Dimensional response analysis of bilinear systems subjected to non-pulselike earthquake ground motions
Karavasilis, Theodore L., Seo, Choung-Yeol and Makris, Nicos. (2011) Dimensional response analysis of bilinear systems subjected to non-pulselike earthquake ground motions. Journal of Structural Engineering, Vol.137 (No.5). pp. 600-606. ISSN 0733-9445
WRAP_karavasilis_nonpulselike.pdf - Accepted Version - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Official URL: http://dx.doi.org/10.1061/(ASCE)ST.1943-541X.00003...
The maximum inelastic response of bilinear single-degree-of-freedom systems when subjected to ground motions without distinguishable pulses is revisited with dimensional analysis by identifying time scales and length scales in the time histories of recorded ground motions. The characteristic length scale is used to normalize the peak inelastic displacement of the bilinear system.
The paper adopts the mean period of the Fourier transform of the ground motion as an appropriate time scale and examines two different length scales which result from the peak ground acceleration and the peak ground velocity. When the normalized peak inelastic displacement is presented as a function of the normalized strength and normalized yield displacement, the response becomes self similar and a clear pattern emerges.
Accordingly, the paper proposes two alternative predictive master curves for the response which involve solely the strength and yield displacement of the bilinear SDOF system in association with either the peak ground acceleration or the peak ground velocity, together with the mean period of the Fourier transform of the ground motion. The regression coefficients that control the shape of the predictive master curves are based on 484 ground motions recorded at rock and stiff soil sites and are applicable to bilinear SDOF systems with post-yield stiffness ratio equal to 2% and inherent viscous damping ratio equal to 5%.
|Item Type:||Journal Article|
|Subjects:||Q Science > QA Mathematics
T Technology > TA Engineering (General). Civil engineering (General)
|Divisions:||Faculty of Science > Engineering|
|Library of Congress Subject Headings (LCSH):||Earthquakes -- Mathematical models, Earthquake engineering|
|Journal or Publication Title:||Journal of Structural Engineering|
|Publisher:||American Society of Civil Engineers|
|Number of Pages:||7|
|Page Range:||pp. 600-606|
|Access rights to Published version:||Restricted or Subscription Access|
Akkar S, Kucukdogan B. Direct use of PGV for estimating peak nonlinear oscillator displacements. Earthquake Engineering and Structural Dynamics 2008; 37:1411-1433.
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