Rohit Mourya (Structural Health Monitoring System)

8/4/2019 Rohit Mourya (Structural Health Monitoring System)

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K.D.K. COLLEGE OF ENGINEERING NAGPURDepartment of Civil Engineering

2011 2012

Structural Health Monitoring Systems(Bridges)

GuideProf. ( Miss P.S. Randive)

Co-Guide

Prof. (Miss A.B. Kamdi)


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Contents

Introduction

Structural Health Monitoring Systems

Definition of Bridge Health Monitoring

Types of Monitoring

Monitoring Metrics Types of Systems

Applications of Bridge Health Monitoring

Allahabad -Naini Bridge ( Indias biggest cable-stayedbridge)

Modern Bridge Monitoring Design

Conclusions

References


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Introduction

Brief discussion of aging infrastructureThe transportation infrastructure is quickly aging. Increases in traffic, in both urban

and rural areas, puts more strain on the bridge networks than was originally intended.Bridge engineers need a reliable way to assess structural integrity of bridges tomaintain the continuous operation of the road network while ensuring the safety of the

public.

Motivation for ReportState bridge engineers are responsible for many aspects of bridge networks. Due to

the large number of systems that are available, it is impossible for an engineer to sortthrough all these systems without knowledge of: (a) the capabilities of a particularsystem and (b) which companies offer particular systems and services. This report

briefly explains the concepts, advantages, and disadvantages behind commerciallyavailable health monitoring systems. It simplifies the task for system selection, from thelarge number of commercially available systems that exist, using a computer programto find the system that best fits the needs of a specific bridge.


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Structural Health Monitoring Systems

The goal of structural health monitoring is thedetermination of the location and severity of damage inbuildings and bridges as they happen (i.e., in real time).

The essence of structural health monitoring is thedevelopment of autonomous systems for the continuousmonitoring, inspection and damage detection of structureswith minimum labor involvement


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Bridge Health Monitoring

Bridge monitoring is the application of structural healthmonitoring (SHM) and inspection techniques to bridgestructures.

The general definition for bridge monitoring, that is, theapplication of SHM to bridge structures, does not rule outinspection, non-destructive evaluation and short-termmonitoring.


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TypesofMonitoring

Time Frame :-

a) Short term

b) Long Term

c) Inspection

d) Early Warning

e) Collapse Warning

Scale:-

a) Local

b) Memberc) Global


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Monitoring Metrics

Monitoring metrics are a system of parameters intended tomeasure bridge condition and performance. Depending onthe type of bridge and the needs of the bridge owner,different measurements should be taken in order to properly

monitor bridge health.

General Metrics:-

Acceleration

Climatic Condition

Curvature

Displacements Load

Tilt/Slope

Scour


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Concrete Metrics:- Corrosion

Cracking

Location of rebar

Strain Strength

Tension

Steel Metrics:-

Corrosion

Crack growth Cracking

Stain

Tension


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Types of Systems

Many types of systems are available for bridge healthmonitoring. These systems involve a variety of different

physical and chemical processes that have been harnessedto monitor certain bridge characteristics.

Types:-

3-D Laser Scanning

Accelerometers

Acoustic Emission (AE)

Chain dragging

Concrete Resistivity Digital Image Correlation (DIC)

Electrochemical Fatigue Sensing System


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Fiber Optics

Ground Penetrating Radar (GPR)

Ground Penetrating Radar (GPR)

Impact Echo

Impact Echo Schematic


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Application Of Bridge Health Monitoring

Humber Bridge , UK (1981) Faro-Falster Bridge, Denmark (1985) Sunshine Skyway Bridge, Florida, USA (1986) Skarnsundet Bridge, Norway (1990)

Confederation Bridge, Canada (1995) Tsing Ma Bridge, Hong Kong (1997) Seo-Hae Bridge, South Korea (2000) Neva Bridge, Russia (2004) Ermanninsuo Railway Embankment, Finland (2005)

Naini Bridge, India (2005) Stonecutters Bridge, Hong Kong, China (2008) Messina Bridge , Italy (coming next year)


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Allahabad - Naini Bridge

Figures and Facts:- Location : Allahabad/Naini, India Owner : Republic of India, represented by

the Ministry of Surface Transport Contractor : JV HCC / Hyundai Design : COWI Consult

Cable-stayed bridge Consulting engineers : JV COWI-SPAN Total investment costs : 40 million Euros Utilization : roadway link between Allahabad

and NH 27 Total Bridge Length : 370 m Width of superstructure: 26 m Main spans : 185 m 260 m 185 m


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Naini Allahabad Bridge , India


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Modern Bridge Monitoring Design

Data collection and control:-

Data Collection

Data Storage

Data Access

Data Processing and Management Supervisory control

SHMS Building Blocks:

Sensory Systems

Data acquisition system

Data Communication

Data Processing and Control system


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Conclusion

With the relentless aging of the civil infrastructure, bridgehealth monitoring is becoming more important every day.There are many methods to assess structural integrity and

each method has its advantages and disadvantages.

Monitoring systems that can automatically and reliablywarn the owner when failure is imminent do not seem to beavailable at this time. Such systems are yet to be developedand may become a very useful tool in the future. For

example, acoustic emission systems can locate damage, butit is difficult to quantify the extent of damage and theremaining service life. Thus, such information cannotwarrant closure of the bridge.


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References

." Concrete Bridge Practice - Construction, Maintenance andRehabilitation" V,K.Raina -Tata McGraw Hill

Structural health Monitoring system

Jacob Edege Anderson


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Rohit Mourya (Structural Health Monitoring System)