Maio 2014 vol. 1 num. 1 - 10th World Congress on Computational Mechanics

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A COMPUTATIONAL MODEL FOR STOCHASTIC WAVE PROPAGATION IN LONG STRUCTURES

Zhang, Ruichong ; Gargab, Lotfi ;

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This paper introduces a computational model for stochastic wave propagation in long structures of civil and mechanical engineering systems, exemplified as towers and pipelines, and characterized with one-dimensional waveguide materials inter-connected with lumped mass. The model can be used for predictive wave response analysis as well as for system identification and damage diagnosis in structural health monitoring. In this study, wave response at one location of the structure is derived to an impulsive motion at another location in time and frequency domains, termed here as wave-based or generalized impulse and frequency response functions. Not only does this study show vibration features in wave responses with the hybrid model, typically explainable and usable with discrete or multi-degree-of-freedom modeling. The model based responses also capture wave scattering features traditionally comprehensible with continuous modeling. The latter plays a major role in effectively detecting structural damage crack, stiffness degradation, and/or material non-linearity. Two examples are presented with the use of the modeling. One is wave-based characterization of ten-story Millikan Library in Pasadena, California with the recordings of Yorba Linda earthquake of September 3, 2002. The other is analysis for influence of stochastic material/geometrical features in wave responses.

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Palavras-chave: Wave-based approach, Seismic responses of buildings, System identification.,

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DOI: 10.5151/meceng-wccm2012-16767

Referências bibliográficas
  • [1] Kohler MD, Heaton TH, Bradford SC., “Propagating waves in the steel, moment-frame factor building recorded during earthquakes. Bulletin of the Seismology Society of America. 97(4), 1334-45, 2007.
  • [2] Safak E., “Wave-propagation formulation of seismic response of multistory building. Journal of Structural Engineering, ASCE 125(4), 426-37, 1999.
  • [3] Snieder R., Safak E., “Extracting the building response using seismic interferometry: theory and application to the Millikan library in Pasadena, California. Bulletin of the Seismology Society of America. 96(2), 586-98, 2006.
  • [4] Snieder R., Sheiman J., Calvert R., “Equivalence of virtual-source method and wave-field deconvolution in seismic interferometry. Physical Review 2006.E73:066620(9pages).
  • [5] Todorovska MI., Ivanovic SS., Trifunac MD., “Wave propagation in a seven-story reinforced concrete building I: Theoretical models. Soil Dynamics and Earthquake Engineering21, 21123, 2001.
  • [6] Cai GQ, Lin YK., “Localization of wave propagation in disordered periodic structures. AIAA Journal29(3), 450-6, 1991.
  • [7] Lin YK.,Wu WF., “A closed form earthquake response analysis of multistory building on compliance soil. Journal of Structural Engineering12(1), 87-110, 1984.
  • [8] Zhang R.,Yong Y., Lin YK., “Earthquake ground motion modeling. I: Deterministic point source and II: Stochastic line source.. Journal of Engineering Mechanics-ASCE 117, 2114-32 and 2132-50, 1991.
  • [9] Zhang R., “Some observations on modeling of wave motion in a layer-based elastic medium. Journal of Sound and Vibration 229(5), 1193-1212, 2000.
  • [10] Chopra A. “Dynamics of structures-theory and applications to earthquake engineering. Prentice-Hall,Inc , 1995.
  • [11] Lin YK, Cai GQ, “Probabilistic structural dynamics-advanced theory and applications. McGraw-Hill,Inc 229(5), 1995
  • [12] Zhang, R., S. Al Hilali, A. Abdulla, and M. Al Kurbi, “A Wave-based Approach for Seismic Response Analyses of High-Rise Buildings. proceedings of the IUTAM Symposium (International Union for Theoretical and Applied Mechanics) Vol. 29, Nonlinear Stochastic Dynamics and Control (Zhu, Lin and Cai, eds.), 336-346, ISBN: 978-94-007-0731-3, 2010
  • [13] Zhang, R., R. Snieder, L. Gargab and A. Seibi, “Modeling of seismic wave motion in high-rise buildings. Probabilistic Engineering Mechanics 25, 520-527, 2011
Como citar:

Zhang, Ruichong; Gargab, Lotfi; "A COMPUTATIONAL MODEL FOR STOCHASTIC WAVE PROPAGATION IN LONG STRUCTURES", p. 351-369 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-16767

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