System identification of a full-scale five-story reinforced concrete building tested on the NEES-UCSD shake table

Rodrigo Astroza, Hamed Ebrahimian, Joel P. Conte, Jose I. Restrepo, Tara C. Hutchinson

Resultado de la investigación: Capítulo del libro/informe/acta de congresoContribución a la conferenciarevisión exhaustiva

Resumen

This paper presents the identification of the modal properties of a full-scale 5-story reinforced concrete (R/C) building outfitted with a variety of nonstructural components and systems (NCSs) tested on the unidirectional NEES-UCSD shake table in April-May, 2012. The building specimen was tested under base-isolated (BI) and fixed-base (FB) configurations. The purpose of the test program was to study the seismic response of the structure and NCSs and their dynamic interaction at different levels of seismic excitation. For each base configuration (BI and FB), the building was subjected to a sequence of earthquake base motions carefully selected so as to progressively increase the seismic demand on the structure and NCSs. Before and after each seismic test, ambient vibration (AV) data were recorded, and additionally, low amplitude white noise (WN) base excitation tests were conducted at key stages during the test protocol. Because of the low intensity of the ambient and WN base excitations, a quasi-linear response of the system is assumed, and the modal parameters of an equivalent linear time-invariant (LTI) model are estimated. Using the structural vibration data recorded by 28 accelerometers, three system identification methods, including two output-only (SSI-DATA and NExT-ERA) and one input-output (DSI), are used to estimate the modal properties of the BI and FB building between seismic tests. The results show that the modal properties obtained by different methods are in good agreement and that the estimated modal parameters of the building are affected by the amplitude of the excitation, environmental conditions, and structural/nonstructural damage in the structure.

Idioma originalInglés
Título de la publicación alojadaProceedings of the 9th International Conference on Structural Dynamics, EURODYN 2014
EditoresA. Cunha, P. Ribeiro, E. Caetano, G. Muller
EditorialEuropean Association for Structural Dynamics
Páginas2333-2340
Número de páginas8
ISBN (versión digital)9789727521654
EstadoPublicada - 2014
Evento9th International Conference on Structural Dynamics, EURODYN 2014 - Porto, Portugal
Duración: 30 jun 20142 jul 2014

Serie de la publicación

NombreProceedings of the International Conference on Structural Dynamic , EURODYN
Volumen2014-January
ISSN (versión impresa)2311-9020

Conferencia

Conferencia9th International Conference on Structural Dynamics, EURODYN 2014
País/TerritorioPortugal
CiudadPorto
Período30/06/142/07/14

Huella

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