Earthquake Engineering

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“…These methods rely on the well-established statistical concepts instead of human expertise to extract features that change with the onset of damage [37], which eliminates possible individual biases and requires very few assumptions regarding the physical structure. This method is represented by the Auto-Regressive (AR) family method such as the AR or Auto-Regressive Moving Average (ARMA) models [37][38][39][40], AR model with exogenous inputs (ARX) [41,42], Auto-Regressive Moving Average Vector (ARMAV) model [43], vector autoregressive (ARV) models [44], and the time frequency autoregressive moving average (TFARMA) model [45]. The ARMA or other similar models are used to model the time-domain vibration signals obtained from the structure, and then the model coefficients estimated using statistical methods are used to identify the system dynamic parameters and to extract features that indicate the damage occurrence.…”

Section: Data-based Statistical Methodsmentioning

confidence: 99%

The State-of-the-Art on Framework of Vibration-Based Structural Damage Identification for Decision Making

2017

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Abstract:Research on detecting structural damage at the earliest possible stage has been an interesting topic for decades. Among them, the vibration-based damage detection method as a global technique is especially pervasive. The present study reviewed the state-of-the-art on the framework of vibration-based damage identification in different levels including the prediction of the remaining useful life of structures and the decision making for proper actions. This framework consists of several major parts including the detection of damage occurrence using response-based methods, building reasonable structural models, selecting damage parameters and constructing objective functions with sensitivity analysis, adopting optimization techniques to solve the problem, predicting the remaining useful life of structures, and making decisions for the next actions. For each part, the commonly used methods were reviewed and the merits and drawbacks were summarized to give recommendations. This framework is aimed to guide the researchers and engineers to implement step by step the structure damage identification using vibration measurements. Finally, the future research work in this field is recommended.

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“…Moreover, they suggest a method for creating soil-springs using correlations to geotechnical site data such as shearwave velocities and cone penetration tests. Foti and Sabia [19] describe an investigation carried out on a five-span bridge adversely affected by scour during a major flood. Prior to a planned retrofit, one of the pier responses was monitored to ascertain if scour could be detected by utilising the asymmetric (rigid-body) dynamic behaviour of the pier and analysing foundation acceleration signals.…”

Section: Indirect Monitoring Of Bridge Scour By Identifying Changes Imentioning

confidence: 99%

“…The work of authors [6,[14][15][16][17][18][19][20] shows that there is a general agreement that changes in natural frequency offer potential as a method to remotely detect and monitor the presence of scour around a foundation element. However, to date no research has been undertaken into using changes in natural frequency as a method to locate a scour hole (i.e.…”

Section: Overview Of Current Studymentioning

confidence: 99%

Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour

Prendergast

Gavin

Hester

2017

J Civil Struct Health Monit

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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 numerical study is carried out using a bespoke vehiclebridge-soil dynamic interaction model to examine how the first six vibration modes (Eigen frequencies) of a typical integral bridge are affected by scour at different locations. It is found that depending on the location of the scour hole, some modes are much more affected than others in terms of frequency changes. In fact, a clear pattern emerges as to which modes are affected by which scour location. Using this knowledge, the location of a scour hole can potentially be detected on a real bridge. However, recognising that it is not possible to undertake an eigenvalue analysis on an actual bridge, an analysis is performed by collecting acceleration signals from various points on the structure. The bridge is loaded by a realistic vehicle model, incorporating vehicle-bridge interaction effects, which leads to the generation of discrete acceleration signals at various 'sensor' locations on the bridge. In this paper, it is found that it is possible to detect the location of a scour hole using a relatively small number of 'sensors'. However, to achieve this, careful signal processing is necessary and advice on a number of pertinent issues is provided.

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Influence of Foundation Scour on the Dynamic Response of an Existing Bridge

Cited by 108 publications

References 11 publications

A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling

A comparison of initial stiffness formulations for small-strain soil–pile dynamic Winkler modelling

The State-of-the-Art on Framework of Vibration-Based Structural Damage Identification for Decision Making

Isolating the location of scour-induced stiffness loss in bridges using local modal behaviour

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