System identification of a five-story building using seismic strong-motion data

Rodrigo Astroza; Francisco Hernández; Pablo Díaz; Gonzalo Gutierrez

doi:10.1007/978-3-030-12115-0_24

System identification of a five-story building using seismic strong-motion data

Rodrigo Astroza^*, Francisco Hernández, Pablo Díaz, Gonzalo Gutierrez

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Scopus citations

Abstract

A full scale five-story reinforced concrete building was built and tested on the Large High Performance Outdoor Shake Table (LHPOST) at the University of California, San Diego in 2012. The main objective of the test program was to study the seismic response of the structure and the nonstructural components (NSCs) and their dynamic interaction at different levels of seismic excitation. The building specimen was first tested base-isolated and then fixed at its base. In the fixed-base configuration, a suite of six earthquake motions of various intensities was applied to the building to progressively increase the seismic demand. In this paper, the modal parameters of the fixed-base building are identified using the input-output dynamic data recorded during the seismic tests. The deterministic-stochastic subspace identification method (DSI) is employed to estimate the variations of the modal properties of the building during the seismic tests by employing a short-time windowing approach. The changes of the modal parameters during the seismic motions are tracked, analyzed, and compared to those previously obtained from ambient vibrations and low-amplitude white noise base excitation tests. The identified natural frequencies and equivalent damping ratios of the building changed with the intensity of the input motions and damage in the structure, while the mode shapes are found to be insensitive to them.

Original language	English
Title of host publication	Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019
Editors	Shamim Pakzad
Publisher	Springer New York LLC
Pages	181-189
Number of pages	9
ISBN (Print)	9783030121143
DOIs	https://doi.org/10.1007/978-3-030-12115-0_24
State	Published - 2020
Event	37th IMAC, A Conference and Exposition on Structural Dynamics, 2019 - Orlando, United States Duration: 28 Jan 2019 → 31 Jan 2019

Publication series

Name	Conference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)	2191-5644
ISSN (Electronic)	2191-5652

Conference

Conference	37th IMAC, A Conference and Exposition on Structural Dynamics, 2019
Country/Territory	United States
City	Orlando
Period	28/01/19 → 31/01/19

Bibliographical note

Funding Information:
Acknowledgements The authors are very grateful to Professors Tara C. Hutchinson, Joel P. Conte, and José I. Restrepo from the University of California, San Diego for making these data available (DOI: 10.4231/D38W38349). R. Astroza acknowledges the financial support from the Chilean National Commission for Scientific and Technological Research (CONICYT), through FONDECYT research grant No. 11160009.

Funding Information:
The authors are very grateful to Professors Tara C. Hutchinson, Joel P. Conte, and José I. Restrepo from the University of California, San Diego for making these data available (DOI: 10.4231/D38W38349). R. Astroza acknowledges the financial support from the Chilean National Commission for Scientific and Technological Research (CONICYT), through FONDECYT research grant No. 11160009.

Publisher Copyright:
© Society for Experimental Mechanics, Inc. 2020.

Keywords

Damage
Modal properties
Shake table
System identification

Access to Document

10.1007/978-3-030-12115-0_24

Cite this

Astroza, R., Hernández, F., Díaz, P., & Gutierrez, G. (2020). System identification of a five-story building using seismic strong-motion data. In S. Pakzad (Ed.), Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019 (pp. 181-189). (Conference Proceedings of the Society for Experimental Mechanics Series). Springer New York LLC. https://doi.org/10.1007/978-3-030-12115-0_24

Astroza, Rodrigo ; Hernández, Francisco ; Díaz, Pablo et al. / System identification of a five-story building using seismic strong-motion data. Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019. editor / Shamim Pakzad. Springer New York LLC, 2020. pp. 181-189 (Conference Proceedings of the Society for Experimental Mechanics Series).

@inproceedings{00fc8b4e0d33453f84de7df0a53fbb1b,

title = "System identification of a five-story building using seismic strong-motion data",

abstract = "A full scale five-story reinforced concrete building was built and tested on the Large High Performance Outdoor Shake Table (LHPOST) at the University of California, San Diego in 2012. The main objective of the test program was to study the seismic response of the structure and the nonstructural components (NSCs) and their dynamic interaction at different levels of seismic excitation. The building specimen was first tested base-isolated and then fixed at its base. In the fixed-base configuration, a suite of six earthquake motions of various intensities was applied to the building to progressively increase the seismic demand. In this paper, the modal parameters of the fixed-base building are identified using the input-output dynamic data recorded during the seismic tests. The deterministic-stochastic subspace identification method (DSI) is employed to estimate the variations of the modal properties of the building during the seismic tests by employing a short-time windowing approach. The changes of the modal parameters during the seismic motions are tracked, analyzed, and compared to those previously obtained from ambient vibrations and low-amplitude white noise base excitation tests. The identified natural frequencies and equivalent damping ratios of the building changed with the intensity of the input motions and damage in the structure, while the mode shapes are found to be insensitive to them.",

keywords = "Damage, Modal properties, Shake table, System identification",

author = "Rodrigo Astroza and Francisco Hern{\'a}ndez and Pablo D{\'i}az and Gonzalo Gutierrez",

note = "Funding Information: Acknowledgements The authors are very grateful to Professors Tara C. Hutchinson, Joel P. Conte, and Jos{\'e} I. Restrepo from the University of California, San Diego for making these data available (DOI: 10.4231/D38W38349). R. Astroza acknowledges the financial support from the Chilean National Commission for Scientific and Technological Research (CONICYT), through FONDECYT research grant No. 11160009. Funding Information: The authors are very grateful to Professors Tara C. Hutchinson, Joel P. Conte, and Jos{\'e} I. Restrepo from the University of California, San Diego for making these data available (DOI: 10.4231/D38W38349). R. Astroza acknowledges the financial support from the Chilean National Commission for Scientific and Technological Research (CONICYT), through FONDECYT research grant No. 11160009. Publisher Copyright: {\textcopyright} Society for Experimental Mechanics, Inc. 2020.; 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019 ; Conference date: 28-01-2019 Through 31-01-2019",

year = "2020",

doi = "10.1007/978-3-030-12115-0_24",

language = "English",

isbn = "9783030121143",

series = "Conference Proceedings of the Society for Experimental Mechanics Series",

publisher = "Springer New York LLC",

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}

Astroza, R , Hernández, F, Díaz, P & Gutierrez, G 2020, System identification of a five-story building using seismic strong-motion data. in S Pakzad (ed.), Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019. Conference Proceedings of the Society for Experimental Mechanics Series, Springer New York LLC, pp. 181-189, 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019, Orlando, United States, 28/01/19. https://doi.org/10.1007/978-3-030-12115-0_24

System identification of a five-story building using seismic strong-motion data. / Astroza, Rodrigo ; Hernández, Francisco; Díaz, Pablo et al.
Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019. ed. / Shamim Pakzad. Springer New York LLC, 2020. p. 181-189 (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

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AU - Hernández, Francisco

AU - Díaz, Pablo

AU - Gutierrez, Gonzalo

N1 - Funding Information: Acknowledgements The authors are very grateful to Professors Tara C. Hutchinson, Joel P. Conte, and José I. Restrepo from the University of California, San Diego for making these data available (DOI: 10.4231/D38W38349). R. Astroza acknowledges the financial support from the Chilean National Commission for Scientific and Technological Research (CONICYT), through FONDECYT research grant No. 11160009. Funding Information: The authors are very grateful to Professors Tara C. Hutchinson, Joel P. Conte, and José I. Restrepo from the University of California, San Diego for making these data available (DOI: 10.4231/D38W38349). R. Astroza acknowledges the financial support from the Chilean National Commission for Scientific and Technological Research (CONICYT), through FONDECYT research grant No. 11160009. Publisher Copyright: © Society for Experimental Mechanics, Inc. 2020.

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N2 - A full scale five-story reinforced concrete building was built and tested on the Large High Performance Outdoor Shake Table (LHPOST) at the University of California, San Diego in 2012. The main objective of the test program was to study the seismic response of the structure and the nonstructural components (NSCs) and their dynamic interaction at different levels of seismic excitation. The building specimen was first tested base-isolated and then fixed at its base. In the fixed-base configuration, a suite of six earthquake motions of various intensities was applied to the building to progressively increase the seismic demand. In this paper, the modal parameters of the fixed-base building are identified using the input-output dynamic data recorded during the seismic tests. The deterministic-stochastic subspace identification method (DSI) is employed to estimate the variations of the modal properties of the building during the seismic tests by employing a short-time windowing approach. The changes of the modal parameters during the seismic motions are tracked, analyzed, and compared to those previously obtained from ambient vibrations and low-amplitude white noise base excitation tests. The identified natural frequencies and equivalent damping ratios of the building changed with the intensity of the input motions and damage in the structure, while the mode shapes are found to be insensitive to them.

AB - A full scale five-story reinforced concrete building was built and tested on the Large High Performance Outdoor Shake Table (LHPOST) at the University of California, San Diego in 2012. The main objective of the test program was to study the seismic response of the structure and the nonstructural components (NSCs) and their dynamic interaction at different levels of seismic excitation. The building specimen was first tested base-isolated and then fixed at its base. In the fixed-base configuration, a suite of six earthquake motions of various intensities was applied to the building to progressively increase the seismic demand. In this paper, the modal parameters of the fixed-base building are identified using the input-output dynamic data recorded during the seismic tests. The deterministic-stochastic subspace identification method (DSI) is employed to estimate the variations of the modal properties of the building during the seismic tests by employing a short-time windowing approach. The changes of the modal parameters during the seismic motions are tracked, analyzed, and compared to those previously obtained from ambient vibrations and low-amplitude white noise base excitation tests. The identified natural frequencies and equivalent damping ratios of the building changed with the intensity of the input motions and damage in the structure, while the mode shapes are found to be insensitive to them.

KW - Damage

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KW - Shake table

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DO - 10.1007/978-3-030-12115-0_24

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T3 - Conference Proceedings of the Society for Experimental Mechanics Series

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BT - Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019

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Astroza R , Hernández F, Díaz P, Gutierrez G. System identification of a five-story building using seismic strong-motion data. In Pakzad S, editor, Dynamics of Civil Structures, Volume 2 - Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019. Springer New York LLC. 2020. p. 181-189. (Conference Proceedings of the Society for Experimental Mechanics Series). doi: 10.1007/978-3-030-12115-0_24

System identification of a five-story building using seismic strong-motion data

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

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