1 (-38,- 2) v=25μ 45=42μ h=70μ 2m m 4m m (-44,4) v= - μ 45= - μ h=21μ (-40,4) v=58μ 45=...
Post on 21-Dec-2015
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1
(-38,-2)V=25μ
45=42μ H=70μ
2mm
4mm
4mm
4mm
4mm
4mm
4mm
(-44,4)V= - μ 45= -μ H=21μ
(-40,4)V=58μ45= -μ H=55μ
(-36,4)V=-34μ45=45μH=121μ
(-32,4)V=14μ45=43μ H=112μ
(-28,4)V=371μ 45=168μH=319μ
(-44,0)V= - μ 45=- μ H=23μ
(-40,0)V=37μ45= -μ H=86μ
(-36,0)V=-14μ45=36μH=425μ
(-32,0)V=9μ45=-26μH=338μ
(-28,0)V=244μ 45=140μ H=364μ
(-44,-4)V= - μ 45= -μ H=141μ
(-36,-4)V=30μ 45=37μH=250μ
(-32,-4)V=17μ
45=27μH=84μ
(-28,-4)V=32μ
45=-133μH=364μ
(-40,-4)V=-15μ45= -μ H=42μ
-X(-26,0)
Rozette Gauge φ50mm was used
Data Analyses
2
(2,34)V=-141μ45=-42μH=36μ
2mm
4mm
4mm
4mm
4mm
4mm
4mm
(-4,36)V=-78μ45=-4μH=48μ
(4,36)V=-158μ45=-52μH=40μ
(-4,32)V=-3μ45=53μH=81μ
(4,32)V=-56μ45=-5μH=60μ
(4,28)V=372μ45=-152μH=-701μ
(-4,28)V=-98μ45=-60μH=-643μ
+Y
(-4,44)V=-460μ45= -μ H=- μ
(-4,40)V=-120μ45= - μ H=602μ
(4,44)V=-347μ45= - μ H= -μ
(4,40)V=-42μ45= - μ H=-3μ
(0,26)
Rozzette gauge
(0,28)V=-457μ45=-49μH=332μ
(0,32)V=-89μ45=-3μH=27μ
(0,36)V=-157μ45=-92μH=33μ
(0,40)V=-149μ45= -μH=789μ
(0,44)V=-212μ45= - μ H= -μ
y = 0.9815x + 1.057
R2 = 0.9998
0
100
200
300
400
500
600
700
0 200 400 600
μスキャナによる計測値( )
μひ
ずみ
ゲー
ジに
よる
計測
値(
)
1 2 3 4 5 平均 標準偏差 補正値 差 (%)
ゲージ値 0 0 1 0 1 0
解析値 1 -2 2 1 2 1 1.32 2 2 1.60
ゲージ値 100 100 100 100 100 100
解析値 98 98 95 98 95 97 1.51 96 -4 -3.71
ゲージ値 201 202 202 201 200 201
解析値 203 201 205 205 201 203 1.70 200 -1 -0.33
ゲージ値 300 301 301 302 300 301
解析値 305 303 309 306 303 305 2.12 301 0 0.05
ゲージ値 401 401 401 401 401 401
解析値 410 411 412 412 413 411 1.09 405 4 1.07
ゲージ値 502 500 500 501 502 501
解析値 498 504 503 507 507 504 3.45 496 -5 -1.03
ゲージ値 600 600 600 601 601 600
解析値 612 608 608 613 612 611 2.00 600 0 0.03
1.98 2.20 1.12絶対値の平均
400μ
500μ
600μ
1200dpi
0μ
100μ
200μ
300μ
Deviation : 1.7%
Test Result
Concrete
Verification on Device Accuracy
Magnified Image
Load test on a RC beam
ひずみ計測範囲(西側)
ひずみ計測範囲(中央)
Target(West)
Target(Centre)
West Strain Distribution ( X component only )
→←0.04
→←0.03
0.45→← →←0.21
→←0.25
900 KN700 KN 800 KN
600 KN 500 KN 400 KN
300 KN200 KN100 KN
West Strain Distribution ( X-dir component only )
400 KN
以下
Legend ・・・ : Crack observed before loading―- : Crack propagate during
loading: Blot out of the water during loading
Unit :pixel
( μ )
500 KN
Test on RC beam
Test Summary
Prestressed Concrete Beam
2 points bending
Up to 280k N
12 Φ12.7mm strand configurati
on
40k N increments
700PC beam dimension
Unit :mm
Surface strain
Main Scanning direction
副走査方向
100 ㎜
150 ㎜
200 ㎜
250 ㎜
Strain gage configurationSmart Scanner Setup
Distance from lower fiber
Scanned area
Test Results
Verification
-100 0 100 200 300100
150
200
250 40KN
ひずみゲージ
新型装置
計算値
Strain(μ)
Dis
tan
ce f
rom
low
er
fib
er(mm)
Strain gauge
Smart Scanner
Analytical
-100 0 100 200 300100
150
200
250 80KN
ひずみゲージ
新型装置
計算値
Strain( μ)
Strain gaugeSmart Scanner
Analytical
Test Results
Verification
-200 -100 0 100 200 300100
150
200
250120KN
ひずみゲージ新型装置計算値
Strain(μ)
Dis
tance
fro
m low
er
fiber(
mm)
Strain gauge
Smart Scanner
Analytical
-100 0 100 200 300100
150
200
250 160KN
ひずみゲージ新型装置計算値
Strain( μ)
Strain gauge
Smart Scanner
Analytical
160k N Crack occures
Bottom slab
Strain measurement
Strain gauge configuration
Smart Scanner setup at the lower section
Central line
60mm gauge
30mmgauge
Strain measurement
0 KN40KN80KN120KN160K200KN : Crack width <
0.08mm240KN280KN
: Crack width > 0.08mm
Pixel ( μ )
Scanned strain countour
Beam surface
Strain Measurement Method
Primary direction
Secon
dary
d
ir
Distance from lower fiber196mm
Strain gaugeSmart Scanner setup
Results
Measured Point
Load ( KN)
Strain(μ)Error(μ) Average(μ)
Gauge Scanner
CL-x
80 -12 -13 1
2
120 -18 -21 3
160 -24 -22 2
200 -7 -8 1
240 110 113 3
CL-y
80 3 -3 6
11
120 4 -6 10
160 2 16 14
200 -17 -4 13
240 -23 -33 10
CL-z
80 8 10 2
8
120 11 16 5
160 14 17 3
200 24 50 26
240 45 39 6
Scanner and strain-gauge comparison
Test Result
80KN120KN
160KN200KN240KN
Measured strain contour
Background
Maintenance strategy based on long term monitoring scheme to prolong structure’s life span
Runway D ( Open October 2010 )
- Wharf: precast slab; field pouring in between- Provide holes for Stick Scanner to inspect concrete condition
Tokyo International Airport
- Serviceability assurance 100 years.- Maintenance planning from design stage
Holes for stick scanner have been provided since construction stage
LandfillWharf
Haneda
Runway D
Field-poured concrete in between two precast concrete slabs
Crack
Inspection holesTwo types: φ22mm and φ26mm
PCa slab
Shear connectors
Field poured concrete
Steel beam
Pavement
Stirrups
Stick Scanner
Modification for Tokyo International Airport
①Resolution :300dpi
②Diameter :φ22mm , φ26mm
③Max. length :615mm⑤Weight :997g
⑥Connection : PC card - cable
connector
Rear gripFront grip
Guide rail
sensor
④Total length : 890mm
Feature1It works for two diameters
φ22mm
φ26mm
Rear guide ring
Front guide ring
modifier
Adjust the focal length of sensor
Feature2
1st turn : right, scan 1 cycle
2nd turn : insert 95mm, left, scan 1 cycle3rd turn: insert 95mm, right, scan 1 cycle
Turn rightTurn left
Turn right
4th turn: insert 95mm, left, scan 1 cycle
Insert 95mm
Insert 95mm
Crack evaluation
φ22mm
0.080.05 0.03
Scale(m
m)
Scan(m
m)
Dev(m
m)
0.170.15 0.02
0.080.05 0.03
0.20 0.17 -0.03
Scale(m
m)
Scan(m
m)
Dev(m
m)
0.340.40 -0.06
0.310.30 0.01
0.38
0.17
0.35
0.25
0.03
-0.08
Crack width
9mm
W=0.15mm
φ26mm