Slide 1

US Rt 23 Wayne Bridge Test Leading the technology in Structural Health Monitoring S. Paul Sumitro, Ph.D, PE Chris Roney www.smart-structures.com US Rt 23 Wayne Bridge Test

Slide 2

Presentation outline What Smart Structures is Innovative sensory technology Smart Scanner Stick Scanner Telecentric (deflection) Telecentric (strain) Presentation outline

Slide 3

Schematic description of SHMS

Slide 4

Software for Bridge Health Monitoring

Slide 5

SHMS System

Slide 6

June 10 -11, 2011 KRC Japan Smart Structures USA Wayne Bridge Rt. 23 NJ

Slide 7

KRC Japan Smart Structures USA Wayne team

Slide 8

Full-field Optical Monitoring Techniques 8 - Smart Scanner: strain, stress investigate internal concrete structures - Stick Scanner: - Strain - deflection - Telecentric:

Slide 9

OVERVIEW As the first step to evaluate bridges condition, field load test is needed to assure bridges safety level As the first step to evaluate bridges condition, field load test is needed to assure bridges safety level Troublesome in load test:Troublesome in load test: - Sensor installation; - Sensor installation; - cabling - cabling 9

Slide 10

Smart Scanner Non-destructive and non-contact: Non-destructive and non-contact: No scaffolding, no attachment, no cabling;No scaffolding, no attachment, no cabling; Speedy and appropriate information: Speedy and appropriate information: not only point-wise data, but also planar information; not only point-wise data, but also planar information; No image-warp: constant focus and constant distance; No image-warp: constant focus and constant distance; High resolution: High resolution: surface strain measurement,surface strain measurement, user-friendly software based on digital image correlation method.user-friendly software based on digital image correlation method. 10

Slide 11

Line Sensing Scanner Flat head Image Scanner Resolution: 4800dpi Wide range Constant brightness (fix attachment, no external effect) Simple and low cost 11

Slide 12

Flat Head Image Scanner Driving shaft (motor, guiderail, timing belt) Light Source Line sensor glass CIS (Contact Image Sensor) Primary Scanning direction Secondary Scanning Direction No lens (no aberration) Light, compact, low cost The resolution in secondary direction is lower than primary direction 12

Slide 13

Digitalized Image Correlation Analyses Deforme d Pre- deform ed Range Scanner Sub set (NN) Deforme d Pre- deforme d Sub set (NN) Pre- deforme d Deforme d Pixel Digitalize d 13

Slide 14

Concrete Wood 14 Steel

Slide 15

15 turnable Full field scanner sensor Line sensor Fixer Rotary table shield Full-field Scanner

Slide 16

Smart Scanner Leg Window Micrometer adjuster Focal digital meter Thermometer surface Thermometer sensor Battery Rear SecondarySecondary Primary dir Line sensor Scanning bar Stepping motor Linear encoder Front

Slide 17

Corrosive crack at pier cap

Slide 18

Crack gauge

Slide 19

Measured data Studs and mounts 19 Studs Mounts

Slide 20

Smart Scanner installation

Slide 21

Crack width and crack distribution

Slide 22

Stick Scanner Full field investigation, small drilled hole Core Material analyses Endoscope low cost, constructability Micro destructive Combine pros Handy scanner Stick Scanner development structural destructive Narrow field Development background crack broken core

Slide 23

Stick Scanner specifications Sensor Adjuster Resolution 600dpi Range 350mm Weight +/- 1kg Interface USB Scan length: Ver.3 105mm Compact model Spec Ver.3 Ver.4 Tablet PC Ver.4 SD card Ver.4 210mm Sensor Adjuster guide