NAGASAKI UNIVERSITYMatsuda laboratory

THREE-DIMENSIONAL PHOTOGRAMMETRY AND

THE APPLICATION TO SEISMIC RESPONSE ANALYSIS

○Masaki HONGO　 Hiroshi MATSUDA

3rd Joint Seminar in ShanghaiOctober 21

NAGASAKI UNIVERSITYMatsuda laboratory

INTRODUCTION

Blast Furnace , Chimney (end of 19th~beginning of 20th)

Industrial Heritages

reproduction, preservation

3D digital image

NAGASAKI UNIVERSITYMatsuda laboratory

INTRODUCTION

Blast Furnace , Chimney (end of 19th~beginning of 20th)

Industrial Heritages

reproduction, preservation

3D digital image

Finite element analysis

NAGASAKI UNIVERSITYMatsuda laboratory

INTRODUCTION

Blast Furnace , Chimney (end of 19th~beginning of 20th)

Industrial Heritages

reproduction, preservation

3D digital image

Finite element analysis

NAGASAKI UNIVERSITYMatsuda laboratory

INTRODUCTION

Take a much time and labor

Mesh generation

Optical Measurement Technique

Industrial Heritagesno design drawingcomplicated shapedeformed shape

NAGASAKI UNIVERSITYMatsuda laboratory

INTRODUCTIONOptical Measurement Technique

Laser scanner

Bad point

Good pointHigh precisionUsed mainly

Too expensiveOperation is complicated

NAGASAKI UNIVERSITYMatsuda laboratory

INTRODUCTIONOptical Measurement Technique

Laser scanner Photogrametry

Bad point

Good pointHigh precisionUsed mainly

Too expensiveOperation is complicated

Low-pricedOperation is simple

NAGASAKI UNIVERSITYMatsuda laboratory

PURPOSE

・ Examination of the validityand usefulness of the 3D measuring method using a digital camera and 3D photogrametry

・ Development of an automatic mesh generation system

・ Earthquake-proof evaluation by seismic response FE analysis

NAGASAKI UNIVERSITYMatsuda laboratory

MEASUREMENT THEORY

Looking is different by a photography direction

CAMERA B

CAMERA A

x

yz

PICTURE A PICTURE B

x

yz

x

yz

The same points

NAGASAKI UNIVERSITYMatsuda laboratory

PERFORMANCE COLLATION

length（cm） fudge factor(％) length(cm) fudge factor（％)1 4.3 4.1 4.8 4.3 02 7.3 7 4.2 7.3 03 15.2 15 1.3 15.1 0.64 15.2 15 1.3 15.1 0.6

Laser measurement Photogrammetryactual measurement（cm）

NAGASAKI UNIVERSITYMatsuda laboratory

NATURAL FREQUNCY

analytic value（Hz） fudge factor（％） analytic value（Hz） fudge factor（％）1 346 359.9 3.9 357.7 3.22 486 534.1 9.8 537.9 10.73 1382 1502.0 8.7 1460.0 5.64 1547 1632.0 5.5 1651.0 6.75 2437 2576.0 5.7 2410.0 1.16 2611 2846.0 9.0 2707.0 3.7

Laser measurement Potogrammetryexperimental value（Hz）mode

NAGASAKI UNIVERSITYMatsuda laboratory

VIBRATIONAL MODE

Holography

Photogrametry

Laser

Mode 6Mode 5Mode 4Mode 1 Mode 2 Mode 3

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PHOTOGRAMETRY

One Leg Torii in Sano Temple

NAGASAKI UNIVERSITYMatsuda laboratory

Exploratory experiment

(c) shape data(a) point group data

(b) wire frame data

NAGASAKI UNIVERSITYMatsuda laboratory

3D GEOMETRY MODEL

shape data solid data

make inside

NAGASAKI UNIVERSITYMatsuda laboratory

ANALYSIS RESULT

(a)crack distribution (b)strain of x (c)equivalent stress distribution

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NAGASAKI PEACE PRAYING STATUE

NAGASAKI UNIVERSITYMatsuda laboratory

LASER MEASUREMENT

Direction GDirection H

Direction A

Direction BDirection C

Direction D

Direction E

Direction F

Measurement direction Direction F

NAGASAKI UNIVERSITYMatsuda laboratory

PHOTOGRAMETORY

Direction 1

Direction 4Direction 3

Direction 2

Measurement direction direction 1

NAGASAKI UNIVERSITYMatsuda laboratory

3D GEOMETRY MODEL

(c) shape data(a) point group data

(b) wire frame data

Laser measurement(element:610415)

photogrametry(element:18176)

NAGASAKI UNIVERSITYMatsuda laboratory

VIBURATION MODE

Mode 1 Mode 4Mode 2 Mode 3

NAGASAKI UNIVERSITYMatsuda laboratory

NATURAL FREQUENCY

laser（Hz） camara（Hz） fudge factor（%）mode 1 3.47 3.35 3.46mode 2 5.07 4.96 2.17mode 3 8.94 8.80 1.57mode 4 9.34 9.30 0.43mode 5 10.90 10.80 0.92

Natural Frequency

Comparison of laser and camera

0.00

2.00

4.00

6.00

8.00

10.00

12.00

1 2 3 4 5Mode

Nat

ural

Fre

quen

cy (H

z)

laserphoto

NAGASAKI UNIVERSITYMatsuda laboratory

REINFORCEMENT

FE modelInside view Elevation view

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REINFORCEMENT

Excellence mode is 1st and 2nd mode

Mode 1

Mode 2

0.39(s) 0.18(s)

0.26(s) 0.17(s)

reinforce

natural period changed

NAGASAKI UNIVERSITYMatsuda laboratory

REINFORCEMENT

Response acceleration becomes small earthquake resistance improves

Excellence mode is 1st and 2nd mode

Mode 1

Mode 2

0.39(s) 0.18(s)

0.26(s) 0.17(s)

reinforce

natural period changed

NAGASAKI UNIVERSITYMatsuda laboratory

RC CHIMNEY

Detail beam element 3D element

KH=7.1×105 (t/m)Kθ=1.83×108 (t ・ m/rad)

Model ofSOFiSTiK

Model ofMARC

NAGASAKI UNIVERSITYMatsuda laboratory

NATURAL FREQUENCY

(Hz)

mode 1 mode 2beam 0.314 1.303solid 0.302 1.327beam 0.302 1.390solid 0.301 1.323

0.292 1.422

SOFiSTiK

MARC

chimney structure code

NAGASAKI UNIVERSITYMatsuda laboratory

MODE OF OSCILLATION

MARC

beam element

mode1 mode2

3D element

mode1 mode2

SOFiSTiK

mode1 mode23D element

mode1 mode2beam element

NAGASAKI UNIVERSITYMatsuda laboratory

FE MODEL

0

50

100

150

200

250

0 5 10 15 20 25

Acceleration (m/sec2)

Height (m)

0

50

100

150

200

250

0 200 400 600 800

Height (m)

Chimney structure codeMARC-beamMARC-shellSOFiSTiK-beamSOFiSTiK-shell

Maximum acceleration and maximum displacement

Displacement (mm)

NAGASAKI UNIVERSITYMatsuda laboratory

SUMMARY

1.FE mesh generation system was able to create to using 3D photogrametry2.The results of natural frequency analysis using the data obtained by laser measurement and photogrametry ware in agreement with each other3.the earthquake-proof improvement by reinforcement has been checked by investigating the natural period of vibration before and after reinforcement of a peace praying statue4.the results of the natural frequency analysis and elastic seismic response analysis of RC chimney by different analysis software and different modeling were mostly in agreement