Results 41 to 50 of about 7,006 (179)

Time-frequency representation of earthquake accelerograms and inelastic structural response records using the adaptive chirplet decomposition and empirical mode decomposition [PDF]

, 2007
In this paper, the adaptive chirplet decomposition combined with the Wigner-Ville transform and the empirical mode decomposition combined with the Hilbert transform are employed to process various non-stationary signals (strong ground motions and ...
A. Giaralis, Baraniuk, Boashash, Boashash, Burrus, Chen, Cohen, Flandrin, Gabor, Huang, Huang, Kijewski-Correa, Loh, Mallat, Mallat, Mann, N.P. Politis, Ohtori, Olhede, P.D. Spanos, Qian, Qian, Spanos, Spencer, Wang, Xu, Yan, Yang, Yin, Zhang, Zhang, Zhang   +31 more
core   +1 more source

The Effect of Using Hysteresis Models (Bilinear and Modified Clough) on Seismic Demands of Single Degree of Freedom Systems [PDF]

American Journal of Applied Sciences, 2016
Based on nonlinear inelastic dynamic analysis of Single Degree Of Freedom systems (SDOF), this work investigates the effect of different parameters on the seismic response of these systems. Generalized SDOF systems that present both short and long period structures are subjected to two sets of synthetic ground motions according to the site condition ...
Ahmad N. Tarawneh, Sereen A. Majdalaweyh, Bassam Z. Mahasneh   +2 more
openaire   +1 more source

Characterization of Fuel Rods Supported by Dimple‐Less Spacer Grids and Subjected to Nonlinear Vibrations

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT An experimental campaign was undertaken to demonstrate the applicability of the Bouc–Wen hysteretic model to describe the hysteretic system of the recent Framatome dimple‐less spacer grid design for Pressurized Water Reactors. The experimental setup subjected a reduced‐length fuel rod, supported at both ends by dimple‐less grids, to forced ...
Giovanni Ferrari, Brian Painter, Kostas Karazis, Marco Amabili   +3 more
wiley   +1 more source

Discontinuous Percolation Transitions in Epidemic Processes, Surface Depinning in Random Media and Hamiltonian Random Graphs

, 2012
Discontinuous percolation transitions and the associated tricritical points are manifest in a wide range of both equilibrium and non-equilibrium cooperative phenomena. To demonstrate this, we present and relate the continuous and first order behaviors in
B. Bollobás, D. Stauffer, Golnoosh Bizhani, Janssen, Maya Paczuski, P. W. Holland, Peter Grassberger   +6 more
core   +1 more source

Experimental investigation of reinforced concrete members subjected to reversed cyclic axial loading

Structural Concrete, EarlyView.
Abstract This paper presents an experimental campaign of five reinforced concrete members subjected to cyclic axial loading alternating between tension and compression. Fiber optical sensors and digital image correlation, in combination with automated crack detection and measurement, were used to investigate, among other aspects, the development of ...
Simon Karrer, Karel Thoma, Walter Kaufmann   +2 more
wiley   +1 more source

OPTIMAL SEISMIC PROTECTION OF STRUCTURES ON BEARINGS WITH BILINEAR HYSTERETIC CHARACTERISTIC

International Journal for Computational Civil and Structural Engineering
The design of optimal seismic protection systems on bearings with hysteresis behavior leads to a conditional multidimensional global optimization problem with a nonlinear and non-differentiable objective function.
Elena Poznyak, Olga Novikova, Vladimir Radin, Alexey Kiselev, Yulia Ivanova   +4 more
doaj   +1 more source

Model structure detection and system identification of metal rubber devices [PDF]

, 2010
Metal rubber (MR) devices, a new wire mesh material, have been extensively used in recent years due to several unique properties especially in adverse environments.
Billings, S.A., Lang, Z.Q., Rongong, J.A., Tomlinson, G.R., Zhang, B.   +4 more
core  

Mechanism for nonequilibrium symmetry breaking and pattern formation in magnetic films

, 2005
Magnetic thin films exhibit a strong variation in properties depending on their degree of disorder. Recent coherent x-ray speckle experiments on magnetic films have measured the loss of correlation between configurations at opposite fields and at the ...
A. Lyberatos, H. Barkhausen, J. M. Deutsch, L. V. Meisel, Trieu Mai   +4 more
core   +1 more source

Response of the Bilinear Hysteretic System to Stationary Random Excitation [PDF]

, 1968
Time-average statistics of the response of the bilinear hysteretic system to an excitation with approximately white-power spectral density and approximately Gaussian probability distribution are determined, using electronic-analog techniques. Results are
Iwan, W. D., Lutes, L. D.
core   +1 more source

Resource Availability and Habitat Quality Drive Time‐Lag Effects in High‐Altitude Ungulate Distribution

Integrative Zoology, EarlyView.
Our analysis revealed that while climate strongly influenced species distributions, habitat change drove most observed delays in distribution responses. In terms of community ecology, dispersed communities exhibited shorter time lags than concentrated groups. Analyses of lag duration revealed a 5–6‐year distribution lag effect in high‐altitude ungulate
Lu Wang, Xiuming Li, Ben Huang, Xiaoxue Li, Jizhen Chen, Ziyan Liao, Kun Jin   +6 more
wiley   +1 more source