Ambient vibration tests and analysis of a multiple-span elevated bridge

X. Chen; P. Omenzetter; S. Beskhyroun

doi:10.13140/2.1.3151.5200

Ambient vibration tests and analysis of a multiple-span elevated bridge

X. Chen, P. Omenzetter, S. Beskhyroun

Engineering

The University of Auckland

Research output: Chapter in Book/Report/Conference proceeding › Chapter (peer-reviewed) › peer-review

2 Citations (Scopus)

25 Downloads (Pure)

Abstract

Modal parameters (e.g., natural frequencies and mode shapes) describe the dynamic characteristics of bridge structures and their experimental identification is an important part of bridge assessment. More traditional experimental methods require artificial excitation by large equipment, which affects the normal operation of the bridge. However, reliable estimates of modal parameters can be extracted from ambient vibration caused by wind, traffic, environmental loads, etc. In this paper, the dynamic behavior of a 12 span, 700m long, curved, segmental, elevated concrete viaduct, recently constructed in Auckland, New Zealand, is investigated using ambient vibration tests and numerical modeling. Twelve vibration modes have been identified in the frequency range 0-10 Hz using two complementary modal parameter identification techniques: the peak picking method and stochastic subspace identification. Modal parameters estimated from ambient response have been compared with those obtained from a three-dimensional finite element model and good agreement demonstrated.

Original language	English
Title of host publication	From Materials to Structures
Subtitle of host publication	Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012
Publisher	CRC Press
Pages	393-398
Number of pages	6
ISBN (Print)	9780415633185
DOIs	https://doi.org/10.13140/2.1.3151.5200
Publication status	Published - 12 Aug 2013
Event	22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012 - Sydney, NSW, Australia Duration: 11 Dec 2012 → 14 Dec 2012

Conference

Conference	22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012
Country/Territory	Australia
City	Sydney, NSW
Period	11/12/12 → 14/12/12

Bibliographical note

The authors would like to acknowledge the support and assistance from the NGA Newmarket Project Engineer, David Leitner and other staff for facilitating the field testing, as well as the NZTA and NGA Newmarket for providing the opportunity to conduct research on the Newmarket Viaduct. We would also like to thank Peifen Chua for her assistance in conducting the ambient vibration tests.

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Cite this

Ambient vibration tests and analysis of a multiple-span elevated bridge. / Chen, X.; Omenzetter, P.; Beskhyroun, S.
From Materials to Structures: Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012. CRC Press, 2013. p. 393-398.

Research output: Chapter in Book/Report/Conference proceeding › Chapter (peer-reviewed) › peer-review

Chen, X, Omenzetter, P & Beskhyroun, S 2013, Ambient vibration tests and analysis of a multiple-span elevated bridge. in From Materials to Structures: Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012. CRC Press, pp. 393-398, 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012, Sydney, NSW, Australia, 11/12/12. https://doi.org/10.13140/2.1.3151.5200

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AB - Modal parameters (e.g., natural frequencies and mode shapes) describe the dynamic characteristics of bridge structures and their experimental identification is an important part of bridge assessment. More traditional experimental methods require artificial excitation by large equipment, which affects the normal operation of the bridge. However, reliable estimates of modal parameters can be extracted from ambient vibration caused by wind, traffic, environmental loads, etc. In this paper, the dynamic behavior of a 12 span, 700m long, curved, segmental, elevated concrete viaduct, recently constructed in Auckland, New Zealand, is investigated using ambient vibration tests and numerical modeling. Twelve vibration modes have been identified in the frequency range 0-10 Hz using two complementary modal parameter identification techniques: the peak picking method and stochastic subspace identification. Modal parameters estimated from ambient response have been compared with those obtained from a three-dimensional finite element model and good agreement demonstrated.

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Ambient vibration tests and analysis of a multiple-span elevated bridge

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