Field Measurement and Modal Identification of a Coupled Floor Slab System

S. K. AU; Y. C. NI; F. L. ZHANG; H. F. LAM

doi:10.1016/j.proeng.2011.07.166

Field Measurement and Modal Identification of a Coupled Floor Slab System

S. K. AU
, Y. C. NI
, F. L. ZHANG
, H. F. LAM

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

1 Citation (Scopus)

20 Downloads (CityUHK Scholars)

Abstract

This paper presents work on full-scale vibration tests of the second and third floor slabs of the Tin Shui Wai Indoor Recreation Centre. The concrete slabs are supported by one-way long span steel trusses and are connected by diagonal members and vertical columns to form a mega-truss. To determine the actual dynamic characteristics of the constructed slab system, ambient and forced vibration tests were performed. Thirty five setups were performed in the ambient vibration test to determine the mode shapes with a high spatial resolution. A recently developed Fast Bayesian FFT Method was used to identify the modal properties using the ambient data, where the mode shapes from individual setups were assembled by least square fitting. Forced vibration tests were performed by exciting the slabs with a long-stroke electromagnetic shaker, resulting in vibration amplitudes of the order of a few milli-g. A frequency sweep was carried out in the forced vibration tests and the modal properties were identified by least square fitting of steady-state amplitude spectra. The dynamic properties identified from the ambient and forced vibration tests will be compared and discussed.

Original language	English
Title of host publication	The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction - EASEC12
Editors	Heung Fai LAM
Pages	1318-1325
DOIs	https://doi.org/10.1016/j.proeng.2011.07.166
Publication status	Published - Jan 2011
Event	12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12) - Hong Kong Convention & Exhibition Centre, Hong Kong, China Duration: 26 Jan 2011 → 28 Jan 2011 http://bccw.cityu.edu.hk/easec12/wp_home.asp

Publication series

Name	Procedia Engineering
Publisher	Elsevier BV
Volume	14
ISSN (Print)	1877-7058

Conference

Conference	12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12)
Place	Hong Kong, China
Period	26/01/11 → 28/01/11
Internet address	http://bccw.cityu.edu.hk/easec12/wp_home.asp

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 3 Good Health and Well-being

Research Keywords

Ambient vibration test
Forced vibration test
Modal identification

Publisher's Copyright Statement

This full text is made available under CC-BY-NC-ND 3.0. https://creativecommons.org/licenses/by-nc-nd/3.0/

Access Output

10.1016/j.proeng.2011.07.166

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Cite this

@inproceedings{779d689062d8452b838cc1d1a6c59a99,

title = "Field Measurement and Modal Identification of a Coupled Floor Slab System",

abstract = "This paper presents work on full-scale vibration tests of the second and third floor slabs of the Tin Shui Wai Indoor Recreation Centre. The concrete slabs are supported by one-way long span steel trusses and are connected by diagonal members and vertical columns to form a mega-truss. To determine the actual dynamic characteristics of the constructed slab system, ambient and forced vibration tests were performed. Thirty five setups were performed in the ambient vibration test to determine the mode shapes with a high spatial resolution. A recently developed Fast Bayesian FFT Method was used to identify the modal properties using the ambient data, where the mode shapes from individual setups were assembled by least square fitting. Forced vibration tests were performed by exciting the slabs with a long-stroke electromagnetic shaker, resulting in vibration amplitudes of the order of a few milli-g. A frequency sweep was carried out in the forced vibration tests and the modal properties were identified by least square fitting of steady-state amplitude spectra. The dynamic properties identified from the ambient and forced vibration tests will be compared and discussed.",

keywords = "Ambient vibration test, Forced vibration test, Modal identification",

author = "AU, \{S. K.\} and NI, \{Y. C.\} and ZHANG, \{F. L.\} and LAM, \{H. F.\}",

year = "2011",

month = jan,

doi = "10.1016/j.proeng.2011.07.166",

language = "English",

series = "Procedia Engineering",

publisher = "Elsevier BV",

pages = "1318--1325",

editor = "LAM, \{Heung Fai\}",

booktitle = "The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction - EASEC12",

note = "12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12) ; Conference date: 26-01-2011 Through 28-01-2011",

url = "http://bccw.cityu.edu.hk/easec12/wp\_home.asp",

}

AU, SK, NI, YC, ZHANG, FL & LAM, HF 2011, Field Measurement and Modal Identification of a Coupled Floor Slab System. in HF LAM (ed.), The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction - EASEC12. Procedia Engineering, vol. 14, pp. 1318-1325, 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12), Hong Kong, China, 26/01/11. https://doi.org/10.1016/j.proeng.2011.07.166

Field Measurement and Modal Identification of a Coupled Floor Slab System. / AU, S. K.; NI, Y. C.; ZHANG, F. L. et al.
The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction - EASEC12. ed. / Heung Fai LAM. 2011. p. 1318-1325 (Procedia Engineering; Vol. 14).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

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AU - AU, S. K.

AU - NI, Y. C.

AU - ZHANG, F. L.

AU - LAM, H. F.

PY - 2011/1

Y1 - 2011/1

N2 - This paper presents work on full-scale vibration tests of the second and third floor slabs of the Tin Shui Wai Indoor Recreation Centre. The concrete slabs are supported by one-way long span steel trusses and are connected by diagonal members and vertical columns to form a mega-truss. To determine the actual dynamic characteristics of the constructed slab system, ambient and forced vibration tests were performed. Thirty five setups were performed in the ambient vibration test to determine the mode shapes with a high spatial resolution. A recently developed Fast Bayesian FFT Method was used to identify the modal properties using the ambient data, where the mode shapes from individual setups were assembled by least square fitting. Forced vibration tests were performed by exciting the slabs with a long-stroke electromagnetic shaker, resulting in vibration amplitudes of the order of a few milli-g. A frequency sweep was carried out in the forced vibration tests and the modal properties were identified by least square fitting of steady-state amplitude spectra. The dynamic properties identified from the ambient and forced vibration tests will be compared and discussed.

AB - This paper presents work on full-scale vibration tests of the second and third floor slabs of the Tin Shui Wai Indoor Recreation Centre. The concrete slabs are supported by one-way long span steel trusses and are connected by diagonal members and vertical columns to form a mega-truss. To determine the actual dynamic characteristics of the constructed slab system, ambient and forced vibration tests were performed. Thirty five setups were performed in the ambient vibration test to determine the mode shapes with a high spatial resolution. A recently developed Fast Bayesian FFT Method was used to identify the modal properties using the ambient data, where the mode shapes from individual setups were assembled by least square fitting. Forced vibration tests were performed by exciting the slabs with a long-stroke electromagnetic shaker, resulting in vibration amplitudes of the order of a few milli-g. A frequency sweep was carried out in the forced vibration tests and the modal properties were identified by least square fitting of steady-state amplitude spectra. The dynamic properties identified from the ambient and forced vibration tests will be compared and discussed.

KW - Ambient vibration test

KW - Forced vibration test

KW - Modal identification

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DO - 10.1016/j.proeng.2011.07.166

M3 - RGC 32 - Refereed conference paper (with host publication)

T3 - Procedia Engineering

SP - 1318

EP - 1325

BT - The Proceedings of the Twelfth East Asia-Pacific Conference on Structural Engineering and Construction - EASEC12

A2 - LAM, Heung Fai

T2 - 12th East Asia-Pacific Conference on Structural Engineering and Construction (EASEC-12)

Y2 - 26 January 2011 through 28 January 2011

ER -

Field Measurement and Modal Identification of a Coupled Floor Slab System

Abstract

Publication series

Conference

UN SDGs

Research Keywords

Publisher's Copyright Statement

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