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Ian Smith

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Publications associées (220)

Page 3 sur 11

Feature Selection using Stochastic Search: An Application to System Identification

Ian Smith, Sandro Saitta

System identification using multiple-model strategies may involve thousands of models with several parameters. However, only a few models are close to the correct model. A key task involves finding which parameters are important for explaining candidate mo ...

American Society of Civil Engineers2010

Actuator Layout Optimization for Adaptive Structures Performing Large Shape Changes, Advanced Computing Strategies for Engineering

Ian Smith, Gennaro Senatore, Arka Prabhata Reksowardojo

Adaptive structures are sensed and actuated to modify internal forces and shape to maintain optimal performance in response to loads. The use of large shape changes as a structural adaptation strategy to counteract the effect of loads has been investigated ...

2018

Is there a relationship between footstep-impact locations and measured signal characteristics?

Ian Smith, Yves Sylvain Gilles Reuland, Sai Ganesh Sarvotham Pai, Slah Drira

Building utilization can be enhanced by tracking occupants. Non-intrusive tracking of occupants using floor-vibration measurements is beneficial for many smart-building applications such as energy consumption, security enhancement, and care-giving. Also, u ...

ACM2019

Data-Interpretation methodologies for Non-Linear Earthquake Response Predictions of Damaged Structures

Ian Smith, Pierino Lestuzzi, Yves Sylvain Gilles Reuland

Seismic exposure of buildings presents difficult engineering challenges. The principles of seismic design involve structures that sustain damage and still protect inhabitants. Precise and accurate knowledge of the residual capacity of damaged structures is ...

2017

Structural identification to improve bridge management

Ian Smith, James-Alexandre Goulet

This paper presents results from static loads tests performed on the new Langensand Bridge built in Switzerland. A systematic study of over 1000 models subjected to three load cases identifies a set of 11 candidate models through static measurements. Predi ...

International Association for Bridge and Structural Engineering2009

Performance comparison of reduced models for leak detection in water distribution networks

Ian Smith, Stephanie Ann German, Gaudenz Moser

This paper presents a methodology for comparing the performance of model-reduction strategies to be used with a diagnostic methodology for leak detection in water distribution networks. The goal is to find reduction strategies that are suitable for error-d ...

Elsevier2015

Model-based interpretation of floor vibrations for indoor occupant tracking

Ian Smith, Yves Sylvain Gilles Reuland, Slah Drira

Information regarding occupant flows inside buildings is beneficial for applications such as thermal-load control, market research and security enhancement. Existing methodologies for occupant tracking involve data-driven techniques that rely either on rad ...

2019

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

Measurement System Configuration for Damage Identification of Continuously Monitored Structures

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

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

Performance of two model-free data interpretation methods for continuous monitoring of structures under environmental variations

Ian Smith, Ngoc Thanh Trinh, Irwanda Laory

Interpreting measurement data from continuous monitoring of civil structures for structural health monitoring (SHM) is a challenging task. This task is even more difficult when measurement data are influenced by environmental variations, such as temperatur ...

2011

The impact of uncertainties on post-earthquake response predictions of a building with unreinforced masonry walls

Ian Smith, Katrin Beyer, Mathias Christian Haindl Carvallo

In this paper, the impact of several sources of uncertainty on the seismic response of an experimentally tested building is assessed for the case of a post-earthquake scenario. The building comprises unreinforced masonry and reinforced concrete walls. It i ...

2022

Joint Friction during Deployment of a Near-Full-Scale Tensegrity Footbridge

Ian Smith, Ann Christine Sychterz

Most deployable structures, such as operable roofs and masts, move over one degree of freedom. This paper describes a structure that involves loosely coupled movement over several degrees of freedom. Analysis models of these structures are typically inaccu ...

American Society of Civil Engineers2017

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

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

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

Usefulness of ambient-vibration measurements for seismic assessment of existing structures

Ian Smith, Pierino Lestuzzi, Yves Sylvain Gilles Reuland

A large number of buildings in regions with low to medium seismic hazard have been designed without considering earthquake actions. Retrofitting of all buildings that fail to meet modern code requirements is economically, technically and environmentally un ...

2017

A dynamic-relaxation formulation for analysis of cable structures with sliding-induced friction

Ian Smith, Nizar Bel Hadj Ali, Ann Christine Sychterz

In many cable structures, special types of joints are designed to allow cables to slide freely along the joints. Thus, a number of discrete cable elements are substituted by a single continuous cable that slides over multiple nodes. Continuous cables are e ...

Elsevier2017

A new method to design structures that adapt to loads via large shape changes

Ian Smith, Gennaro Senatore, Arka Prabhata Reksowardojo

The construction industry contributes to more than a third of the global energy demand and consumes almost half of all mined material resources. It is thus important to include energy and material efficiency criteria for the design of civil structures. Ada ...

2018

Validating model-based data interpretation methods for quantification of reserve capacity

Ian Smith, Sai Ganesh Sarvotham Pai

Optimal performance of civil infrastructure is an important aspect of liveable cities. A judicious combination of physics-based models with monitoring data in a validated methodology that accounts for uncertainties is explored in this paper. This methodolo ...

2021

Overcoming the limitations of traditional model-updating approaches

Ian Smith, James-Alexandre Goulet

Model updating is useful for improving structural performance assessments. This paper examines an important assumption of traditional model-updating approaches. This assumption requires the error independence between points where predictions and measuremen ...

ASCE2011

Uncertainties in Structural Behavior for Model-Based Occupant Localization Using Floor Vibrations

Ian Smith, Sai Ganesh Sarvotham Pai, Slah Drira

In sensed buildings, information related to occupant movement helps optimize functions such as security, energy management, and caregiving. Due to privacy needs, non-intrusive sensing approaches for tracking occupants inside buildings, such as vibration se ...

2021

Evaluating two model-free data interpretation methods for measurements that are influenced by temperature

Ian Smith, Ngoc Thanh Trinh, Irwanda Laory

Interpreting measurement data to extract meaningful information for damage detection is a challenge for continuous monitoring of structures. This paper presents an evaluation of two model-free data interpretation methods: moving principal component analysi ...

Elsevier2011