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Ian Smith

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Publications associées (221)

Damage detection using data-driven methods applied to moving-load responses

Ian Smith

Developed economies depend on complex and extensive systems of infrastructure to maintain economic prosperity and quality of life. In recent years, the implementation of Structural health monitoring (SHM) systems on full-scale bridges has increased. The go ...

Elsevier2013

Hybrid probabilities and error-domain structural identification using ambient vibration monitoring

Ian Smith, Clotaire Michel, James-Alexandre Goulet

For the assessment of structural behaviour, many approaches are available to compare model predictions with measurements. However, few approaches include uncertainties along with dependencies associated with models and observations. In this paper, an error ...

Elsevier2013

Temperature Variations as Loads Cases for Structural Identification

Ian Smith, Irwanda Laory

2013

Detecting leak regions through model falsification

Ian Smith, Gaudenz Moser

Pressurized fluid-distribution networks are strategic elements of infrastructure. In the case of fresh-water distribution networks, advanced sensor-based diagnostic methodologies have the potential to provide enhanced management support. Since a significan ...

2013

Evaluating modeling uncertainties in the simulation of airflow in cities

Ian Smith, Didier Vernay

Even though computational fluid-dynamics (CFD) has been used to simulate airflow in cities, accurate results are not always obtained because of difficulties related to defining the correct set of values of parameters, including boundary conditions. This pa ...

2013

Performance-Driven Measurement System Design for Structural Identification

Ian Smith, James-Alexandre Goulet

Much progress has been achieved in the research field of structural identification, which is attributable to a better understanding of uncertainties, improvement in sensor technologies, and cost reductions. However, data interpretation remains a bottleneck ...

American Society of Civil Engineers2013

Combined Model-Free Data-Interpretation Methodologies for Damage Detection during Continuous Monitoring of Structures

Ian Smith, Daniele Posenato, Irwanda Laory, Ngoc Thanh Trinh

Despite the recent advances in sensor technologies and data-acquisition systems, interpreting measurement data for structural monitoring remains a challenge. Furthermore, because of the complexity of the structures, materials used, and uncertain environmen ...

American Society of Civil Engineers2013

Improving Remaining-Fatigue-Life Evaluation Using Data Interpretation

Ian Smith, Romain Pasquier, Yves Sylvain Gilles Reuland

This paper presents a methodology that improves fatigue-performance evaluations using model-based data interpretation. The accuracy of stress-range values is essential for quantifying fatigue damage. These values are usually predicted using physics-based m ...

2013

Model falsification diagnosis and sensor placement for leak detection in pressurized pipe networks

Ian Smith, James-Alexandre Goulet, Sylvain Coutu

Pressurized pipe networks used for fresh-water distribution can take advantage of recent advances in sensing technologies and data-interpretation to evaluate their performance. In this paper, a leak-detection and a sensor placement methodology are proposed ...

Elsevier2013

Structural identification with systematic errors and unknown uncertainty dependencies

Ian Smith, James-Alexandre Goulet

When system identification methodologies are used to interpret measurement data taken from structures, uncertainty dependencies are in many cases unknown due to model simplifications and omissions. This paper presents how error-domain model falsification r ...

Elsevier2013

Predicting the Usefulness of Monitoring for Identifying the Behavior of Structures

Ian Smith, James-Alexandre Goulet

Structures can be better understood when measurement data are used to improve the modeling of structural behavior. Our capacity to interpret data depends on aspects such as the choice of model class, model parameters (and their range of possible values), a ...

American Society of Civil Engineers2013

Model-Based Data Interpretation and Diagnosis Robustness

Ian Smith, Romain Pasquier, James-Alexandre Goulet

Model-based data-interpretation techniques are widely used to identify the behavior of structures. These techniques exploit information provided by in-situ measurements to make diagnosis related to structural performance. In the context of model-based infr ...

Taylor & Francis Group2013

Structural identification methods for full-scale bridges

Ian Smith, James-Alexandre Goulet, Irwanda Laory

Results of two doctoral theses, one using a model-based approach and the other using model-free methods, are summarized. Both included case studies of full-scale bridges. While model-based approaches are appropriate for individual infrastructure-management ...

2013

Mechanism-Based Approach for the Deployment of a Tensegrity-Ring Module

Ian Smith, Landolf-Giosef-Anastasios Rhode-Barbarigos, René Motro, Costanza Schulin, Nizar Bel Hadj Ali

Tensegrity structures are spatial systems composed of tension and compression components in a self-equilibrated prestress stable state. Although the concept is over 60 years old, few tensegrity-based structures have been used for engineering purposes. Tens ...

2012

A model-free data-interpretation approach for long-term monitoring of bridges

Ian Smith, Irwanda Laory, Ngoc Thanh Trinh

This paper presents a new model-free data-interpretation approach for damage detection of bridges using long-term monitoring data. The approach combines two model-free methods: Moving Principal Component Analysis (MPCA) and Robust Regression Analysis (RRA) ...

2012

Reducing Uncertainties Regarding Remaining Lives of Structures Using Computer-aided Data Interpretation

Ian Smith, Romain Pasquier, James-Alexandre Goulet

The growing importance of economic and environmental issues associated with the replacement of transportation infrastructure creates a demand for new techniques that are able to predict accurately the behaviour of existing structures. While monitoring stru ...

2012

A Hybrid Model-Free Data-Interpretation Approach For Damage Detection During Continuous Civil-Infrastructure Monitoring

Ian Smith, Irwanda Laory, Ngoc Thanh Trinh

A hard challenge associated with infrastructure monitoring is to extract useful information from large amounts of measurement data in order to detect changes in structures. This paper presents a hybrid model-free approach that combines two model-free metho ...

2012

Measurement System Configuration for Damage Identification of Continuously Monitored Structures

Ian Smith, Nizar Bel Hadj Ali, Irwanda Laory, Ngoc Thanh Trinh

Measurement system configuration is an important task in structural health monitoring in that decisions influence the performance of monitoring systems. This task is generally performed using only engineering judgment and experience. Such approach may resu ...

American Society of Civil Engineers2012

Design Aspects of a Deployable Tensegrity-Hollow-rope Footbridge

Ian Smith, Landolf-Giosef-Anastasios Rhode-Barbarigos, René Motro, Nizar Bel Hadj Ali

Tensegrity structures are composed of cables and struts in a prestressed self-equilibrium. Although tensegrity first appeared in the 1950s, it is seldom used in civil engineering. This paper focuses on the design aspects of a deployable tensegrity-hollow-r ...

2012

Configuration of control system for damage tolerance of a tensegrity bridge

Ian Smith, Nizar Bel Hadj Ali, Sinan Korkmaz

Tensegrity structures are spatial, discrete, and lightweight structures that are composed of struts in compression and pre-stressed cables. Stability is provided by the self-stress state between elements independently of external actions. Tensegrity struct ...

Elsevier2012

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