Changes in modal parameters of a steel truss bridge due to artificial damage

C.W. Kim; K.C. Chang; S. Kitauchi; P. J. McGetrick; K. Hashimoto; K. Sugiura

Changes in modal parameters of a steel truss bridge due to artificial damage

C.W. Kim, K.C. Chang, S. Kitauchi, P. J. McGetrick, K. Hashimoto, K. Sugiura

Research output: Chapter in Book/Report/Conference proceeding › Chapter

9 Citations (Scopus)

275 Downloads (Pure)

Abstract

This study investigated how damage changes the modal parameters of a real bridge by means of a field experiment which was conducted on a real steel truss bridge consecutively subjected to four artificial damage scenarios. In the experiment, both the forced and free vibrations of the bridge were recorded, the former for identifying higher modes available exclusively and the latter for lower modes with higher resolution. Results show that modal parameters are little affected by damage causing low stress redistribution. Modal frequencies decrease as damage causing high stress redistribution is applied; such a change can be observed if the damage is at the non-nodal point of the corresponding mode shape. Mode shapes are distorted due to asymmetric damage; they show an amplification in the damaged side as damage is applied at the non-nodal point. Torsion modes become more dominant as damage is applied either asymmetrically or on an element against large design loads.

Original language	English
Title of host publication	Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013
Editors	George Deodatis, Bruce R. Ellingwood, Dan M. Frangopol
Place of Publication	New York
Publisher	CRC Press
Pages	3725-3732
Number of pages	8
ISBN (Print)	9781138000865
Publication status	Published - 10 Feb 2014

Access to Document

Changes in Modal Parameters of a Steel Truss Bridge due to Artificial Damage
© 2014 CRC/Balkema Published in Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures
Accepted author manuscript, 525 KB

Fingerprint Dive into the research topics of 'Changes in modal parameters of a steel truss bridge due to artificial damage'. Together they form a unique fingerprint.

Cite this

Kim, C. W., Chang, K. C., Kitauchi, S., McGetrick, P. J., Hashimoto, K., & Sugiura, K. (2014). Changes in modal parameters of a steel truss bridge due to artificial damage. In G. Deodatis, B. R. Ellingwood, & D. M. Frangopol (Eds.), Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013 (pp. 3725-3732). CRC Press. https://www.crcpress.com/Safety-Reliability-Risk-and-Life-Cycle-Performance-of-Structures-and/Deodatis-Ellingwood-Frangopol/9781138000865

Kim, C.W. ; Chang, K.C. ; Kitauchi, S. ; McGetrick, P. J. ; Hashimoto, K. ; Sugiura, K. / Changes in modal parameters of a steel truss bridge due to artificial damage. Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013. editor / George Deodatis ; Bruce R. Ellingwood ; Dan M. Frangopol. New York : CRC Press, 2014. pp. 3725-3732

@inbook{3cfe1e8c81774daebf268582ac5b483c,

title = "Changes in modal parameters of a steel truss bridge due to artificial damage",

abstract = "This study investigated how damage changes the modal parameters of a real bridge by means of a field experiment which was conducted on a real steel truss bridge consecutively subjected to four artificial damage scenarios. In the experiment, both the forced and free vibrations of the bridge were recorded, the former for identifying higher modes available exclusively and the latter for lower modes with higher resolution. Results show that modal parameters are little affected by damage causing low stress redistribution. Modal frequencies decrease as damage causing high stress redistribution is applied; such a change can be observed if the damage is at the non-nodal point of the corresponding mode shape. Mode shapes are distorted due to asymmetric damage; they show an amplification in the damaged side as damage is applied at the non-nodal point. Torsion modes become more dominant as damage is applied either asymmetrically or on an element against large design loads.",

author = "C.W. Kim and K.C. Chang and S. Kitauchi and McGetrick, {P. J.} and K. Hashimoto and K. Sugiura",

year = "2014",

month = feb,

day = "10",

language = "English",

isbn = "9781138000865",

pages = "3725--3732",

editor = "Deodatis, {George } and Ellingwood, {Bruce R.} and Frangopol, {Dan M. }",

booktitle = "Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013",

publisher = "CRC Press",

}

Kim, CW, Chang, KC, Kitauchi, S, McGetrick, PJ, Hashimoto, K & Sugiura, K 2014, Changes in modal parameters of a steel truss bridge due to artificial damage. in G Deodatis, BR Ellingwood & DM Frangopol (eds), Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013. CRC Press, New York, pp. 3725-3732. <https://www.crcpress.com/Safety-Reliability-Risk-and-Life-Cycle-Performance-of-Structures-and/Deodatis-Ellingwood-Frangopol/9781138000865>

Changes in modal parameters of a steel truss bridge due to artificial damage. / Kim, C.W.; Chang, K.C.; Kitauchi, S.; McGetrick, P. J.; Hashimoto, K.; Sugiura, K.

Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013. ed. / George Deodatis; Bruce R. Ellingwood; Dan M. Frangopol. New York : CRC Press, 2014. p. 3725-3732.

Research output: Chapter in Book/Report/Conference proceeding › Chapter

TY - CHAP

T1 - Changes in modal parameters of a steel truss bridge due to artificial damage

AU - Kim, C.W.

AU - Chang, K.C.

AU - Kitauchi, S.

AU - McGetrick, P. J.

AU - Hashimoto, K.

AU - Sugiura, K.

PY - 2014/2/10

Y1 - 2014/2/10

N2 - This study investigated how damage changes the modal parameters of a real bridge by means of a field experiment which was conducted on a real steel truss bridge consecutively subjected to four artificial damage scenarios. In the experiment, both the forced and free vibrations of the bridge were recorded, the former for identifying higher modes available exclusively and the latter for lower modes with higher resolution. Results show that modal parameters are little affected by damage causing low stress redistribution. Modal frequencies decrease as damage causing high stress redistribution is applied; such a change can be observed if the damage is at the non-nodal point of the corresponding mode shape. Mode shapes are distorted due to asymmetric damage; they show an amplification in the damaged side as damage is applied at the non-nodal point. Torsion modes become more dominant as damage is applied either asymmetrically or on an element against large design loads.

AB - This study investigated how damage changes the modal parameters of a real bridge by means of a field experiment which was conducted on a real steel truss bridge consecutively subjected to four artificial damage scenarios. In the experiment, both the forced and free vibrations of the bridge were recorded, the former for identifying higher modes available exclusively and the latter for lower modes with higher resolution. Results show that modal parameters are little affected by damage causing low stress redistribution. Modal frequencies decrease as damage causing high stress redistribution is applied; such a change can be observed if the damage is at the non-nodal point of the corresponding mode shape. Mode shapes are distorted due to asymmetric damage; they show an amplification in the damaged side as damage is applied at the non-nodal point. Torsion modes become more dominant as damage is applied either asymmetrically or on an element against large design loads.

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84892386535&partnerID=8YFLogxK

M3 - Chapter

AN - SCOPUS:84892386535

SN - 9781138000865

SP - 3725

EP - 3732

BT - Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013

A2 - Deodatis, George

A2 - Ellingwood, Bruce R.

A2 - Frangopol, Dan M.

PB - CRC Press

CY - New York

ER -

Kim CW, Chang KC, Kitauchi S, McGetrick PJ, Hashimoto K, Sugiura K. Changes in modal parameters of a steel truss bridge due to artificial damage. In Deodatis G, Ellingwood BR, Frangopol DM, editors, Safety, Reliability, Risk and Life-Cycle Performance of Structures and Infrastructures - Proceedings of the 11th International Conference on Structural Safety and Reliability, ICOSSAR 2013. New York: CRC Press. 2014. p. 3725-3732