SPECIAL MOBILITY STRAND SYSTEM IDENTIFICATION OF BRIDGES USING - - PowerPoint PPT Presentation

Damir Zenunovic Full Profesor, University of Tuzla, Faculty of Mining, Geology and Civil Engineering, Department of Civil Engineering

SPECIAL MOBILITY STRAND

SYSTEM IDENTIFICATION OF BRIDGES USING AMBIENT VIBRATION MEASUREMENTS AND NUMERICAL SIMULATIONS (CASE STUDIES) Damir Zenunovic Tirana, April 2019

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

CASE STUDY 1 – THE BRIDGE OVER RIVER BOSNIA IN SARAJEVO

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Elevation and cross-sections of the bridge

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Test equipment

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurements setup

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Test equipment

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Test equipment

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on base station 6R (middle of the span)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Ambient vibration testing procedure consists of real time recording of the vibrations and processing of the records by means of the Fast Fourier Transform , i. e. obtaining of Fourier Amplitude Spectra.

 

   

dt e t x f X

if  2

) ( ) (

Time history-AV

• 4
• 2

2 4 100 200 300 400 500 t A

frequencies (Hz) relative amplitude

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

The peaks of the amplitude spectrum occur at the predominant frequencies of the time function x(t), which due to the flat spectrum of the excitation represent the natural frequencies of the structure.

 

   

dt e t x f X

if  2

) ( ) (

Time history-AV

• 4
• 2

2 4 100 200 300 400 500 t A

AV test, Model, Reference point

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 2 4 6 8 10 12 14 16 18 20 22 24 f(Hz) rel.am p litu d e f=8.3Hz

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on base station 6R (middle of the span)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on base station 6R (middle of the span)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on base station 6R (middle of the span)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on moveable station 4R (middle of the span)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Comparison of vertical channels

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measured dominant frequency

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Transfer data to another program

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Transfer data to another program

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Finite Element Models (FEMs)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Finite Element Models (FEMs)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Review of the FEMs

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Modal frequencies

Modal frequencies

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Comparison of the modes parameters (mode shapes) identified by AVM and FEMs

aij

ai/ar=1.00 Normalized amplitudes at selected points (levels) for each particular mode shape

) ( ) (

, j r j i j i

f X f X a 

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified first vertical mode shapes

1

• 1

2 3 4 5 6 7 8 9 10 11

• 1
• 0,2
• 0,4
• 0,6
• 0,8

0,2 0,4 0,6 0,8 1 12 13 14 15 16 17 AVM AM1 AM2

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified first transverse mode shapes

1

• 1

2 3 4 5 6 7 8 9 10 11

• 1
• 0,2
• 0,4
• 0,6
• 0,8

0,2 0,4 0,6 0,8 1 1L 2L 3L 4L 5L 6L 7L 8L 9L 10L 11L 1R 2R 3R 4R 5R 6R 7R 8R 9R 10R 11R AVM AM1 AM2

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

CASE STUDY 2 – THE TWIN BRIDGE “GOCE DELCEV” IN SKOPJE

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Elevation and cross-sections of the bridge

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurements setup

• 1. Upstream bridge

1 2 4 6 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

• 2. Downtream bridge

1 2 4 6 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 Vardar river The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

• 1. Upstream bridge

1 2 4 6 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

• 2. Downtream bridge

1 2 4 6 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 Vardar river

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Transversal chanels

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on base station 16R

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurement on moveable station

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measured dominant frequency

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

1st vertical mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

1st transverse mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

2nd vertical mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

2nd transverse mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Finite Element Models (FEMs)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Mathematically identified 1st vertical mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Mathematically identified 2nd transverse mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified first vertical mode shapes

15 13 1 3 5 7 9 11 17 19 21 23 25 27 29 31 33 35 1 0,8 0,6 0,4 0,2

• 0,2
• 0,4
• 0,6
• 0,8
• 1

AVM AM3

• 1

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified first transverse mode shapes

• 1

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 1 0,8 0,6 0,4 0,2

• 0,2
• 0,4
• 0,6
• 0,8
• 1

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35

AVM AM3

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified second vertical mode shapes

1 0,8 0,6 0,4 0,2

• 0,2
• 0,4
• 0,6
• 0,8
• 1
• 1

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35

AVM AM3

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified second transverse mode shapes

• 1

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 1 0,8 0,6 0,4 0,2

• 0,2
• 0,4
• 0,6
• 0,8
• 1

1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 AVM AM3

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

CASE STUDY 3 – THE CABLE - STAYED BRIDGE IN TUZLA

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Elevation and cross-sections of the bridge

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Measurements setup

1 3 5 7 9 11 13 15 17 19 21 2 4 6 8 10 12 14 16 18 20 22

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Frequency spectrum

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

ARTeMIS

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

1st mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

2nd mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Finite Element Models (FEMs)

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Mathematically identified 1st mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Mathematically identified 2nd mode

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified first mode shape

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Experimentally and mathematically identified second mode shape

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

The presented studies show that the signal analysis of ambient vibration records allows the determination of the dynamic characteristics of the bridge. In addition, the frequency and associated modes of vibration can be assessed with adequate mathematical model. The presented results clearly indicate the great potential that ambient vibration measurements hold for monitoring bridge structures. The data collected during the ambient vibration test, which only took some hours and very few resources, processed with adequate algorithms provided very useful information. The comparisons presented in case studies constitute a validation

• f

the developed mathematical models and at the same time permit some fine tuning, especially concerning the boundary conditions and unexpected channel

• errors. In particular, this slides clearly shows that it was possible to extract a

lot of useful information from data collected during the ambient vibration test.

The European Commission support for the production of this publication does not constitute an endorsement of the contects which refrects the views only of the authors, and the Commision cannot be held responsible for any use which may be made of the information contained therein.

Thank you for your attention

e-mail: damir.zenunovic@untz.ba

Knowledge FOr Resilient soCiEty