Structural Health Monitioring_ppt

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It gives details about the methods to structurally monitor the health of the current building stock.

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  • STRUCTURALH

    EALTH

    MONITORING

    (SHM)

    (SHM)

    dr.ing.N

    AGY

    GYRGYTams

    lecturer

    2012

    v1

  • REFERENCES

    SHM

    http://wwwshmlivecom/

    SHM

    http://www.shmlive.com/

    SAMCO

    http://www.samco.org/network/index.htm

    ISISandSAMCOEducationalModule5:AnIntroductiontoStructuralHealth

    Monitoring

    Monitoring

  • INTRODUCTION

    Why

    we

    need

    SHM?

    Population

    dependson

    anextensive

    infrastructure

    system

    roads

    highways

    highways

    buildings

    etc

    The

    infrastructure

    system

    hassuffered

    neglect

    dti

    tideterioration

    lack

    offunding

    GlobalInfrastructure

    Crisis

    ISIS

    Canada E

    ducational M

    odule

    5

    GlobalIn

    frastructure

    Crisis

  • INTRODUCTION

    Why

    we

    need

    SHM?

    Factors

    leadingto

    the

    extensive

    degradation

    Factor1

    Unsatisfactoryinspectionandmonitoringof

    Factor1

    Unsatisfactory

    inspection

    and

    monitoringof

    existingin

    frastructure

    Consequences:

    Problemsbecome

    apparentonly

    when

    structuresare

    indire

    need

    ofrepair

    Result

    Repair

    costsb

    ecome

    comparable

    to

    replacementcosts

    ISIS

    Canada E

    ducational M

    odule

    5

  • INTRODUCTION

    Why

    we

    need

    SHM?

    Factors

    leadingto

    the

    extensive

    degradation

    Factor2

    Corrosionofconventionalsteel

    Factor2

    Corrosion

    ofconventional

    steel

    reinforcementwithin

    concrete

    Consequences:

    Expansion

    ofste

    elleadsto

    crackingand

    spalling,

    furtherdeterioration

    Result

    Reductionsin

    strength

    and

    serviceability,

    resulting

    inne

    ed

    forre

    pair

    and/orre

    placement

    ISIS

    Canada E

    ducational M

    odule

    5

  • INTRODUCTION

    Why

    we

    need

    SHM?

    Factors

    leadingto

    the

    extensive

    degradation

    Factor3

    Increasedloadsordesignrequirementsover

    Factor3

    Increased

    loadsordesign

    requirements

    over

    time

    (e.g.heaviertrucks)

    Consequences:

    Increased

    deterioration

    due

    tooverloadsor

    tostructuralinadequaciesresultingfrom

    design

    Result

    Structuresd

    eemed

    unsafe

    orun

    serviceable

    and

    strengthening

    orre

    placementis

    required

    ISIS

    Canada E

    ducational M

    odule

    5

  • INTRODUCTION

    Why

    we

    need

    SHM?

    Factors

    leadingto

    the

    extensive

    degradation

    Factor4

    Overalldeteriorationand/oraging

    Factor4

    Overalldeterioration

    and/oraging

    Consequences:

    Variousdetrimentaleffectson

    structural

    performance,both

    safety

    and

    serviceability

    Result

    Need

    forre

    pair,re

    habilitation,

    strengthening

    orre

    placement

    ISIS

    Canada E

    ducational M

    odule

    5

  • INTRODUCTION

    Materials

    &Technologies

    SHM

    FRP

    ++

    New

    and

    innovative

    materialsand

    monitoring

    tools

    that

    prolong

    the

    service

    livesofstructureswhile

    decreasingcosts

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    Assessingthe

    inservice

    perform

    anceofstructuresusinga

    variety

    ofm

    easurementte

    chniques

    Leadingto

    smartstructures

    EXTERNAL

    DISTURBANCES

    STRUCTURE

    RESPONSE

    SENSORS

    ACTUATORS

    CONTROLLER

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    Inspection

    On

    site

    non

    destructive

    examination

    toestablish

    the

    presentcondition

    ofthe

    structure

    p

    Load

    testing

    Test

    ofthe

    structure

    orpart

    thereofbylo

    adingto

    ealateitsbehaiororpropertiesortopredictits

    evaluate

    itsbehaviororproperties,

    orto

    predictits

    load

    bearingcapacity

    Monitoring

    Frequentorcontinuous,

    normally

    longterm,

    observation

    ormeasurementofstructuralco

    nditionsor

    actions

    Bj

    rnT

    ljs

    ten

  • WHAT

    ISSH

    M?

    Why

    monitoring?

    follow

    upphysical

    phenomenon

    checkuotthecalculationmodels

    Bj

    rnT

    ljs

    ten

    check

    uotthe

    calculation

    models

    assessmentofstructures

    verification

    ofthe

    strengtheningeffects

  • WHAT

    ISSH

    M?

    Whatis

    SHM

    becoming

    popular?

    Emerging

    use

    ofSH

    Mis

    aresult

    of:

    1.The

    increasingneed

    for

    Monitoringofinnovative

    designsand

    materials

    Bettermanagementofexistingstructures

    Bettermanagementofexistingstructures

    2.The

    ongoingdevelopmentof

    N(

    Fib

    OtiS

    (FOS)

    tNew

    sensors

    (e.g.FiberOpticSensors

    (FOS),smart

    materialsetc.)

    Dataacquisition

    systems(D

    AS)

    Wireless

    and

    internette

    chnologies

    Datatransmission,co

    llection,archivingand

    retrievalsystems

    Dataprocessingandeventidentification

    Dataprocessingand

    eventidentification

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    Body

    Analogy

    dl

    MedicalD

    octor

    SHM

    Engineer

    M

    onitorp

    atientsh

    ealth

    Usesmedicalequipment

    M

    onitorcondition

    ofstructures

    Usessensorsto

    check

    overall

    Us

    esm

    edicalequipment

    toch

    eck

    overall

    health

    Pr

    escribesc

    orrective

    dii

    ifi

    d

    Us

    ess

    ensors

    toch

    eck

    overall

    structuralh

    ealth

    If

    excessive

    stress

    or

    df

    titit

    timedicine

    ifrequired

    deform

    ation,co

    rrect

    situation

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    System

    Components

    Acquisition

    ofDa

    ta

    Communication

    ofDa

    ta

    IntelligentProcessing

    IntelligentP

    rocessing

    http://www.smartstructuresin

    c.com

    Storage

    ofPr

    ocessed

    Data

    Retrievalo

    fData

    Diagnostics

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    SHM

    Categories

    StaticF

    ield

    Testing:

    Behaviourtests

    Dynamic

    Field

    Testing:

    Stress

    history

    tests

    Behaviourtests

    Diagnostic

    tests

    Prooftests

    yAmbientvibration

    tests

    Dyn.Lo

    adAllowance

    (DLA)tests

    Pullback(anchoredcables)tests

    Pullback(anchored

    cables)

    tests

    Periodic

    Monitoring:

    Fieldtesting

    ContinuousM

    onitoring:

    Activemonitoring

    Field

    testing

    Teststo

    determine

    changesin

    structure

    Active

    monitoring

    Passive

    monitoring

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    Classification

    ofSH

    MSystems

    LevelIV

    Detectpresence

    locationseverityandconsequencesofdamage

    Detect

    presence,location,severity

    and

    consequencesofdamage

    LevelIII

    LevelII

    IDetect

    presence,location

    and

    severity

    ofdamage

    lLevelII

    Detect

    presence

    and

    location

    ofdamage

    LevelI

    Detectpresenceofdamage

    ISIS

    Canada E

    ducational M

    odule

    5

    Detect

    presence

    ofdamage

  • WHAT

    ISSH

    M?

    Classification

    ofSH

    MSystems

    ISIS

    Canada E

    ducational M

    odule

    5

  • WHAT

    ISSH

    M?

    Advantageso

    fSHM

    Advantageso

    fSHM

    Increased

    understandingofin

    situ

    structuralbehaviour

    g

    Early

    damage

    detection

    Assurancesofstructuralstrengthandserviceability

    Assurancesofstructuralstrength

    and

    serviceability

    Decreased

    down

    time

    forinspection

    and

    repair

    /Developmentofrational

    maintenance

    /managementstrategies

    Increased

    effectiveness

    inallocation

    ofscarce

    resources

    Enablesand

    encouragesuse

    ofnew

    and

    innovative

    materials

    ISIS

    Canada E

    ducational M

    odule

    5

  • METHODOLO

    GY

    Ideal

    SHMsystem:

    1.Information

    ondemand

    abouta

    structures

    health

    2.Warnings

    regardinganydamage

    detected

    Developmentofa

    SHMsystem

    involvesutilizing

    informationfrommanydifferentengineeringdisciplines

    information

    from

    manydifferentengineeringdisciplines

    Computers

    M

    aterials

    Ci

    iCommuni